Phosphine (PH3) Gas Sensor, 0-20ppm

PH3 gas sensor with 0-20ppm detecting range. Precision is ±5%FS, resolution is 0.1ppm. Can be operated with electric heat unplugging, factory accurate calibration, the use of no need to re-calibrate. It can be used for phosphine detector, industrial site phosphine gas detection, intelligent municipal phosphine detection, electric power phosphine detection.

Module Features

• Supports electric hotplugging and unplugging for seamless operation.
• Comes factory-calibrated with high accuracy, eliminating the need for recalibration before use.
• Provides both simultaneous digital (UART) and analog outputs for enhanced usability.
• Utilizes the standard MODBUS communication protocol for easy integration.
• Compatible with various sensors, including infrared, electrochemical, catalytic, semiconductor, and others.

Specification

Structure

Note: Tolerance range ±0.25mm

Working Principle

The signal of the gas sensor is amplified and filtered, and then the microprocessor performs theoretical calculations on the signal and outputs a digital signal. For different sensors, the filtering and amplifying circuits are also different.

Application

Tips: Sensor Shows Constant Zero or Maximum Reading

Possible Causes

• Sensor saturation
• Faulty sensor or circuit
• Blocked sensor

Solutions

• Check for the presence of high concentrations of gas that might saturate the sensor, and ventilate the area if necessary.
• Inspect the sensor and associated circuitry for faults.
• Ensure the sensor is not blocked by any physical obstruction.