The NKHT-3S-A-F-TT(N) series transmitter is used to measure indoor temperature and humidity. The humidity sensor uses a humidity-sensitive capacitive element. After linearization processing by a microcontroller, it is converted into a frequency signal output, which does not require A/D conversion, facilitating direct acquisition and processing of temperature and humidity signal values by a computer. It is wall-mounted with a hidden wiring groove on the back of the transmitter.
The NKHT3S-A-F-TTCNT series transmitter measures indoor temperature and humidity and converts the readings to frequency‑output signals. It uses a humidity‑sensitive capacitor and a microcontroller for linearization, eliminating the need for an A/D converter, which allows direct computer acquisition of temperature and humidity values. The device is designed for wall‑mount installation with a hidden wiring module at the rear.
Technical specifications include humidity accuracy of ±3% RH at 25 °C (40‑60 % RH), temperature accuracy of ±0.5 °C, frequency output ranging from 0‑+50 °C (1‑1.5 kHz) and 0‑100 % RH (1‑2 kHz), a 5 V DC supply (10 mA), and an operating temperature range of –10 °C to 50 °C. The transmitter must be powered for 40 minutes before testing, and testing must be performed with the unit held upright. This manual is written in Chinese.
| Model | NKHT3S-A-F-TTCNT |
|---|---|
| Humidity Accuracy | ±3% RH @25°C, 40‑60% RH |
| Temperature Accuracy | ±0.5°C @25°C |
| Output (Temperature) | 0~+50°C → 1~1.5 kHz square wave |
| Output (Humidity) | 0~100% RH → 1~2 kHz square wave |
| Supply Voltage | 5 V DC, 10 mA |
| Operating Temperature Range | -10 °C to 50 °C |
The transmitter must be powered for 40 minutes before testing, and the test must be performed with the unit held upright.
It requires a 5 V DC supply with a current of 10 mA.
Temperature output is a square wave from 0 to +50 °C corresponding to 1‑1.5 kHz, and humidity output is a square wave from 0 to 100 % RH corresponding to 1‑2 kHz.