JUMO tecLine CL2 sensor for free chlorine
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Product information "JUMO tecLine CL2 sensor for free chlorine"
These amperometric sensors with membrane are used to determine the concentration of free chlorine. They are able to measure various inorganic chlorine compounds, including chlorine gas (Cl₂), electrolytically generated chlorine, sodium hypochlorite (NaOCl), calcium hypochlorite (Ca(OCl)₂) and chlorinated lime (Ca(OCl)Cl).
Testing for the complete absence of free chlorine is not possible with these sensors.
Depending on the version, the sensors either supply a temperature-compensated current signal (4-20 mA) in an analogue version or a Modbus RTU signal via a digital interface. Calibration takes place in a downstream device such as an indicator, controller, recorder or programmable logic controller (PLC).
The sensors can be connected directly to various transmitters or controllers. These supply the system with the required voltage and enable uncomplicated calibration.
Areas of application:
The sensors are used to measure free chlorine in drinking water, bathing water, industrial water, process water and cooling water.
Dimensions
| Height | 8 cm |
|---|---|
| Length | 30 cm |
| Width | 20 cm |
Weight
| Weight | 640 g |
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Other attributes
| Country of origin | DE |
|---|---|
| Customs tariff number | 90278990 |
| Sensor type | 202630/40 (4 to 20 mA) | 202630/50 (digital interface) |
|---|---|---|
| Measured variable | Free chlorine | |
| Application range | Swimming pool, drinking, utility and process water | |
| Suitable chlorination agents |
Inorganic chlorine compounds: sodium hypochlorite (NaOCl, bleach solution), calcium hypochlorite (Ca(OCl)₂), chlorine gas, chlorine produced via membrane electrolysis (not suitable: membrane-free chlorine electrolysis) |
|
| Measurement principle | Membrane-covered, amperometric two-electrode system with integrated electronics | |
| Membrane type | Hydrophobic PTFE membrane | |
| Measuring cable connection | Two-pole terminal connection (2 × 1 mm²) | Five-pin flange connector, M12 |
| Power supply |
UB DC 12 to 30 V (Galvanic isolation required) |
UB DC 22.5 to 26 V (Galvanically isolated in the sensor) |
| Electromagnetic compatibilitya |
Electromagnetic emissions: Class Bb Immunity to interference: Industrial requirement |
|
| Output signal | 4 to 20 mA | Modbus RTU |
| Load / current consumption | ≤ (UB - 7.5 V) ÷ 0.02 A | approx. 20 mA |
| Break-in period | 1 h | |
| flow velocity |
approx. 15 cm/s corresponds to a flow rate of approx. 30 l/h when installed in the JUMO flow fitting (part no.: 00392611) |
|
| Measuring rangesc |
0.05 to 0.5 mg/l (ppm) 0.05 to 2 mg/l (ppm) 0.05 to 5 mg/l (ppm) 0.05 to 10 mg/l (ppm) 0.05 to 100 mg/l (ppm) 0.05 to 200 mg/l (ppm) |
0.05 to 2 mg/l (ppm) 0.05 to 20 mg/l (ppm) |
| Resolution |
0.01 mg/l for a measuring range of 0.5/2/5/10 mg/l 0.1 mg/l for a measuring range of 100–200 mg/l |
0.001 mg/l for a measurement range of 2 mg/l 0.01 mg/l for a measurement range of 20 mg/l |
| Accuracyd MB 2 mg/l |
< 1 % at 0.4 mg/l < 1 % at 1.6 mg/l |
|
| Slope drifte | approx. < -1 % per month | |
| Response time t90 | approx. 30 s | |
| Operating temperature |
Measuring range: 0 to 45 °Cf Ambient temperature: 0 to 55 °C |
|
| Temperature compensation | automatically, via a built-in temperature sensor | |
| Zero adjustment | not required | |
| Slope compensation | on the analyser/controller using analytical chlorine determination (DPD-1 method) | |
| Application range: pH value |
pH 6 to pH 8 Please note the effect of the pH value on disinfecting efficacy, corrosion and the dissociation curve! |
|
| pH dependence (loss of steepness) |
at pH 8 approx. 65 % at pH 9 approx. 95 % (starting from pH 7) |
|
| Disturbances |
ClO2: is measured using a concentration factor of 9 O₃ is detected Membrane-free chlorine electrolysis may cause malfunctions |
|
| Compressive strengthg |
pabs max. 2 bar prel max. 1 bar No pressure fluctuations permitted; pressureless operation recommended |
|
| Materials | semi-permeable membrane, PVC-U | |
| Dimensions |
Ø 25 mm, Length 220 mm (Housing with a membrane cap) |
Ø 25 mm, Length 205 mm (Housing with a membrane cap) |
| Weight | approx. 125 g | |
a EN 61326-1, EN 61326-2-3.
b The product is suitable for industrial use as well as for domestic and small business use.
c Other measurement ranges available on request.
d After calibration under repeatability conditions (25 °C, pH 7.2 in drinking water), the full-scale value of the measuring range.
e Under standard test conditions (25 °C, pH 7.2 in drinking water).
f Requirement: no ice crystals in the measurement medium.
g No pressure fluctuations are permitted. Operation without pressure (atmospheric pressure) is recommended.
We recommend the following
Flow monitors for disinfection variables Membrane-covered sensors for water disinfection (e.g. free chlorine or total chlorine, ozone, chlorine dioxide, etc.) must be operated with a minimum flow rate of 15 cm/s. The flow monitor is integrated into the sample water supply line, in series with the disinfection sensor, and monitors the required minimum flow to the sensor. Below the minimum flow velocity, the sensors measure values that are too low. This can cause a connected control system to dangerously overdose or underdose. Above the minimum incident flow velocity, the measuring signal is only slightly influenced by the incident flow velocity. The flow monitor consists of a flow body, a needle valve insert for flow regulation and an inductive proximity switch, which is controlled by a float in the medium flow. When the minimum flow velocity is reached or exceeded, the float rises and the contact of the inductive proximity switch switches. The contact can be used, for example, to control a binary input of the controller for standard signals, JUMO AQUIS 500 AS. If the flow is too low, the controller is set to the ‘HOLD’ state. This prevents incorrect dosing. Areas of application Flow monitoring when using sensors for free chlorine, chlorine dioxide, ozone, hydrogen peroxide or peracetic acid