This document is 4PH CiTiceL®'s performance characteristics, including nominal range, maximum overload, expected operating life, output signal resolution, temperature range, pressure range, pressure coefficient, T90 response time, relative humidity range, typical baseline range (pure air), maximum zero shift, long-term output drift, recommended load resistor, bias voltage, repeatability and output linearity.
The 4PH phosphine sensor from SUNSTAR is a three‑electrode gas detector designed for safety monitoring of phosphine. It provides a nominal detection range of 0‑5 ppm and can tolerate up to 20 ppm overload. The sensor is calibrated for a temperature range of –20 °C to +50 °C and operates at atmospheric pressure with a ±10 % tolerance.
Performance data are based on tests at 20 °C, 50 % RH and 1013 mBar. The device has an expected operating life of two years in air, a bias voltage that is not required, and a linear output signal of 1.7 + 0.3 HAP ppm. Cross‑interfering gases such as arsine, sulphur dioxide, silane, diborane, germane and carbon monoxide are listed with typical response levels. This manual is written in Chinese.
| Expected Operating Life | Two years in air |
|---|---|
| Temperature Range | –20 °C to +50 °C |
| Pressure Range | Atmospheric ±10 % |
| Bias Voltage | Not required |
| Response Time (Ts) | < 80 seconds |
It is rated for two years of operation in air.
The sensor works between –20 °C and +50 °C.