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Parameter pH
Measuring the pH value is a fundamental analysis in water chemistry. The pH indicates the acidity or alkalinity of a water sample and significantly affects chemical reactions, water quality, and corrosion behaviour. Our manual test kits provide fast, simple, and precise pH measurements directly on site—without the need for complex laboratory equipment.

Typical applications:
• Monitoring drinking and process water
• Control in swimming pools and aquariums
• Measurement in heating and cooling systems
• Environmental and water body analysis

Filter products

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Durognost Spezial Pufferlösung, Kunststoffflasche mit Schraubverschluss, Lösung zum Abpuffern starker Alkalinität
Durognost special buffer solution
Product number: 400016
Solution for the buffering of strongly alkaline water samples

€7.70*
Details
DUROGNOST I (0-0,1 dH_0-2 ppm_0,2F) Pulver Grenzwert-Besteck.jpg DUROGNOST I Pulver Grenzwert-Besteck Frontansicht mit Messröhrchen und Dosierlöffel
DUROGNOST® I (0-0.1 °dH / 0-2 ppm / 0.2°F) powder limit indicator
Product number: 400050
Special indicator in powder form for the rapid colorimetric determination of minimum hardness traces in the range 0-0.1 °dH, 0-1.8 ppm CaCO3  or 0-0.2 °f (French hardness).    Complete with measuring tube and spoon. Analyses: approx. 700 Measuring time: approx. ½ minute

€32.10*
Details
DUROGNOST SR Testkit, Tropfflasche mit Indikator, Röhrchen und Stopfen, Resthärtebestimmung
DUROGNOST® SR (0.5 / 0.25 °dH) limit value test kit
Product number: 400055
LIMIT VALUE TEST KIT Liquid special indicator in dropper bottle for the monitoring of softened water, set for the limit values of 0.5 and 0.25 °dH (8,9 and 4,47 ppm).  Description Complete with measuring tube and stopper  Analyses: approx. 250 Measuring time: approx. ½ minute

€15.00*
Details
DUROGNOST SR 0, Testbesteck mit Tropfflasche und Messröhrchen, zur Resthärteüberwachung
DUROGNOST® SR 0 (0.1 / 0.05 °dH) limit value test kit
Product number: 400056
LIMIT VALUE TEST KIT Liquid special indicator in dropper bottle for the monitoring of softened water, set for the limit values of 0.1 and 0.05 °dH (1,79 and 0,89 ppm).DescriptionComplete with measuring tube and stopper Analyses: approx. 250Measuring time: approx. ½ minute

€15.00*
Details
DUROGNOST_SR 1 (1 _ 0,5 dH) Grenzwert-Besteck.jpg DUROGNOST SR 1 Grenzwert-Besteck mit Tropfflasche, Messröhrchen und Stopfen, Frontansicht
DUROGNOST® SR 1 (1 / 0.5 °dH) limit value test kit
Product number: 400054
LIMIT VALUE TEST KIT Liquid special indicator in dropper bottle for the monitoring of softened water, set for the limit values of 1 and 0.5 °dH (17,9 and 8,9 ppm).  Description Complete with measuring tube and stopper  Analyses: approx. 250 Measuring time: approx. ½ minute

€15.00*
Details
DUROVAL KS 4,3, Verpackungsinhalt mit Spezial-Verbindungsstopfen, für Routineüberprüfungen
DUROVAL ® KS 4,3
Product number: 400067
Test kit for the determination of the acid capacity up to pH 4,3; Ks4,3 of all natural and industrial water samples via titration with a liquid titration agent and a pipette with accurate mmol/l calibrations.   Description Complete with measuring tube, pipette with caliitration solutionbration 0-2.0 mmol/l, special junction stopper, 8 ml indicator and 50 ml titration solution. Analyses: approx. 100 (at an average acid capacity of 1 mmol/l) Measuring time: approx. 2 minutes Accuracy: 0.05 mmol/l.    

€29.90*
Details
DUROVAL Titrationstest zur Wasserhärtemessung, Komplettset mit Reagenz und Tropfenflasche
DUROVAL® 1 drop = 0.1 °dH Drop Count Titration Test
Product number: 400007
Titration kit for the determination of water hardness via complexometric titration 1 drop corresponds to 0.1 degree of German hardness Analyses: approx. 30 (at an average hardness of 1 °dH)

€13.10*
Details
DUROVAL® 1 Tropfen = 1 °dH Tropfenzähl-Test, Verpackung mit Zubehör zur Wasserhärtebestimmung
DUROVAL® 1 drop = 1 °dH Drop Count Titration Test
Product number: 400010
Duroval Schnelltests: 1 Stück
Titration kit for the determination of water hardness via complexometric titration 1 drop corresponds to 1 degree of German hardnessAnalyses: approx. 30 (at an average hardness of 10 °dH)   This product is available in following versions:  1 pcs. (ready packed in folding box)50 pcs. neutral inlays without folding box (ready packed in measuring tube including insert and lid) Kit for 50 pcs. neutral inlays without folding box (all parts separately) 50 pcs. neutral inlays with neutral folding box (ready packed in folding box)

€13.10*
Details
DUROVAL® 1 Tropfen = 1 °dH Test, Einzel-Bausatz mit 50 Stück ohne Faltschachtel
DUROVAL® 1 drop = 1 °dH Drop Count Titration Test (50 pcs. set in parts without folding box)
Product number: 400112
Duroval Schnelltests: 50-er Bausatz ohne Schachtel
Titration kit for the determination of water hardness via complexometric titration 1 drop corresponds to 1 degree of German hardnessAnalyses: approx. 30 (at an average hardness of 10 °dH)   This product is available in following versions:  1 pcs. (ready packed in folding box)50 pcs. neutral inlays without folding box (ready packed in measuring tube including insert and lid) Kit for 50 pcs. neutral inlays without folding box (all parts separately) 50 pcs. neutral inlays with neutral folding box (ready packed in folding box)

€292.50*
Details
DUROVAL® 1 Tropfen = 1 °f Titrations-Test, Frontansicht mit Messröhrchen und Reagenzflasche, Set zur Wasserhärtebestimmung
DUROVAL® 1 drop = 1 °f Drop Count Titration Test
Product number: 400011
Duroval Schnelltests: 1 Stück
Titration kit for the determination of water hardness via complexometric titration 1 drop corresponds to 1 degree of French hardnessAnalyses: approx. 30 (at an average hardness of 10 °f)   This product is available in following versions:  1 pcs.50 pcs. neutral inlays without folding box Kit for 50 pcs. neutral inlays without folding box 50 pcs. neutral inlays with neutral folding box

€13.10*
Details
DUROVAL® 1 Tropfen = 1 °KH Tropfenzähl Titrationsbesteck, Komplettset zur komplexometrischen Wasseranalyse
DUROVAL® 1 Tr. = 1 °KH titration kit
Product number: 400015M
Titration kit for the determination of carbonate hardness via complexometric titration 1 drop corresponds to 1 carbonate hardnessAnalyses: approx. 30 (at an average hardness of 10 °KH)   This product is available in following versions:  1 pcs.50 pcs. 

€17.20*
Details
DUROVAL 1 Tropfen = 1 °dH Titrations-Test, 50 Stück im Messröhrchen ohne Faltschachtel, Frontansicht
DUROVAL® 1 Tr. = 1°dH titration kit (50 pcs. without folding box)
Product number: 400110
Duroval Schnelltests: 50 Stück ohne Schachtel
Titration kit for the determination of water hardness via complexometric titration 1 drop corresponds to 1 degree of German hardnessAnalyses: approx. 30 (at an average hardness of 10 °dH)   This product is available in following versions:  1 pcs. (ready packed in folding box)50 pcs. neutral inlays without folding box (ready packed in measuring tube including insert and lid) Kit for 50 pcs. neutral inlays without folding box (all parts separately) 50 pcs. neutral inlays with neutral folding box (ready packed in folding box)

€307.40*
Details
DUROVAL A Testbesteck 0–30 °dH, Detailaufnahme der Pipette und Indikatorflasche, präzise Wasserhärte-Messung
DUROVAL® A Test kit 0-30°dH
Product number: 400020
measuring range: 0-30 °dH
Test kit for the determination of water hardness across all hardness ranges via complexometric titration with a liquid titration agent and a pipette, accurately calibrated in °dH hardness unit.   Description Complete with measuring tube, pipette calibrated from 0-30 °dH, special junction stopper, liquid indicator and 50 ml titration solution. Analyses: approx. 100 (at an average hardness of 15 °dH) Measuring time: approx. 2 minutes Accuracy: 0.5 °dH  

€27.90*
Details
DUROVAL A Testbesteck 0-60 °f, Frontansicht der Verpackung und Inhalt, Wasserhärtebestimmung durch Titration
DUROVAL® A Test kit 0-60 °f
Product number: 400018
measuring range: 0-60 °f
Test kit for the determination of water hardness across all hardness ranges via complexometric titration with a liquid titration agent and a pipette, accurately calibrated in °f hardness unit.   Description Complete with measuring tube, pipette calibrated from 0-60 °f, special junction stopper, liquid indicator and 50 ml titration solution. Analyses: approx. 100 (at an average hardness of 26,7 °f) Measuring time: approx. 2 minutes Accuracy: 1°f    

€29.00*
Details
DUROVAL AF Testbesteck 0-60 °f, Frontansicht mit Messröhrchen und pulverförmigem Indikator
DUROVAL® AF Test kit 0-60 °f (Powder-Indicator)
Product number: 400022
Test kit for the determination of water hardness across all hardness ranges via complexometric titration with a liquid titration agent and a pipette, accurately calibrated in °f hardness unit.   Description Complete with measuring tube, pipette calibrated from 0-60 °f, special junction stopper, powder indicator and 50 ml titration solution. Analyses: approx. 100 (at an average hardness of 26,7 °f) Measuring time: approx. 2 minutes Accuracy: 1°f    

€29.00*
Details
DUROVAL AP Testbesteck 0–30 °dH, Kompaktes Titrationsbesteck zur Wasserhärtebestimmung mit Pulver-Indikator
DUROVAL® AP Test kit 0-30°dH (powder-indicator)
Product number: 400021
Test kit for the determination of water hardness across all hardness ranges via complexometric titration with a liquid titration agent and a pipette, accurately calibrated in °dH hardness unit.   Description Complete with measuring tube, pipette calibrated from 0-30 °dH, special junction stopper, powder indicator and 50 ml titration solution. Analyses: approx. 100 (at an average hardness of 15 °dH) Measuring time: approx. 2 minutes Accuracy: 0.5 °dH  

Price on request
Details
DUROVAL B Testbesteck 0-2 °dH, Messröhrchen und 50 ml Titrationslösung im Set
DUROVAL® B Test kit 0-2 °dH
Product number: 400030
Test kit for the determination of the water hardness in very soft or softened water samples via titration with a liquid titration agent and a pipette accurately calibrated in hardness units.   Complete with ...measuring tubecalibrated pipette from 0-2 °dHliquid indicator and 50 ml titration solution Analyses: approx. 100 (at an average hardness of 1 °dH) Measuring time: approx. 2 minutes Accuracy: 0,05 °dH    

€29.00*
Details
DUROVAL BP Testbesteck mit Pulver-Indikator, Frontansicht Komplettset mit Dosierpipette
DUROVAL® BP
Product number: 400031
As test kit type B, but with powder indicator and calibrated dosing pipette 0-4 ° f(french hardness).

€29.90*
Details
DUROVAL C, Testbesteck mit kalibrierter Pipette und Indikator, zur Bestimmung der Carbonathärte
DUROVAL® C
Product number: 400060
Test kit for the determination of the carbonate hardness or the m-value (acid capacity up to pH 4,3, Ks4,3) of all natural and industrial water samples via titration with a liquid titration agent and a pipette with accurate °dH and mmol/l calibrations.   Description Complete with measuring tube, pipette with calibration 0-20 °dH and 0-7 mmol/l, special junction stopper, indicator and 50 ml titration solution. Analyses: approx. 100 (at an average carbonate hardness of 10 °dH) Measuring time: approx. 2 minutes Accuracy: 0.5 °dH / 0.25 mmol/l.

€27.90*
Details
DUROVAL Chlorid Komplettbesteck zur Chloridbestimmung, Frontansicht mit Reagenzien und Zubehör, Kalibrierte Titrationspipette sichtbar
DUROVAL® Chloride
Product number: 400090
Kit for the determination of chloride contents in water.   Description Complete with all accessories and reagents. Analyses: approx. 200 Measuring time approx. 2 minutes Pipette: calibrated from 0-300 mg/l CI- Accuracy: 10 mg/l CI-  

€105.80*
Details
DUROVAL CO2, Testbesteck mit Reagenzien und Messröhrchen, zur CO2-Bestimmung im Wasser
DUROVAL® CO2
Product number: 400070
Kit for the determination of free carbonic acid in water via drop titration.   Description Complete with measuring tube, stopper and three reagents. Analyses: approx. 200 (at an average content of 100 mg/l CO2)

€47.10*
Details
DUROVAL® CPM, Frontansicht der Verpackung mit Messröhrchen und Pipette, für Wasseranalyse
DUROVAL® CPM
Product number: 400065
Test kit for the determination of the carbonate hardness, resp. the m-value (acid capacity up to pH 4.3; KS 4.3) and p-value (acid capacity up to pH 8.2; Ks 8.2) of all natural and industrial water samples via titration with a liquid titration agent and a pipette with accurate °dH and mmol/l calibrations.   Description Complete with measuring tube, pipette with calibration 0-20 °dH and 0-7 mmol/l, special junction stopper, indicators for m- and p-value and 50 ml titration solution. Analyses: approx. 100 (at an average carbonate hardness of 10 °dH) Measuring time: approx. 2 minutes Accuracy: 0.5 °dH/0.25 mmol/l

€32.10*
Details
DUROVAL KB 8,2 Heizungsfüllwasser, Analyse-Set mit Messröhrchen für Heizungswasser-Testung
DUROVAL® KB 8,2 for heating circuits
Product number: 400077
Test kit for the determination of the base capacity up to pH 8,2; KB 8,2 of all natural and industrial water samples via titration with a liquid titration agent and a pipette with accurate mmol/l calibrations.   Content: Complete with measuring tube, pipette with caliitration solutionbration 0-2.0 mmol/l, special junction stopper, 8 ml indicator and 50 ml titration solution. Analyses: approx. 100 (at an average base capacity of 1 mmol/l) Measuring time: approx. 2 minutes Accuracy: 0.05 mmol/l

€51.30*
Details
DUROVAL Sulfat SO4, Komplettes Titrationsbesteck zur Sulfatbestimmung im Wasser
DUROVAL® Sulfate
Product number: 400080
The titration pipette is calibrated from 0 to 300 mg/l SO42-. The measurement range can be expanded to double the concentration via refilling of the titration pipette and to ten-times the concentration by diluting the water sample with distilled water.   Description Complete with all reagents and accessories. Number of analyses: approx. 30 Titration pipette: calibrated 0-300 mg/l SO42- Measuring accuracy: 10 mg/l SO42- (measuring accuracy is 100 mg/l SO42- with dilution of the water sample in the ratio of 1 : 10)

€118.50*
Details
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