Shutter box air temperature and humidity sensor

⊙ Overview: The core part of the outdoor temperature and humidity sensor consists of a set of highly integrated temperature and humidity sensor chips, all of which are fully calibrated digital output chips

⊙ Overview

The core part of the outdoor temperature and humidity sensor consists of a set of highly integrated temperature and humidity sensor chips, all of which are fully calibrated digital output chips. Lightweight louver boxes can prevent direct radiation from the sun and reflected radiation from the ground, protecting the internal instruments from strong winds, rain, snow, and other factors. And its special surface treatment and structural design enable the sensing part of the instrument to be appropriately ventilated, truly sensing changes in environmental factors such as external air temperature and humidity, carbon dioxide, etc.

This product adopts CMOSens patented technology to ensure high reliability and excellent long-term stability. The sensor includes a capacitive polymer humidity sensitive element and a temperature sensitive element made of bandgap material, which are designed on the same chip as a 14 bit A/D converter and a serial interface circuit.

This sensor has excellent quality, ultra fast response, strong anti-interference ability, and high cost-effectiveness. Each sensor chip is calibrated in an extremely precise constant temperature chamber, using a mirror condensation dew point meter as a reference. The calibration coefficients obtained through calibration are stored in the OTP memory of the chip itself in program form. By using a two-wire serial interface and internal voltage adjustment, peripheral system integration becomes fast and simple.

⊙ Scope of application

This is widely used for measuring temperature and humidity in agriculture, forestry, meteorological environment, storage, greenhouse, environmental protection, meteorological stations, ships, docks, and other fields.

⊙ Technical parameters

Power supply: 12-24V DC

Signal output: voltage 0.4-2V, current 4-20mA, RS485

Power consumption: 5ma

current mode	temperature 4～20mA	correspond to -40～60℃	Accuracy: ± 0.2 ℃
Voltage type	temperature 0.4～2V
current mode	humidity 4～20mA	correspond to 0～***	Accuracy: ± 3%
Voltage type	humidity 0.4～2V

Communication method: 485 communication, transmission distance<1000 meters

Communication speed: 9600, n,8,1

Communication protocol: MODBUS protocol

⊙ Functional Features

Small size, light weight, easy installation

High measurement accuracy, reliable performance, ensuring normal operation.

Strong anti-interference ability

Long service life

Fast response speed and high data transmission efficiency.

⊙ Definition of Line Color

line color	red	Huang	blue	Green/Black
definition	positive power terminal	temperature 485A	humidity 485B	negative

(Temperature value=Temperature return value/10-40, Temperature return value=0x0275)

(Humidity value=Humidity return value/10, Humidity return value=0xC0)

D9 01: CRC verification value.

⊙ Maintenance and upkeep

This instrument is a precision electronic product, and proper maintenance and upkeep can help protect its performance and extend its service life.