SONBEST SM3710M 4-20mA Current Type Duct Type Temperature and Humidity Sensor User Manual
- June 5, 2024
- SONBEST
Table of Contents
SM3710M 4-20mA Current Type Duct Type Temperature and Humidity Sensor
User Manual
File Version: V21.4.25 SM3710M using the standard DC4-20mA current output signal, easy access to PLCDCS and other instruments or systems for monitoring temperature, and humidity state quantities. The internal use of high-precision sensing core and related devices to ensure high reliability and excellent long-term stability can be customized RS232, RS485, CAN,4-20mA, DC0~5V10V, ZIGBEE, Lora, WIFI, GPRS, and other output methods.
Technical Parameters
| Technical parameter | Parameter value |
|---|---|
| Brand | SONBEST |
| Temperature measuring range | 0-50 t /-20-80t/-40-60T2 |
| Temperature measuring accuracy | ± 0.3″C @25 t |
| Range change mode | DIP switch |
| Humidity measuring range | 0-100%RH |
| Humidity accuracy | ± 3°/0RH 0251: |
| Communication Interface | DC4-20mA |
| Power | DC12-24V 1A |
| Running temperature | -40-80°C |
| Working humidity | 5%RH-90%RH |
Product SizeHow to use it?
Temperature and current computing relationship
The product comes standard with 0~50°C/-20~80°C/-40~60°C multi-range. The
default range is 0~50℃. Users can modify the range by dialing the switch. For
example, the range is 0~50℃, the analog output is 4~20mA current signal,
temperature and current The calculation relationship is as shown in the
formula: C = (A2-A1) * (X-B1) / (B2-B1) + A1, where A2 is temperature range
upper limit, A1 is the lower limit of the range, B2 is current output range
upper limit, B1 is the lower limit, X is the currently read temperature value,
and C is the calculated current value. The list of commonly used values is as
follows:
| current(mA) | temperatureValue (℃) | Calculation Process |
|---|---|---|
| 4 | 0.0 | (50-0)*(4-4)=(20-4)+0 |
| 5 | 3. | (50-0)*(5-4)=(20-4)+0 |
| 6 | 6. | (50-0)*(6-4)=(20-4)+0 |
| 7 | 9. | (50-0)*(7-4)=(20-4)+0 |
| 8 | 13. | (50-0)*(8-4)=(20-4)+0 |
| 9 | 16. | (50-0)*(9-4)=(20-4)÷0 |
| 10 | 19. | (50-0)*(10-4)=(20-4)÷0 |
| 11 | 22. | (50-0)*(11-4)=(20-4)+0 |
| 12 | 25.0 | (50-0)*(12-4)=(20-4)+0 |
| 13 | 28. | (50-0)*(13-4)=(20-4)+0 |
| 14 | 31. | (50-0)*(14-4)=(20-4)+0 |
| 15 | 34. | (50-0)*(15-4)=(20-4)+0 |
| 16 | 38. | (50-0)*(16-4)=(20-4)÷0 |
| 17 | 41. | (50-0)*(17-4)=(20-4)+0 |
| 18 | 44. | (50-0)*(18-4)=(20-4)+0 |
| 19 | 47. | (50-0)*(19-4)=(20-4)+0 |
| 20 | 50.0 | (50-0)*(20-4)=(20-4)+0 |
As shown in the above formula, when measuring 8mA, the current is 16.5℃。
2. humidity and current computing relationship
For example, the range is 0~100%RH, the analog output is 4~20mA current
signal, humidity, and current The calculation relationship is as shown in the
formula: C = (A2-A1) * (X-B1) / (B2-B1) + A1, where A2 is humidity range upper
limit, A1 is the lower limit of the range, B2 is current output range upper
limit, B1 is the lower limit, X is the currently read humidity value, and C is
the calculated current value. The list of commonly used values is as follows:
| current(mA) | humidityValue (%RH) | Calculation Process |
|---|---|---|
| 4 | 0 | (100-0)*(4-4)÷ (20-4)+0 |
| 5 | 6.3 | (100-0)*(5-4)÷ (20-4)+0 |
| 6 | 12.5 | (100-0)*(6-4)÷ (20-4)+0 |
| 7 | 18.8 | (100-0)*(7-4)÷ (20-4)+0 |
| 8 | 25 | (100-0)*(8-4)÷ (20-4)+0 |
| 9 | 31.3 | (100-0)*(9-4)÷ (20-4)+0 |
| 10 | 37.5 | (100-0)*(10-4)÷ (20-4)+0 |
| 11 | 43.8 | (100-0)*(11-4)÷ (20-4)+0 |
| 12 | 50 | (100-0)*(12-4)÷ (20-4)+0 |
| 13 | 56.3 | (100-0)*(13-4)÷ (20-4)+0 |
| 14 | 62.5 | (100-0)*(14-4)÷ (20-4)+0 |
| 15 | 68.8 | (100-0)*(15-4)÷ (20-4)+0 |
| 16 | 75 | (100-0)*(16-4)÷ (20-4)+0 |
| 17 | 81.3 | (100-0)*(17-4)÷ (20-4)+0 |
| 18 | 87.5 | (100-0)*(18-4)÷ (20-4)+0 |
| 19 | 93.8 | (100-0)*(19-4)÷ (20-4)+0 |
| 20 | 100 | (100-0)*(20-4)÷ (20-4)+0 |
As shown in the above formula, when measuring 8mA, the current is 29%RH。
Disclaimer
This document provides all information about the product, does not grant any
license to intellectual property does not express or imply, and prohibits any
other means of ranting any intellectual property rights, such as the statement
of sales terms and conditions of this product, other issues. No liability is
assumed. Furthermore, our company makes no warranties, express or implied,
regarding the sale and use of this product, including the suitability for the
specific use of the product, the marketability, or the infringement liability
for any patent, copyright or other intellectual property rights, etc. Product
specifications and product descriptions may be modified at any time without
notice.
Contact Us
Company: Shanghai Sonbest Industrial Co., Ltd
Address:Building 8,No.215 North east road,Baoshan District,Shanghai,China
Web: http://www.sonbest.com
Web: http://www.sonbus.com
SKYPE: soobuu
Email: sale@sonbest.com
Tel: 86-021-51083595 / 66862055 / 66862075 / 66861077
Sha nghai Sonbest Industrial Co., Ltd
References
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