H2-meTCD 0-10V
Features:
• Accurate detection of hydrogen levels in air and nitrogen up to 100 vol-%
• Fast response and recovery times
• Applicable in relative humidity (rh) between 0 % to 100 %
• Temperature range -20 °C to +85 °C
• Linear output up in a 5 vol-% range
• Very low power consumption < 10 mW
• 0-10V output signal
• Supply voltage with reversed bias protection
H2-meTCD 0-10V is a hydrogen sensor for applications without oxygen and is based on a thermal conductivity operation principle. The sensor contains a Si-based heated transducer, fabricated by anisotropic etching, and onboard electronics, including a precision voltage source for the transducer, a non-volatile digital-analog converter for adjusting the Wheatstone bridge with the transducer, and a non-volatile digital potentiometer in connection with a zero-drift operational amplifier to adjust the output voltage. It is designed for use in a variety of applications which require an accurate hydrogen determination in nitrogen or other non oxygen-containing atmospheres.
Pin 1 (red marking) +12 V positive supply voltage with respect to ground
Pin 2 Sensor signal with respect to ground
Pin 3 Ground of the internal electronics. The pin
is electrically not connected to the housing
SCL Serial clock line of I2C bus, referenced to
ground (pin 3)*
SDA Serial data line of I2C bus, referenced to
ground (pin 3)*
*The sensor can be operated without connecting the I2C
bus. If connected, provide necessary pull-up resistors to
SCL and SDA (e.g. 4.7 kOhm).