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
H2-CNI I2C-E-ULTD is a calorimetric hydrogen sensor with a catalytically highly active and siloxane-resistant sensor element and is based on a non isothermal calorimetric operation principle. It contains a digital temperature sensor and an EEPROM for an advanced control of sensor characteristics in a wide temperature range of -40 to +120°C. As a result of high precision adjustment, the thermal drift of the zero-signal is very small.
Pin 3 SCL line of I2C bus
Pin 4 Bridge excitation voltage connected to 1st junction of reference sensing element
Pin 5 Junction between active sensor element and reference element
Pin 6 1st junction of sensing element
Pin 7 I2C ground
Pin 8 SDA line of I2C bus
Pin 9 Supply voltage of internal electronics