Reliable online measurement of hydrogen peroxide with DULCOTEST sensors.
You have the choice of three types of sensor for applications with different requirements with our DULCOTEST sensors for hydrogen peroxide Due to its complete biodegradability, hydrogen peroxide is a disinfectant and oxidising agent ... more in the glossary (H2O2): PER1, PEROX H2.10 P and PEROX H 3E.
The PER1-mA sensor is resistant to contaminated water and can be used in water with a temperature of up to 50 °C. It is a compact sensor with a built-in transducer and temperature correction, and has a measuring range Defined measurable range within which the errors in a measured variable remain within defined limits. more in the glossary of up to 100,000 mg/l.
The PEROX H2.10 P sensor type displays no cross-sensitivity to chlorine and, with its fast response time and separate temperature measurement, can be used to control fast processes in clear water, even with the temporary absence of hydrogen peroxide Due to its complete biodegradability, hydrogen peroxide is a disinfectant and oxidising agent ... more in the glossary.
The PEROX H 3E sensor with a built-in transducer and 3-electrode system shares the benefits of the PEROX H2.10 P sensor and can also be used for reliable measurement above 0.2 ppm H2O2 as well as being suited to moderately contaminated water.
Your benefits
- Precise, real-time amperometric measurement for efficient process control (short response time)
- Amperometric measuring eliminates interference caused by turbidity or colouration
- Stable zero point means no drift
- Temperature compensation eliminates interference caused by the influence of temperature
- Diaphragm-covered electrodes for reduced dependence on flow and cross-sensitivities
- Short run-in period for quick commissioning
Field of application
The following list of applications are general examples of generally suitable applications for this product. Please contact your local sales representative to talk about the applicable use of this product in your specific case / environment.
- Exhaust air scrubbers
- Cooling circuits:
- Groundwater remediation
- Potable water oxidation
- Process water disinfection
- Wastewater treatment (advanced oxidation)
- Wastewater monitoring e.g. in the semiconductor industry
- Chemical bleaches, e.g. paper, textiles
- Dechlorination, e.g. in chemical processes
- Landfill seepage water
- Biotechnology, greenhouses, pharmaceuticals
- Swimming pool water (active oxygen method)
Technical Details
- pH-range of 1-11 (variable), suitable for use at a constant pH value of up to pH 12 (types PER 1, PEROX H2.10 P)
- PER1 and PEROX H-3E sensor types can also be used with contaminated process media
- Maximum operating temperature of up to 50 °C (type PER 1)
Overview of sensors for hydrogen peroxide
| Features | Type
PER 1-mA |
PEROX H2.10 P |
PEROX H3 E |
| Resistance to chemicals and films (dirt, limescale, surfactants) | yes, exceptions: H2S, sulfides | limited, but resistant to H2S | Improved compared to PEROX H2.10 P |
Max. temperature
of shaft/diaphragm material | up to 50 °C
PVC-C/ silicone | up to 40 °C
stainless steel/PVDF | up to 45 °C
PVC-U/PET |
| Transducer | integrated in the shaft | must be attached to the sensor | integrated in the shaft |
| Temperature correction | integrated in the shaft
simple to use | separate Pt 100
rapid temperature correction | separate Pt 100
rapid temperature correction |
| Measuring range | Standard type: 2,000 ppm
Special types: up to 10 % | Switch on transducer
20, 200, 2,000 ppm | Various sensors
10, 50, 200, 500 ppm |
| Response time as t90 | 8 min. | < 45 s | < 45 s |
| Long-term operation without H2O2 | not possible | possible | possible |
Cross-sensitivity
Free chlorine and peracetic acid | yes | < 5 % | < 5 % |
| Interference by sulfites | no | < 30 % | < 30 % |
Hydrogen peroxide sensor PER 1-mA
Sensor for the measurement of hydrogen peroxide even in chemically contaminated and polluted water. Available with measuring ranges for medium to very high concentrations
Your Benefits
- Hydrogen peroxide as the measured variable, with measuring ranges from 20 ppm to 100,000 ppm (10%. With > 2%, as special versions) available
- Diaphragm-covered sensor minimises faults caused by changing flow or substances in the water
- Resistance to films of dirt thanks to use of a pore-free diaphragm
- Can be used in wide pH range of 1...11
- Operating temperature up to 50 °C
Measured variable | Hydrogen peroxide |
Calibration | Photometric with manual DT3B photometer |
pH-range | 1.0…11.0 |
Temperature | 0…50 °C |
Admissible temperature fluctuation | < 0.3 °K/min |
Response time sensor t90 | approx. 480 sec |
Max. pressure | 1.0 bar |
Flow | DGMa, DLG III: 30...80 l/h
BAMa: 5...60 l/h (depending on design) |
Supply voltage | 16...24 V DC (2-wire) |
Output signal | 4...20 mA temperature-compensated, uncalibrated, not electrically isolated |
Selectivity | Hydrogen peroxide selective towards sulphite |
Cross sensitivity | Ozone, chlorine dioxide, peracetic acid, chlorine, bromine |
Process integration | Bypass: open outlet or return of the sample water into the process line |
Sensor fitting | BAMa, DGMa, DLG III |
Controllers | D1C |
Typical applications | Cooling and wastewater treatment, bleaching processes, H2O2 product qualification, water with higher H2O2 concentrations of up to 100,000 ppm. |
Resistance to | Salts, acids, alkalis, surfactants, dirt films, not against hydrogen sulphide (H2S) |
Measuring principle, technology | Amperometric, 2 electrodes, diaphragm-covered |
| Measuring range | Order no. |
|---|
PER 1-mA-2000 ppm | 20.0…2,000.0 mg/l | 1022510 |
Important note: Measuring ranges up to 100,000 ppm on request
Hydrogen peroxide sensor PEROX H2.10 P-mA
Sensor for measuring hydrogen peroxide without cross-sensitivity to chlorine. It can also be used for fast control processes even with the temporary absence of hydrogen peroxide in clear water in a wide pH range of 2.5...10.
Your Benefits
- Measured variable hydrogen peroxide without cross-sensitivity to chlorine
- Diaphragm-covered sensor minimises faults caused by changing flow
- Fast processes can be controlled through the sensor’s rapid response time in conjunction with fast external temperature measurement for temperature correction
- Can be used in wide pH range of 2.5...10
- Reliable measurement even after periods of absence of hydrogen peroxide thanks to pulsed, self-regenerating measuring electrode
Measured variable | Hydrogen peroxide |
Calibration | Photometric with manual DT3B photometer |
Measuring range | 1...20, 10...200, 100...2000 mg/l, switchable |
pH-range | 2.5…10.0 |
Temperature | 0…40 °C |
Admissible temperature fluctuation | < 1 °K/min (with external T measurement) |
Response time sensor t90 | approx. 20 sec |
Min. conductivity | For measuring range 20 mg/l: 5 µS/cm
For measuring range 200 mg/l: 200 µS/cm
Up to 1,000 mg/l: 500 µS/cm
Up to 2,000 mg/l: 1 mS/cm |
Max. pressure | 2.0 bar |
Flow | DGMa, DLG III: 30...60 l/h
BAMa: 5...100 l/h (depending on design) |
Supply voltage | 16...24 V DC (three-wire system) |
Output signal | 4...20 mA not temperature-compensated, uncalibrated, not electrically isolated |
Selectivity | Hydrogen peroxide selective towards free chlorine |
Process integration | Bypass: open outlet or return of the sample water into the process line |
Sensor fitting | BAMa, DGMa, DLG III |
Controllers | DAC, D1C (without temperature correction) |
Typical applications | Exhaust air scrubbers, treatment of clear and chemically uncontaminated water, controls with the necessary very short response times |
Resistance to | Salts, acids, lyes, surfactants. |
Measuring principle, technology | amperometric, 2 pulsing electrodes, diaphragm-covered |
| Order no. |
|---|
H2O2 sensor PEROX-H2.10 P | 792976 |
PEROX transducer V1 for D1Ca | 1034100 |
PEROX Transducer V2 | 1047979 |
Hydrogen peroxide sensor PEROX H 3E-mA
Sensor for the measurement of hydrogen peroxide without cross-sensitivity to free chlorine peracetic acid. Suitable for use with fast control processes, even in moderately contaminated water, and for reliable measurement from 0.2 ppm H
2O
2Your Benefits
- Measured variable hydrogen peroxide without cross-sensitivity to free chlorine and peracetic acid
- Sensitive measuring range from 0.2 mg/l
- Fast processes can be controlled through the sensor’s rapid response time in conjunction with fast external temperature measurement for temperature correction
- Reliable measurement even after periods of absence of hydrogen peroxide thanks to pulsed, self-regenerating measuring electrode
- Low measuring range provided by a system containing 3 electrodes
- Membrane-covered sensor minimises faults caused by changing flow
- An integrated transmitter and the signal cable’s plug-in connector make for an easy installation
Measured variable | Hydrogen peroxide |
Calibration | Photometric with manual DT3B photometer |
pH-range | 2.5…8.0 |
Temperature | 0…45 °C |
Admissible temperature fluctuation | < 1 °K/min (with external T measurement) |
Response time sensor t90 | < 45 s |
Electrolytic conductivity | 0.05...50 mS/cm |
Max. pressure | 3.0 bar |
Flow | DGMa, DLG III: 30...60 l/h
BAMa: 5...100 l/h (depending on design) |
Supply voltage | 16…24 (two-wire technology) V DC |
Output signal | 4...20 mA not temperature-compensated, uncalibrated, not electrically isolated |
Electrical Connection | via a 4-pin plug on the sensor via an open-ended signal cable on the unit |
Selectivity | Hydrogen peroxide selective to free chlorine, peracetic acid, sulphite |
Process integration | Bypass: open outlet or return of the sample water into the process line |
Sensor fitting | BAMa, DGMa, DLG III |
Controllers | DAC, D1Cb (without temperature correction) |
Typical applications | Swimming pool, plant irrigation water, chlorine elimination. Can also be used for moderately contaminated water, controls with the necessary short response times and low H2O2 concentrations |
Resistance to | Salts, acids, alkalis, surfactants, dirt films |
Measuring principle, technology | amperometric, 3 pulsing electrodes, diaphragm-covered |
| Measuring range | Order no. |
|---|
PEROX H-3E-10ppm | 0.20…10.0 mg/l | 1058563 |
PEROX H-3E-50ppm | 1.0…50.0 mg/l | 1105779 |
PEROX H-3E-200ppm | 5.0…200 mg/l | 1105778 |
PEROX H-3E-500ppm | 10…500 mg/l | 1117570 |
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