Welcome to FES Sensor Technology - a leading company in hydrogen sensor technology
FES Sensor Technology GmbH offers high-precision hydrogen (H2)-sensors for safe hydrogen technology
Our products
Precision Hydrogen (H2) Sensors
Precision Hydrogen Sensors with Voltage Output
- H2-CNI 0V-I
- H2-CNI 0V-I ULTD
- H2-CNI 0V WR
Precision Hydrogen Sensors with 4-20 mA Transmitter
- H2-CNI 4-20MA-I
- H2-CNI 4-20MA-I ULTD
Sales by our partner ALDERS electronic GmbH
Arnoldstraße 19
47906 Kempen
Germany
Tel: +49 2152 8955-270
E-Mail:
vertrieb@alders.de
As experts in hydrogen sensor technology with many years of experience, we offer our customers innovative high-precision hydrogen sensors that are extremely insensitive to siloxanes from the ambient air. They are long-term stable and require no calibration. The special control and amplifier electronics are implemented directly in the housing.
The precision hydrogen (H2) sensors were developed for safe hydrogen technology. Typical applications of our hydrogen sensors are areas where hydrogen is produced, stored, transported and used. We offer hydrogen sensors for manufacturers of gas detection systems, industrial hydrogen leak detection, fuel cells, hydrogen laboratory applications, hydrogen vehicles and many other applications.
Our customers enjoy sophisticated consulting and can also benefit from individual requirements for specific solutions.
Of particular importance for our company are our strong partners with whom we can guarantee our customers the best product quality and service, and even better meet their individual requirements for specific solutions.
Precision Hydrogen Sensor with Voltage Output
- H2-CNI 0V-I
- H2-CNI 0V-I ULTD
Features

- Detection of hydrogen levels up to 100%
- LEL with 100 ppm resolution in air
- No sensitivity against typical catalyst poisons such as volatile siloxanes and carbon monoxide
- No cross-sensitivity against hydrocarbons such as methane and ethane
- Fast response and recovery times
- No humidity-induced base line drift
- Applicable in relative humidity (rh) between 0 % to 100 %
- Industrial temperature range from -40 to +80 °C
- High mechanical stability
- Linear output up to 100 % LEL
- Available with ultra-low thermal drift (ULTD) and test protocol
- On-board instrumentation amplifier and voltage output
- Supply voltage with reversed bias protection
Precision Hydrogen Sensor with 4-20 mA Transmitter
- H2-CNI 4-20MA-I
- H2-CNI 4-20MA-I ULTD
Features

- Accurate detection of hydrogen levels up to 100% LEL with 100 ppm resolution in air
- Negligible sensitivity against typical catalyst poisons such as volatile siloxanes and carbon monoxide
- No cross-sensitivity against hydrocarbons such as methane and ethane
- Fast response and recovery times
- Negligible humidity-induced base line drift
- Applicable in relative humidity (rh) between 0 % to 100 %
- Industrial temperature range -40 °C to +80 °C
- Linear output up to 100 % LEL
- Available with ultra-low thermal drift (ULTD) and test protocol
- 4-20 mA current-loop transmitter with reverse voltage operation and over-voltage surge protection
- Supply voltage with reversed bias protection
High-precision Hydrogen Sensor: H2-CNI I2C-E-ULTD
Features
- Detection of hydrogen levels up to 100% LEL with 0.25 % resolution in air
- Extended temperature range from -40 °C to +120 °C
- Ultralow thermal drift
- No sensitivity against typical catalyst poisons such as volatile siloxanes and carbon monoxide
- Fast response and recovery times
- No humidity-induced base line drift
- Applicable in relative humidity (rh) between 0 % to 100 %
- Linear output up to 100 % LEL
- No cross-sensitivity against hydrocarbons such as methane and ethane
- On-board digital temperature sensor and EEPROM with I2C bus connectivity
Full Digital High-precision Hydrogen Sensors:
- H2-CNI I2C-I FWB-A
- H2-CNI I2C-I FWB-B
Features
- Detection of hydrogen levels up to 12 vol- % with 100 ppm resolution in air
- Industrial temperature range from -40 °C to +85 °C • Ultralow thermal drift
- No sensitivity against typical catalyst poisons such as volatile siloxanes and carbon monoxide
- Fast response and recovery times
- No humidity-induced base line drift
- Applicable in relative humidity (rh) between 0 % to 100 %
- Linear output
- No cross-sensitivity against hydrocarbons such as methane and ethane
- Full Wheatstone bridge (FWB) configuration, including a digital rheostat with a nonvolatile memory for offset adjustment
- Available as advanced version FWB-A and basic version FWB-B with adjustable precision voltage source for bridge excitation (FWB-A only), programmable gain amplification (PGA), 16-bit analog to-digital converter, on-board digital temperature sensor, and a 1K EEPROM, all of them with I2C®bus connectivit
ATEX/IECEx certified housing for H2-CNI 0V-I and H2-CNI 0V-I ULTD hydrogen sensors
- ATEX Certified II 2 G Ex db IIC T4 Gb
- IECEx Certified Ex db IIC T4 Gb
- Ta = -20 °C to +60 °C
According to customer requirements we offer an ATEX/IECEx certified stainless steel housing, specifically designed for our hydrogen sensor by our premium partner Dynament. The combination of the hydrogen sensor H2-CNI-I (ULTD) and the ATEX/IECEx certified sensor housing makes industrial application of hydrogen reliable and safe in hazardous areas zone 1 and zone 2.
The evaluation kit offers you the possibility of a quick start for computer control, safety monitoring as well as acquisition of analogue or digital signals. The electronics is implemented with a precise, drift-free instrumentation amplifier with programmable gain and a 16-bit analog-to-digital converter. It also contains a 1K-bit EEPROM for storing settings and three switchable LEDs (blue, orange, red) as optical signals for different H2 levels. It is operated via a 1-wire bus connection with the LabVIEW® based software SensorControl running on a personal computer.
