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Electrochemical hydrogen sensor H2, stainless steel, up to 100 bar

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SKU: 31230.01

Manufacturer: Orbisphere

Availability: Order only

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The unique design of the polarographic sensor has proven itself in applications where it is important to know the level of hydrogen. This sensor provides fast and accurate measurements in gaseous or liquid samples, from corrosion monitoring in power generators to chemical production.

The measuring range depends on the type of membrane.

The scope of delivery includes only the sensor. Please order controller, sensor cable, flow chamber or process connection separately.

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Description Specifications Recommended products

Description

Dissolved hydrogen measurement with Orbisphere electrochemical sensor

Accurate measurement of dissolved hydrogen to 0.03 ppb provides corrosion detection capability;
Fast response allows for quick and easy data collection;
Process or portable configurations available for any application;

Membrane types for H2 sensors

Membrane	2956A	2952A	2995A	29015A
Thickness Membrane	25 µm	25 µm	12,5 25 µm	23 µm
Material	PFA	ETFE	Tedlar®	Saran
Sample temp.	-5 to 100 °C	-5 to 100 °C	-5 to 100 °C	-5 to 100 °C
Dissolved H2	0 - 75 ppb	0 - 300 ppb	0 - 3200 ppb	0 ppb - 32 ppm
Gaseous H2	0 Pa - 5 kPa	0 Pa - 20 kPa	0 Pa - 200 kPa	0 - 2000 kPa

The principle of operation of the hydrogen sensor 31230.01

In its simplest form, an electrochemical cell consists of a metal anode and a metal cathode immersed in an electrolyte solution in contact with these electrodes. The electronic circuit is connected to the anode and cathode. Through the applied voltage, current will flow between the anode and cathode. The electrodes and electrolyte are separated from the gaseous or liquid sample by a gas-permeable membrane.

In addition, the sensor includes a protective annular electrode that surrounds the center electrode of the sensor. Its role is to reduce the influence of other gases on the center electrode, increasing the stability of the analysis.

The materials used for the sensor components differ depending on the application.
The sensor head is covered with a protective cap and, in some cases, a grill to protect the membrane.

Gas, penetrating through the membrane into the cell, dissolves in the electrolyte. It reacts at the cathode, causing a measurable electrical current to flow. This current is proportional to the amount of gas entering the cell. The amount of gas entering the cell is proportional to the partial pressure of this gas in the sample outside the cell.
The result is displayed in the form of gas concentration, which can be displayed with a choice of several units according to the instrument settings.

Accessories

29010 Electrolyte for H2 sensor (50 ml)
29011 Chloridizing solution for H2 sensor (50 ml)
29781 Polishing kit for O3 and H2 sensors incl. powder 3 μm (29331) and cloth
3272X Electrochemical Hydrogen Sensor Service Kits (where X = 0 for 2952A, X = 1 for 29015A, X = 2 for 2956A, X = 3 for 2995A)

Specifications

Application area	Process control
Type	Industrial
Industry	Power generation
Parameters	Hydrogen
Measurement Range	0 - 3200 ppb H2

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