MTCS2601 Thermal - Conductivity Gas Sensor Suitable For Primary Pressure Control In Harsh Environments 

Principle:

The MTCS2601 gas sensor is based on the Pirani principle, which is a physical principle without chemical reaction. It works based on the change of gas thermal conductivity. The heat flow from the heating resistor on the insulating dielectric film to the cold part of the device depends on the gas conductivity. By measuring the signal of the heating part and the "cold" part of the device at room temperature, the gas concentration can be obtained.

Features:

• It is a thermal - conductivity sensor for primary vacuum measurement.
• Housed in a SMD ceramic package, and can be provided in tape - and - reel packaging.
• With small dimensions, it is suitable for measurement in very small volumes, and the sensor gas volume is ultra - small, such as < 0.1 cm³.
• Low power consumption, with an operating power consumption of < 6 mW.
• Short time constants and ultra - fast response time, which is < 50 ms.
• It has an optimal sensitivity in the range of 10⁻² to 10² mbar, and the range can be extended to 10⁻⁴ to 1 atm.
• The measurement range is from 10⁻⁴ to 1000 mbar, with excellent reproducibility.
• It has temperature compensation, and the compensation and heating resistors on the same silicon die are well - matched.
• Based on the physical resistive sensing principle, it has a stable and long MTBF ( > 30,000 hours).
• It is compatible with a simple constant excess temperature operation circuit.
• A gold - contact version is available upon request for corrosive gas environments

Application:

• It is an excellent choice for size - critical leakage OEM detectors or miniature vacuum gauges based on the Pirani principle, which require ultra - low power consumption, long - term operation, and no maintenance.
• Suitable for primary pressure control in harsh environments, as well as the detection of gas leakage, moisture, or intrusion in closed - volume systems. It can be easily installed in pressure valves or directly in vacuum pipes or systems, such as small mechanical pumping systems, vacuum pumps, and analytical instruments. It can also be used for leakage detection to monitor the integrity of closed - system or instruments under a specific pressure, and can detect defects such as corrosion or box opening.