Safeguard Analytics
Product Data Sheet
January 2026

Model SA2-CH4-MEMS (METHANE)

Smart Sensor Modules

Model SA2-CH4-MEMS smart sensor modules are designed to detect and monitor methane in ambient air. The modules consist of a microelectromechanical systems (MEMS) gas detection sensor and a micro-processor-based signal conditioning circuit. Both are housed in a metallic enclosure fitted with gold plated connecting pins. When used with any Safeguard Analytics gas detection transmitter, no calibration is necessary, making the SA2-CH4-MEMS ready for operation when installed in any Safeguard Analytics transmitter.

Gas Type

Range of Sensitivity

Serial Number

Calibration Details

- last zero cal date

- last span cal date

SA2-CH4-MEMS SA2 smart sensor module

Calibration Level Configuration

Alarm Point Configuration

Environmental Data / Compensation

"The Smart Sensor Module" is factory programmed for a specific range of sensitivity. On power up, gas type, measurement range, and previous zero and span calibration data points are read by the transmitter, facilitating a fully automated startup. When used with any Safeguard Analytics gas detection transmitter, calibration may be performed on site or remotely, and the module transported to the point of installation pre-calibrated and ready for operation.

Specifications1

Sensor TechnologyMEMS
Detection MethodDiffusion
Sensitivity Options50 ppm to 50,000 ppm
Resolution1 ppm
Response TimeT50 less than 10s, T90 less than 30s
Accuracy±10% above 300 ppm
Input Voltage (Direct)3.3 VDC
Power Consumption< 50 milliwatts
Signal OutputI²C Protocol
Temperature Range-40 °C to +70 °C
Humidity Range0% to 99% non-condensing
Pressure Range1 atmosphere ± 0.1 atm
Warranty5 Years

1 Specifications subject to change without notice.

2 For most accurate bump test results, use a gas mixture consisting of 1% methane with real air (1% methane, 20% oxygen, 0.9% argon, 0.04% CO2, balance nitrogen 78.06%).

Order Guide

Model SA2-CH4-MEMS-50K
50-50,000 ppm (50 ppm MDL)
www.safeguardanalytics.com|info@safeguardanalytics.com
Pricing quoted per project

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