HORIBA Replacement Electrodes – Suitable Sensors for Reliable Continued Operation

Manufacturer Part Nr. 3200459834

The HORIBA LAQUAtwin Pocket Tester series provides a comprehensive solution for fast and precise measurement of water quality parameters directly in the field. To ensure these measurements remain reliable and accurate, regular monitoring of the sensors and, if necessary, replacement with spare sensors is crucial. These replacement sensors are tailor-made for the HORIBA LAQUAtwin series and cover a wide range of types for various measurements: pH, conductivity, salinity, redox (ORP), as well as ion-selective sensors for sodium, potassium, nitrate, calcium, and fluoride. Each sensor is designed to maximize user-friendliness and accuracy, which HORIBA is renowned for in water quality testing worldwide. HORIBA replacement sensors guarantee users that their devices consistently deliver optimal performance and precise measurements. Advantages of HORIBA Replacement Sensors Easy Replacement: Sensors can be exchanged quickly, allowing uninterrupted measurement. High Accuracy: Replacement sensors ensure precise and reliable results. Wide Measurement Range: Various sensor types are available to capture a broad spectrum of water quality parameters. Durability: Sensors are designed for long service life, even under challenging conditions. Sensor Replacement Instructions Follow these steps to replace the sensor and maintain the longevity and accuracy of your HORIBA LAQUAtwin Pocket Tester: Removing the Sensor Turn off the tester. Lift the sensor tip slightly and pull the sensor away from the device. Completely detach the sensor from the tester. Installing the Sensor Make sure the tester is turned off. Ensure the waterproof gasket is intact and clean. Attach the sensor to the tester so that hook “A” on the back of the device fits into hole “a” on the sensor tip. Make sure the waterproof gasket is not twisted. Important: After replacing the sensor, follow the instructions in the user manual of the respective tester to make the device ready for accurate measurements. This typically includes calibration and, if necessary, conditioning. How can I tell if my sensor is worn out? Check the sensor condition as follows: Perform a 2-point calibration. If an error occurs during calibration, this indicates that the sensor has deteriorated. In this case, the sensor should be replaced. Regular checks and timely replacement of sensors ensure the high quality and reliability of your water quality measurements with HORIBA LAQUAtwin Pocket Testers. Please note: The salt exchange sensors, both old and new, are not compatible with each other. Similarly, the conditioning solutions for the old and new versions are not compatible with the respective device variants. How can you tell if you have an older or a new device? If your Pocket Tester is marked ‘4-cell’, you have the latest version of this device. In this case, you will need the replacement sensors listed in the cross-selling section, as well as the standard and conditioning solutions. These have been specially optimised for the new Pocket Testers and are not suitable for older models. Manufacturer Part Nr. 3200459866

HORIBA LAQUAtwin Pocket Tester Sensors – Quick, Accurate, and Reliable The HORIBA LAQUAtwin Pocket Tester series enables fast and precise on-site measurement of water quality parameters. To ensure consistently reliable results, it is essential to check the sensors regularly and replace them when necessary.These replacement sensors are specially designed for the HORIBA LAQUAtwin series and are available in a wide range of variants for different measurements: pH, conductivity, salinity, redox (ORP), and ion-selective sensors for sodium, potassium, nitrate, calcium, and fluoride. Each sensor is engineered for maximum user-friendliness and accuracy—qualities that have made HORIBA a global leader in water quality testing.  Benefits of HORIBA Replacement Sensors: Easy replacement – Simple sensor exchange allows quick resumption of measurements. High accuracy – Ensures precise and reliable measurement results. Wide application range – Different sensors available for various water quality parameters. Durability – Designed for long service life, even under demanding conditions.Sensor Replacement InstructionsRemoving the sensor:  Switch off the tester.  Lift the sensor tip, then slide it slightly away from the device.  Pull the sensor out completely.  Attaching the sensor:  Ensure the tester is switched off.  Check that the waterproof seal is clean and intact.  Press the sensor into the device so that hook "A" on the tester fits into hole "a" on the sensor tongue.  Make sure the seal is not twisted. Important: After replacement, follow the instructions in your tester’s user manual to resume operation. Calibration—and in some cases conditioning—may be required. (Calibration instructions are included with the product.)  FAQ – Checking Sensor WearQ: How can I tell if my sensor is worn out? A: Perform a 2-point calibration. If a calibration error occurs, this indicates sensor deterioration and the sensor should be replaced.Regular inspection and timely replacement of sensors will ensure the long-term accuracy, reliability, and high quality of your HORIBA LAQUAtwin Pocket Tester measurements. Manufacturer Part Nr. 3200459867

Manufacturer Part Nr. 3200459868

HORIBA Nitrate Replacement Sensor (S040) for Pocket Testers NO3-11, NO3-11C and NO3-11SThe HORIBA LAQUAtwin Pocket Tester series allows water quality parameters to be measured quickly and accurately on site. To ensure that these measurements are reliable and accurate, it is very important to check the sensors regularly and replace them with replacement sensors if necessary. These replacement sensors have been specially developed for the HORIBA LAQUAtwin series and offer a wide range of variants for different measurements: pH value, conductivity, salinity, redox (ORP) and ion-selective sensors for sodium, potassium, nitrate, calcium and fluoride. Each of these sensors has been designed with the aim of maximising user-friendliness and accuracy, for which HORIBA is known worldwide in the field of water quality testing. The advantages of HORIBA replacement sensors are: Easy replacement: It is easy to replace the sensors, allowing measurements to be resumed quickly. Highest accuracy: The replacement sensors ensure that the measurement results are precise and reliable.Wide range of measurements: Different types of sensors are available for different water quality parameters.Durability: The sensors are designed to have a long service life even under challenging conditions. Instructions for replacing the sensor: To ensure that your HORIBA LAQUAtwin Pocket Tester is durable and accurate, please follow these steps when replacing the sensor:Remove the sensor Switch off the measuring device. Lift the tip of the sensor. Then slide the sensor slightly away from the measuring device. Remove the sensor completely from the measuring device (by pulling).Attaching the sensor  Switch off the measuring device. Make sure that the water-repellent seal is clean and undamaged. Press the sensor onto the measuring device so that hook ‘A’ on the back of the device fits into hole ‘a’ on the tongue of the sensor.Make sure that the waterproof seal is not twisted. Important:To put the measuring device back into operation for correct measurement, follow the steps in the operating instructions for the corresponding tester after replacement. (Our products include such instructions. In most cases, calibration and, if necessary, conditioning are required.)  Question: How can I check if my sensor is worn out?  Answer: By checking the condition of the sensor as follows:  Perform a 2-point calibration to check the sensor condition. If a calibration error occurs, this suggests that the sensor is deteriorating. The sensor should therefore be replaced.  Regular checks and timely replacement of sensors ensure the high quality and reliability of your water quality measurements using the HORIBA LAQUAtwin Pocket Testers.  Manufacturer item number: 3200459870

The HORIBA LAQUAtwin Pocket Tester series provides a comprehensive solution for immediate and precise measurement of water quality parameters directly in the field. To ensure these measurements remain reliable and accurate, regular monitoring of the sensors and, if necessary, replacement with spare sensors is essential. The replacement sensors are specifically designed for the HORIBA LAQUAtwin series and cover a wide range of types for various measurements: pH, conductivity, salinity, redox (ORP), as well as ion-selective sensors for sodium, potassium, nitrate, calcium, and fluoride. Each sensor is engineered to maximize user-friendliness and accuracy, qualities for which HORIBA is globally recognized in water quality testing. HORIBA replacement sensors ensure that users’ devices consistently deliver optimal performance and precise measurements. Advantages of HORIBA Replacement Sensors: Easy Replacement: The sensors can be replaced quickly, allowing measurements to continue without delay. High Precision: Replacement sensors ensure that results are accurate and reliable. Wide Measurement Range: Various sensor types are available to cover a broad spectrum of water quality parameters. Durability: The sensors are designed for long service life, even under challenging conditions. Sensor Replacement Instructions: Follow these steps when replacing the sensor to ensure the longevity and accuracy of your HORIBA LAQUAtwin Pocket Tester: Removing the Sensor: Turn off the tester. Lift the sensor tip slightly and pull the sensor a short distance away from the device. Completely detach the sensor from the tester. Installing the Sensor: Ensure the tester is turned off. Check that the waterproof gasket is intact and clean. Place the sensor onto the tester so that hook “A” on the back of the device fits into hole “a” on the sensor tip. Make sure the waterproof gasket is not twisted. Important: After replacing the sensor, follow the instructions in the user manual of the respective tester to make the device ready for accurate measurement. These manuals are available with the products and typically require calibration and, if necessary, conditioning. How can I tell if my sensor is worn out? Check the sensor condition as follows: Perform a 2-point calibration. If an error occurs during calibration, this indicates that the sensor has deteriorated. In this case, the sensor should be replaced. Regular checks and timely sensor replacement ensure that water quality measurements with HORIBA LAQUAtwin Pocket Testers remain accurate and reliable. Manufacturer Part Nr. 3200459869

The HORIBA LAQUAtwin Pocket Testers provide a comprehensive solution for immediate and precise measurement of water quality parameters directly in the field. To ensure that these measurements remain reliable and accurate, it is essential to regularly check the sensors and replace them with spare sensors if necessary. The replacement sensors, developed specifically for the HORIBA LAQUAtwin series, cover a variety of types for different measurements: pH, conductivity, salinity, redox (ORP), as well as ion-selective sensors for sodium, potassium, nitrate, calcium, and fluoride. Each of these sensors is designed to maximize user-friendliness and precision, qualities for which HORIBA is globally recognized in water quality testing. HORIBA replacement sensors ensure that users’ devices consistently deliver optimal performance and accurate measurements. Advantages of HORIBA Replacement Sensors: Easy Replacement: Sensors can be replaced quickly, allowing measurements to continue without delay. High Precision: Replacement sensors ensure results are accurate and reliable. Comprehensive Measurement Range: Various sensor types are available to measure a wide range of water quality parameters. Durability: Sensors are designed for long service life even under challenging conditions. Sensor Replacement Instructions: To ensure the longevity and accuracy of your HORIBA LAQUAtwin Pocket Tester, follow these steps when replacing a sensor: Removing the Sensor: Turn off the tester. Slightly move the sensor away from the device and lift the sensor tip. Detach the sensor completely from the tester so there is no connection between the two parts. Installing the Sensor: Ensure the tester is turned off. Check that the waterproof gasket is clean and intact. Attach the sensor to the tester by inserting hook “A” on the back of the device into hole “a” on the sensor tip. Ensure that the waterproof gasket is not twisted. Important: After replacing the sensor, follow the instructions in the user manual of the respective tester to make the device ready for accurate measurement. (These manuals are available with the products. Calibration and, if necessary, conditioning are usually required.) How can I check if my sensor shows signs of wear? Check the sensor condition as follows: Perform a 2-point calibration. If an error occurs during calibration, this indicates that the sensor has deteriorated. In this case, it is recommended to replace the sensor. Regular checks and timely replacement of sensors are essential to ensure the high standards and reliability of water quality measurements performed with HORIBA LAQUAtwin Pocket Testers. Manufacturer Part Nr. 3200934450

The HORIBA LAQUAtwin Pocket Tester series allows water quality parameters to be measured quickly and accurately directly on site. To ensure that these measurements are reliable and accurate, it is essential to check the sensors regularly and replace them with replacement sensors where necessary. These replacement sensors have been specifically developed for the HORIBA LAQUAtwin series and offer a wide range of variants for various measurements: pH, conductivity, salinity, redox (ORP), as well as ion-selective sensors for sodium, potassium, nitrate, calcium and fluoride. Each of these sensors has been developed with the aim of maximising the user-friendliness and accuracy for which HORIBA is renowned worldwide in the field of water quality testing. The advantages of HORIBA replacement sensors are: Easy replacement: The sensors are easy to replace, allowing measurements to resume quickly. Highest accuracy: The replacement sensors ensure that measurement results are precise and reliable. Wide range of measurements: Various types of sensors are available for different water quality parameters. Durability: The sensors are designed to have a long service life, even under challenging conditions. Instructions for sensor replacement: To ensure that your HORIBA LAQUAtwin Pocket Tester remains durable and accurate, please follow these steps when replacing the sensor: Removing the sensor Switch off the meter. Lift the tip of the sensor. Then slide the sensor slightly away from the meter. Remove the sensor completely from the meter (by pulling). Fitting the sensor Switch off the meter. Ensure that the water-resistant seal is clean and undamaged. Press the sensor onto the meter so that the hook ‘A’ on the back of the meter fits into the hole ‘a’ on the sensor tab. Make sure that the waterproof seal is not twisted. Important: To get the measuring device back up and running for accurate measurements, follow the steps in the user manual for the relevant tester after replacing the sensor. (Our products include such manuals. In most cases, calibration and, if necessary, conditioning are required.) Question: How can I check if my sensor is worn out? Answer: By checking the condition of the sensor as follows: To check the sensor condition, perform a 2-point calibration. If a calibration error occurs, this suggests that the sensor is deteriorating. The sensor should therefore be replaced. By carrying out regular checks and replacing sensors in good time, you can ensure the high quality and reliability of your water quality measurements using the HORIBA LAQUAtwin Pocket Testers. Important note on compatibility Please note: The Horiba LAQUAtwin conductivity, TDS and temperature multi-parameter testers, both old and new, are not compatible with one another. Similarly, the conditioning solutions for the old and new versions are not compatible with the respective device variants. How can you tell whether you have an older or a newer device? If your pocket tester is marked ‘4-cell’, you have the latest version of this device. In this case, you will need the replacement sensors listed in the cross-selling section, as well as the standard and conditioning solutions. These have been specially optimised for the new pocket testers and are not suitable for the older models. Manufacturer’s item number: 3200459672

The HORIBA LAQUAtwin Pocket Testers provide a comprehensive solution for immediate and precise measurement of water quality parameters directly in the field. To ensure that these measurements remain reliable and accurate, it is important to regularly check the sensors and replace them with spare sensors if necessary. The replacement sensors developed for the HORIBA LAQUAtwin series cover various types for different measurements: pH, conductivity, salinity, redox (ORP), as well as ion-selective sensors for sodium, potassium, nitrate, calcium, and fluoride. All of these sensors are designed to maximize user-friendliness and precision, qualities for which HORIBA is globally recognized in water quality testing. HORIBA replacement sensors ensure that users’ devices consistently deliver optimal performance and accurate measurements. Advantages of HORIBA Replacement Sensors Easy Replacement: Sensors can be quickly exchanged, allowing measurements to continue without delay. High Precision: Replacement sensors ensure that results are exact and reliable. Wide Measurement Range: Various sensor types are available to capture a broad spectrum of water quality parameters. Durability: Sensors are designed for long service life, even under challenging conditions. Sensor Replacement Instructions To ensure the longevity and accuracy of your HORIBA LAQUAtwin Pocket Tester, please follow these instructions when replacing a sensor: Removing the Sensor Turn off the tester. Carefully detach the sensor from the device and lift the sensor tip. Completely separate the sensor from the tester so that the two components are no longer connected. Installing the Sensor Ensure the tester is turned off. Check that the waterproof gasket is clean and undamaged. Attach the sensor to the tester by inserting hook “A” on the back of the device into hole “a” on the sensor tip. Make sure the waterproof gasket is not twisted. Important: After replacing the sensor, it is essential to follow the steps in the user manual of the respective tester to make the device ready for accurate measurements. (These manuals are available with the products. Calibration and, if necessary, conditioning are usually required.) How can I check if my sensor shows signs of wear? Check the sensor condition as follows: Perform a 2-point calibration. If an error occurs during calibration, this indicates that the sensor has deteriorated. In this case, replacing the sensor is recommended. Regular checks and timely replacement of sensors are essential to ensure the high standards and reliability of water quality measurements performed with HORIBA LAQUAtwin Pocket Testers. Please note: The salt exchange sensors, both old and new, are not compatible with one another. Similarly, the conditioning solutions for the old and new versions are not compatible with the respective device variants. How can you tell whether you have an older or a newer device? If your Pocket Tester is marked ‘4-cell’, you have the latest version of this device. In this case, you will need the replacement sensors listed in the cross-selling section, as well as the standard and conditioning solutions. These have been specially optimised for the new Pocket Testers and are not suitable for the older models. Manufacturer Part Nr. 3200597237

The HORIBA LAQUAtwin Pocket Tester series provides a comprehensive solution for immediate and precise measurement of water quality parameters directly in the field. To ensure these measurements remain reliable and accurate, it is essential to regularly check the sensors and, if necessary, replace them with spare sensors. The replacement sensors, specifically designed for the HORIBA LAQUAtwin series, cover a wide range of types for various measurements: pH, conductivity, salinity, redox (ORP), as well as ion-selective sensors for sodium, potassium, nitrate, calcium, and fluoride. Each sensor is engineered to maximize user-friendliness and accuracy, for which HORIBA is globally recognized in water quality testing. HORIBA replacement sensors ensure that users’ devices consistently deliver optimal performance and precise measurements. Advantages of HORIBA Replacement Sensors: Easy Replacement: Sensors can be quickly replaced, allowing measurements to continue without delay. High Accuracy: Replacement sensors ensure that results are exact and reliable. Comprehensive Measurement Range: Various sensor types are available to cover a wide range of water quality parameters. Durability: Sensors are designed for long service life under challenging conditions. Sensor Replacement Instructions: Follow these steps when replacing the sensor to maintain the longevity and accuracy of your HORIBA LAQUAtwin Pocket Tester: Removing the Sensor: Turn off the tester. Move the sensor slightly away from the device and lift the sensor tip. Detach the sensor completely from the tester. Installing the Sensor: Ensure the tester is turned off. Make sure the waterproof gasket is clean and intact. Mount the sensor onto the tester so that hook “A” on the back of the device fits into hole “a” on the sensor tip. Ensure the waterproof gasket is not twisted. Important: After replacing the sensor, follow the steps in the user manual of the respective tester to make the device ready for accurate measurement. (These manuals are available with the products. Calibration and, if necessary, conditioning are usually required.) How can I check if my sensor shows signs of wear? Check the sensor condition as follows: Perform a 2-point calibration. If an error occurs during calibration, this indicates that the sensor has deteriorated. In this case, it is advisable to replace the sensor. Regular checks and timely sensor replacement ensure that water quality measurements performed with the HORIBA LAQUAtwin Pocket Testers remain highly accurate and reliable. Manufacturer Part Nr. 3200997083

Horiba S073-4EC Conductivity Replacement Sensor for 4EC-11, 4EC-22, 4EC-33 Pocket Testers The HORIBA LAQUAtwin Pocket Tester series allows water quality parameters to be measured quickly and accurately directly on site. To ensure that these measurements are reliable and accurate, it is essential to check the sensors regularly and replace them with replacement sensors where necessary. These replacement sensors have been specifically developed for the HORIBA LAQUAtwin series and offer a wide range of variants for various measurements: pH, conductivity, salinity, redox (ORP), as well as ion-selective sensors for sodium, potassium, nitrate, calcium and fluoride. Each of these sensors has been developed with the aim of maximising the user-friendliness and accuracy for which HORIBA is renowned worldwide in the field of water quality testing. The advantages of HORIBA replacement sensors are: Easy replacement: The sensors are easy to replace, allowing measurements to resume quickly. Highest accuracy: The replacement sensors ensure that measurement results are precise and reliable. Wide range of measurements: Various types of sensors are available for different water quality parameters. Durability: The sensors are designed to have a long service life, even under challenging conditions. Instructions for sensor replacement: To ensure that your HORIBA LAQUAtwin Pocket Tester remains durable and accurate, please follow these steps when replacing the sensor: Removing the sensor Switch off the meter. Lift the tip of the sensor. Then slide the sensor slightly away from the meter. Remove the sensor completely from the meter (by pulling it out). Attaching the sensor Switch off the meter. Ensure that the water-resistant seal is clean and undamaged. Press the sensor onto the meter so that the hook ‘A’ on the back of the meter fits into the hole ‘a’ on the sensor tab. Ensure that the waterproof seal is not twisted. Important: To put the meter back into service for correct measurement, follow the steps in the user manual for the relevant tester after replacement. (Our products include such manuals. In most cases, calibration and, if necessary, conditioning are required.) Question: How can I check if my sensor is worn out? Answer: By checking the condition of the sensor as follows: To check the sensor’s condition, perform a 2-point calibration. If a calibration error occurs, this suggests that the sensor is deteriorating. The sensor should therefore be replaced. By carrying out regular checks and replacing sensors in good time, you can ensure the high quality and reliability of your water quality measurements using the HORIBA LAQUAtwin Pocket Testers. Note: How can I tell if I have an old or new device? If your Pocket Tester is marked ‘4-cell’, you have the latest version of this device. In this case, you will need the replacement sensors listed in the cross-selling section, as well as the standard and conditioning solutions. These have been specially optimised for the new Pocket Testers and are not suitable for older models. Manufacturer’s item number: 3201079162

HORIBA’s LAQUAtwin pocket testers offer a comprehensive solution for the immediate and accurate measurement of water quality parameters directly on site. To ensure that these measurements remain reliable and accurate in the future, it is important to check the sensors regularly and replace them with replacement sensors when necessary. The replacement sensors developed for the HORIBA LAQUAtwin series include various types for different measurements: pH, conductivity, salinity, redox (ORP), as well as ion-selective sensors for sodium, potassium, nitrate, calcium and fluoride. These sensors have all been developed with the aim of maximising the user-friendliness and precision for which HORIBA is renowned worldwide in water quality testing. HORIBA’s replacement sensors ensure that users’ instruments always deliver optimum performance and carry out precise measurements. Advantages of HORIBA replacement sensors: Easy replacement: As the sensors are easy to replace, they can be swapped out quickly, allowing measurements to resume without delay. High precision: Thanks to the replacement sensors, measurement results are accurate and reliable. Wide measurement range: Various sensor types are available to measure a wide range of water quality parameters. Durability: The sensors are designed to have a long service life, even under difficult conditions. Product features: 4-chamber salt sensor S074-4EC Replacement sensor for LAQUAtwin 4ECSalt-11 (item number: 896096) Requires a minimum sample volume of 0.12 ml Waterproof Salinity 0.0 to 100.0 g/l, 0.00 to 10.00 % Minimum sample volume required 0.12 ml Temperature sensor Integrated Operating temperature range 5 to 40 °C Note: The sensors for LAQUAtwin-Salt11 and LAQUAtwin-4ECSalt-11 are not compatible Instructions for replacing the sensor: To ensure the longevity and accuracy of your HORIBA LAQUAtwin Pocket Tester, please follow these instructions when replacing the sensor: Removing the sensor Switch off the meter. Carefully detach the sensor from the meter and lift the tip of the probe. Disconnect the sensor from the meter so that these two components are no longer connected. Fitting the sensor Switch off the meter. Ensure that the waterproof seal is clean and undamaged. Attach the sensor to the meter by inserting the hook ‘A’ on the back of the meter into the hole ‘a’ at the tip of the sensor. Ensure that the waterproof seal is not twisted. Important: After replacement, it is essential to follow the steps in the user manual for the relevant tester to ensure the meter is ready for accurate measurements. (These instructions are available for our products. Calibration and, where necessary, conditioning are usually required.) Question: How can I check whether my sensor is showing signs of wear? Answer: By checking the sensor’s condition, as explained in more detail below: Check the condition of the sensor by performing a 2-point calibration. If an error occurs during calibration, this indicates that the sensor has deteriorated. In this case, it would be advisable to replace the sensor. To ensure the high standards and reliability of water quality measurements taken with HORIBA LAQUAtwin Pocket testers, regular checks and timely replacement of the sensors are essential. Note: How can I tell if I have an old or new device? If your Pocket Tester is marked ‘4-cell’, you have the latest version of this device. In this case, you will need the replacement sensors listed in the cross-selling section, as well as the standard and conditioning solutions. These have been specially optimised for the new Pocket Testers and are not suitable for older models. Manufacturer’s item number: 3201079163

To ensure measurements remain reliable and accurate, it is important to regularly check the sensor and replace it with a spare sensor if necessary. The replacement sensor is specifically designed for the HORIBA LAQUAtwin Ca-11C for animal blood. This sensor is engineered to optimize user-friendliness and accuracy. With HORIBA replacement sensors, users can be confident that their devices consistently deliver optimal performance and precise results. Advantages of HORIBA Replacement Sensors: Easy Replacement: Sensors can be quickly replaced, allowing measurements to continue without delay. High Accuracy: Replacement sensors ensure that results are precise and reliable. Comprehensive Measurement Range: Various sensor types are available to measure a wide range of parameters. Durability: Sensors are designed for long service life, even under challenging conditions. Sensor Replacement Instructions: To ensure the longevity and accuracy of your HORIBA LAQUAtwin Pocket Tester, please follow these instructions when replacing a sensor: Removing the Sensor: Turn off the tester. Carefully detach the sensor from the device and lift the sensor tip. Completely separate the sensor from the tester so that the two components are no longer connected. Installing the Sensor: Ensure the tester is turned off. Check that the waterproof gasket is clean and intact. Attach the sensor to the tester by inserting hook “A” on the back of the device into hole “a” on the sensor tip. Make sure the waterproof gasket is not twisted. Important: After replacing the sensor, it is essential to follow the steps in the user manual of the respective tester to make the device ready for accurate measurements. These manuals are available with the products. Calibration and, if necessary, conditioning are usually required. How can I tell if my sensor shows signs of wear? Check the sensor condition as follows: Perform a 2-point calibration to assess the sensor’s condition. If an error occurs during calibration, this indicates that the sensor has deteriorated. In this case, replacing the sensor is recommended. Regular checks and timely replacement of sensors are essential to maintain the high standards and reliability of water quality measurements performed with HORIBA LAQUAtwin Pocket Testers. S051 Calcium replacement sensor for Ca-11C Manufacturer article number: 3200772945