QRD1112C heat-conduction hydrogen sensor is used to measure the hydrogen percentage content in gas, it can be used for the decomposition rate of ammonia atmosphere in heat treatment gas nitriding furnace and for the decomposition rate of ammonia in ammonia decomposition gas production equipment.
The QRD1112C thermal‑conductivity hydrogen sensor is used to measure hydrogen percentage in gas streams and to calculate ammonia decomposition rates in heat‑treatment furnaces. It operates within a temperature range of 5‑50 °C and requires a dry, low‑dust gas flow of 0.5 L/min.
The document provides technical data such as a 0‑100 % H2 measurement range, 0‑100 mV output, and a supply voltage of 220 V ±10 %. It also details the electrical system, mounting method (four Φ5 screws), and step‑by‑step procedures for startup, zero‑point, and full‑scale calibration. This manual is written in Chinese.
| Measurement range | 0 – 100 % H₂ |
|---|---|
| Output signal | 0 – 100 mV (DC) |
| Basic error | ±2.5 % |
| Time constant | < 20 s |
| Thermal equilibrium time | < 30 min |
| Supply voltage | 220 V ±10 % |
| Supply frequency | 50 – 60 Hz |
| Input current source | 105 mA (max load 25 Ω) |
The sensor measures hydrogen from 0 % to 100 % H₂.
After a 30‑minute thermal balance, introduce zero‑standard gas and adjust the zero‑adjustment potentiometer (W1) until the output reads 0 mV.
The sensor is fixed with four Φ5 screws.
It requires a high‑precision constant current source of 105 mA, with a maximum load of 25 Ω.