T3401

T3401 is a Telaire’s T3400 series refrigerant leak detection sensor that can identify refrigerant gas leaks by assessing the thermal conductivity of a specific gas mixture. In the event of a refrigerant discharge, the variation in refrigerant concentration in the air results in changes in the thermal conductivity of the gas mixture which can be measured by the micro TCD sensing element. As compared to competing detection technologies, thermal- conductivity-based detection offers the benefits of superior long-term reliability and resilience in harsh operating environments. The T3400 series uses 2nd- generation MEMS thermal conductivity sensor featuring a patented “heat transfer cavity” that achieves highly sensitive and repeatable thermal conductivity measurement by eliminating possible occurrences of natural convection inside the cavity. Because thermal conductivity measurement is accomplished completely inside sensor chip, maximum miniaturization can be realized at the device level.

• R454B refrigerant gas
• Measurement range from 0 to 100%LFL
• Fast response time is less than 15s
• Long-term reliability > 15-year lifetime
• Provides modbus communication, packaged in a robust IP54 rated enclosure
• Compact size
• Incorporates a relative humidity sensor and a barometric pressure sensor for compensation
• Supply voltage range from 3.3V DC to 5.5V DC
• Maximum operating current-peak is 22mA
• Operating temperature range from -40°C to 60°C