H2-meTCD I2C
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
• Very low power consumption < 10 mW
• Programmable gain amplification (PGA), 16-bit analog-to-digital converter, on board digital temperature sensor, and 1K EEPROM
H2-meTCD I2C is a hydrogen sensor which is based on the thermal-conductivity-operation principle. The sensor contains a Si-based heated transducer, fabricated by anisotropic etching, and on-board electronics, including the voltage source for the transducer, a non volatile digital rheostat for adjusting the Wheatstone bridge with the transducer, a digital converter of the sensor signal with programmable gain amplifier, a digital temperature sensor and an EEPROM for an advanced control of sensor characteristics in a temperature range of -20 to +85°C. It is designed for use in a variety of applications which require accurate hydroge determinat on in nitrogen or other non oxygen-containing atmospheres.
Pin 9 +6 V positive supply voltage with respect to ground
Pin 7 Ground of the internal electronics. The pin is
electrically not connected to the housing
Pin 3 SCL Clock line of the I2C bus**
Pin 8 SDA Data line of the I2C bus**
* Numbers refer to the 9 pin-scheme of our
evaluation kits
** If connected, provide necessary pull-up resistors
to SCL and SDA (e.g. 4.7 kOhm).