Product Overview
The SGX Sensortech TC-1326 is a low-power, robust MEMS thermal conductivity sensor designed for detecting gases based on their thermal conductivity differences compared to air. It is particularly optimized for detecting hydrogen and methane in air, with a detection range of 0 to 100% by volume. The sensor operates on the principle of heat loss from a sensing element to the surrounding atmosphere, making it ideal for applications requiring sensitive gas detection, especially in battery-powered devices due to its low power consumption and small size. It is highly resistant to mechanical shocks and exhibits a low orientation effect.
Product Attributes
- Brand: SGX Sensortech
- Technology: MEMS Thermal Conductivity
- Material: Silicon structures, metal caps (perforated and sealed)
- Resistance to Mechanical Shocks: High
- Orientation Effect: Low
- Poisoning: Does not poison in atmospheres containing poisons such as organic silicones.
- Oxygen Requirement: Does not require oxygen to work.
Technical Specifications
| Specification | Value | Model(s) |
|---|---|---|
| Operating Mode | Continuous or cycle mode | TC-1326 |
| Bridge Supply Voltage | 2.9 to 3.1V (Polarity reversible) | TC-1326 |
| Sensor Current (at 3.0 0.1V) | 36 to 42 mA | TC-1326 |
| Minimum Sensitivity | 5 mV/% hydrogen (at 3.0 0.1V, 1% H2 in SGX test manifold) | TC-1326 |
| Zero Offset Range in Air (at 3.0 0.1V) | 20 mV max | TC-1326 |
| Response Time (t90) | Dependent on mounting type | TC-1326 |
| Maximum Heater Voltage | Specified maximum rating (Exceeding will destroy heaters) | TC-1326 |
| Operating Temperature Range | -40 to +125 C (Operation, storage, shipping) | TC-1326 |
| Humidity Range | 0 to 95%RH non-condensing | TC-1326 |
| Package Size | 5x5x2 mm (dual package) | TC-1326 |
| Input Voltages between pins B and G | 1.55 V (Absolute maximum) | TC-1326-A / TC-1326-AS |
| Internal Connections (Pins B & G) | Ohmic resistors, not polarized | TC-1326-A / TC-1326-AS |
| Reference Element Configuration | Covered with sealed metal cap, encapsulated in reference air | TC-1326-AS |
| Sensing Element Configuration | Covered with perforated metal cap for gas access | TC-1326-A |
| Application Example Circuit | Wheatstone bridge with optional instrumentation amplifier | TC-1326-A / TC-1326-AS |
| Hazardous Area Installation Note | Not assessed as a safety device | TC-1326 |
2411261432_Amphenol-TC1326-A_C3659326.pdf
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