Temperature and Humidity Sensor

OM-TH-A101

OM-TH-A101 precision temperature and humidity sensor incorporates a leading Swiss Sensirion integrated chip design, serving as an all-in-one smart monitoring solution for indoor temperature and humidity measurement. This product boasts an intuitive display, high precision, low cost, a sleek design, easy installation, and exceptional stability, making it ideal for meeting the temperature and humidity monitoring requirements in various sectors such as government, electrical, military, banking, telecommunications, education, healthcare, airports, railways, factories, hotels, warehouses, and transportation.

Product Features
Technical Specifications

(1) Utilizes a high-precision Swiss Sensirion digital temperature and humidity integrated chip, achieving unparalleled accuracy and stability.

(2) Features a large and high-brightness LCD display for straightforward observation and operation.

(3) Supports temperature and humidity error correction settings, allowing for easy calibration checks.

(4) Offers a modular design for hassle-free installation and maintenance.

(5) Includes an RS485 interface with standard Modbus RTU protocol for easy integration with remote monitoring systems.

(6) Features a unique air duct design to ensure precise measurement reflective of real conditions.

(7) External ports have an anti-electromagnetic interference design for enhanced reliability.

(8) Provides a broad operating voltage range (5V~16VDC), accommodating various application scenarios.

(9) Incorporates reverse power protection, ensuring the device remains unharmed in case of incorrect power connections.

Model Number	OM-TH-A101
Operating Voltage	12VDC（5V～16VDC）
Connection Interface	4P terminal block, RS485 communication, maximum communication distance 1200m
Measurement Range	Temperature	-20℃～70℃
Measurement Range	Humidity	0～100%RH
Measurement Accuracy	Temperature	±0.3°C (tested at 25°C)
Measurement Accuracy	Humidity	±3% RH (tested at 25°C)
Communication Interface	Physical Interface	RS485, terminal block
	Transmission Distance	1200m, utilizing a shielded twisted pair for effective signal integrity over long distances.
	Address Range	1-247, configurable via button press for flexible device addressing within networks.
	Communication Protocol	MODBUS-RTU
	Baud Rate	2400, 4800, 9600, 19200, 38400, 115200 selectable, with a factory default of 9600bps
	Data Format	N, 8, 1
Alarm Thresholds	Temperature	-20℃～70℃
Alarm Thresholds	Humidity	1～100%RH
EMC Ratings	EFT (burst)	differential mode ±2KV
EMC Ratings	ESD	contact discharge ±6KV, air discharge ±8KV
Dimensions	868634mm
Weight	100g
Material	ABS plastic