Temperature and humidity transmitter

Wall-mounted current type temperature and humidity transmitter

The current output temperature and humidity transmitter series is ideal for environmental applications such as libraries, archives, supermarkets, production plants, industrial automation, HVAC, pharmaceutical chemicals, telecommunication rooms, environmental monitoring, clean buildings, intelligent buildings, telecommunications base stations, etc. solution.

The use of a high-quality integrated digital humidity sensor as probe ensures excellent long-term stability, low hysteresis, and strong resistance to chemical contamination. The transmitter also features excellent repeatability and ease of use. , Integrated digital temperature and humidity sensor can be replaced quickly without calibration, and the cost is lower.

1 typical application

Medical Chemical Communication Room HVAC HVAC

Environmental Monitoring Telecom Base Station Books and Archives

Clean building intelligent building supermarket, production workshop

automated industry

2 Features

*Excellent value for money, suitable for different use environments

* Humidity, temperature output range user selectable

* Long-term stability, flexibility of use

* Easy to maintain, sensor probes can be replaced quickly without calibration

3 Technical parameters

Power Supply 15-36VDC (RL<500Ω)

10-36VDC (RL<50Ω)

Relative humidity 0-100%RH

Humidity Sensor Humidity Capacitance

Humidity signal output 4-20mA (two-wire system)

Working range 0-100%RH

Accuracy ±2%RH(25°C) <±5%RH(-20-80°C)

Temperature Sensor

Temperature signal output

(Optional temperature measurement range):

0-50°C

-20-80°C

-40-60°C Current Output 4-20mA (Two Wires)

Accuracy ±0.2°C

Loss Current DC Supply Typical 4mA

Electrical connection terminal threaded joint maximum 1.5mm2

Shell / degree of protection ABS

Temperature Range Operating Temperature -40~80°C

Storage temperature -40~80°C

Specifications 100 X 80 X 30 mm 150g

Display parameters: using the highest standard display

Display Specifications: 45mm*35mm

Adaptable temperature range: -30~80 degrees Celsius

The range of viewing angles is 120 degrees horizontal and 120 degrees vertical.

Network temperature and humidity transmitter

The temperature and humidity integrated transmitter uses high-quality digital integrated sensors as probes, together with a reliable digital processing circuit, to convert the temperature and relative humidity in the environment into the corresponding standard analog signals, 4-20mA. Or 0-5V, it can reliably perform distributed monitoring with the host computer system. It has the characteristics of small size, light weight, wide range, high precision and fast response and long-term work stability, making it widely used in meteorology, national defense, scientific research, post and telecommunications, chemical industry, environmental protection, medicine, hotels, food and other materials Warehousing, HVAC, etc. Need to measure and control the temperature and humidity in the air.

4 Specifications

4. Humidity accuracy: ±3%RH (25°C);

5. Working power supply: When load resistance ≤ Ω: 12 to 36V

LCD temperature and humidity transmitter

LCD temperature and humidity transmitter

250Ω<When load resistance ≤500Ω: 18 to 36V

(Maximum load resistance: ≤ 500Ω)

6. Overall size: 100×80×30mm

Temperature and humidity integration 4 to 20mA transmitter It can simultaneously change the temperature and humidity values ​​into current value changes, and can directly connect with various standard 4~20mA input secondary instrument.

5 outstanding features

Digital calibration technology, high precision, good consistency

The power supply has no polarity intervention to avoid damage caused by wiring errors.

Standard two-wire mode, convenient wiring and compatibility

Digital calibration can be performed on-site with handheld instruments.

Reserved digital networking interface.

Note: (A and B must be connected correctly, otherwise the transmitter and the computer can not communicate properly. When long-distance transmission is required, it is recommended to use shielded twisted pair)

6 terminals and wiring definition

W2

W14. Send and receive data command format

* Host sender:

First byte Second byte Third byte Fourth byte Fifth byte Sixth byte

Device Address 0X03 0XA5 0XD2 CRCL CRCH

* Slave Receive Return:

First byte Second byte Third byte Fourth byte Fifth byte Sixth byte Seventh byte Eighth byte Ninth byte

Equipment Address 0X03 0X04 Humidity High Humidity Low Temperature High Temperature Low CRC Low CRC High

* Calculate the value of temperature and humidity: The value returned by the slave can be divided by 10. For example, if the humidity returned from the machine is 0x01, 0x52, then the value obtained by converting 0x0152 to decimal value is 338, and the value obtained with 338÷10 is the humidity value we need for 33.8 (%RH). The same applies to temperature. This is no longer mentioned.

Six, data collection and communication

1. Install <Temperature and Humidity Recorder> Software

2. Set the transmitter's address and baud rate, and use the RS232 to RS485 interface to connect the transmitter to the computer.

3. Open the installed software and follow the software instructions for the software

The address and baud rate are consistent with the transmitter's address and baud rate settings for data acquisition and communication.

7 common troubleshooting methods

The transmitter does not show whether the power supply voltage is within the rated value; check the power cord is connected correctly

Can't communicate with the computer to check whether the RS485 signal line is connected correctly; whether the baud rate code on the PCB is set to match the software window

Colorimetric method: Determination of total ammonia and ammonium salt concentration in water samples (measured as nitrogen)

Test range: 0.20-0.40-0.60-0.90-1.20-1.50 mg/l

Temperature and humidity loggers

Temperature and humidity loggers

25 test times

Water Quality Quick Test Box - The water quality test expert fully embodies the basis for rapid analysis. Whether using visual colorimetry or titration, reliable results can be quickly obtained. Like a portable laboratory, routine water quality testing can be performed in real time. Can significantly save time and costs.

8 Product Features

a. Easy to use - Visual colorimetry or titration is used to measure. The tester needs no training. Just follow the instructions.

b, fast and efficient - 2 to 10 minutes to complete a

The analysis of water samples is fast and efficient.

c, reliable results. ,

d, all reagents and accessories are built-in, no need to prepare.

e. Low cost of analysis. ,

f, small size, light weight, easy to carry.

g. Suitable for real-time water quality testing of sea and fresh water.

Applications: Water quality analysis is widely used in aquaculture, environmental analysis, wastewater discharge and treatment, industrial water, printing and dyeing, rinsing, chemicals and light industry, plating surface treatment, and swimming pools.

Features

1, the full-scale analog output linear good.
2, good consistency, long service life.
3, Wide range accuracy, good stability, small amount of annual drift.
4, fast response, low temperature coefficient.
5, good interchangeability
Working temperature: -20-60°C
Reaction time (ta) 5s
Humidity effective measurement range: 5-95 [%]
Humidity signal output corresponding range: 0-100 [%]
Humidity measurement: Under normal conditions, the drift is not greater than 1 [%]RH
Load capacity voltage type: ≥1KΩ, current type: 0-500Ω