[KM37V20]  Pipeline temperature and humidity sensor voltage output

  KM37V20 using the standard ,easy access to PLC,DCS and other instruments or systems for monitoring temperature 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,DC0~5V/10V,ZIGBEE,Lora,WIFI,GPRS and other output methods.

Technical Parameters

Technical parameterParameter value
BrandKLHA
Temperature measuring range-30℃~80℃
Temperature measuring accuracy±0.5℃ @25℃
InterfaceRS485/4-20mA/DC0-5V/DC0-10V
PowerDC12~24V 1A
Running temperature-40~80°C
Working humidity5%RH~90%RH

Product Selection

    Product DesignRS485,4-20mA,DC0-5V,DC0-10VMultiple output methods, the products are divided into the following models depending on the output method.
Product model output method
KM37V2BRS485总线
KM37V2M4-20mA
KM37V2V5DC0-5V
KM37V2V10DC0-10V

Product Size

KM37V20

How to wiring?

KM37V20

KM37V20

KM37V20

Why choose this product?

KM37V20

KM37V20

KM37V20

KM37V20

Application solution

KM37V20

KM37V20

KM37V20

KM37V20

How to use?

KM37V20

Communication Protocol

    The product uses RS485 MODBUS-RTU standard protocol format, all operation or reply commands are hexadecimal data. The default device address is 1 when the device leaves the factory, and the default baud rate is 9600,8,n,1 .
1. Read data (function code 0x03)
    Inquiry frame (hexadecimal), sending example: query 1 data of 1# device, the upper computer sends the command: 01 03 00 00 00 01 84 0A .
Address Function Code Start Address Data Length Check Code
010300 0000 0184 0A
    For the correct query frame, the device will respond with data: 01 03 02 00 79 79 A6 , response format:
Address Function Code LengthData 1Check Code
0103 0200 79 79 A6
    Data description: The data in the command is hexadecimal, take data 1 as an example, 00 79 is converted to decimal value as 121, assuming the data magnification is 100, then the real value is 121/100=1.21, Others and so on.
2. Common data address table
Configuration Address Register Address Register Description Data Type Value Range
4000100 00temperatureRead Only0~65535
4010100 64Model CodeRead/Write0~65535
4010200 65 total number of measuring points read/write 1~20
4010300 66device addressread/write1~249
4010400 67baud rateread/write0~6
4010500 68communication moderead/write1~4
4010600 69protocol typeread/write1~10

  For example, the range is 0~30℃, 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
40.0(30-0)*(4-4)÷(20-4)+0
51.9(30-0)*(5-4)÷(20-4)+0
63.8(30-0)*(6-4)÷(20-4)+0
75.6(30-0)*(7-4)÷(20-4)+0
87.5(30-0)*(8-4)÷(20-4)+0
99.4(30-0)*(9-4)÷(20-4)+0
1011.3(30-0)*(10-4)÷(20-4)+0
1113.1(30-0)*(11-4)÷(20-4)+0
1215.0(30-0)*(12-4)÷(20-4)+0
1316.9(30-0)*(13-4)÷(20-4)+0
1418.8(30-0)*(14-4)÷(20-4)+0
1520.6(30-0)*(15-4)÷(20-4)+0
1622.5(30-0)*(16-4)÷(20-4)+0
1724.4(30-0)*(17-4)÷(20-4)+0
1826.3(30-0)*(18-4)÷(20-4)+0
1928.1(30-0)*(19-4)÷(20-4)+0
2030.0(30-0)*(20-4)÷(20-4)+0
    As shown in the above formula, when measuring 8mA, current current is 11.5℃。
  For example, the range is 0~30℃, the analog output is 0~5V DC0-5Vvoltage signal, temperature and DC0-5Vvoltage 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 DC0-5Vvoltage output range upper limit, B1 is the lower limit, X is the currently read temperature value, and C is the calculated DC0-5Vvoltage value. The list of commonly used values is as follows:
DC0-5Vvoltage(V)temperatureValue (℃) Calculation Process
00.0(30-0)*(0-0)÷(5-0)+0
16.0(30-0)*(1-0)÷(5-0)+0
212.0(30-0)*(2-0)÷(5-0)+0
318.0(30-0)*(3-0)÷(5-0)+0
424.0(30-0)*(4-0)÷(5-0)+0
530.0(30-0)*(5-0)÷(5-0)+0
    As shown in the above formula, when measuring 2.5V, current DC0-5Vvoltage is 15℃。
  For example, the range is 0~30℃, the analog output is 0~10V DC0-10Vvoltage signal, temperature and DC0-10Vvoltage 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 DC0-10Vvoltage output range upper limit, B1 is the lower limit, X is the currently read temperature value, and C is the calculated DC0-10Vvoltage value. The list of commonly used values is as follows:
DC0-10Vvoltage(V)temperatureValue (℃) Calculation Process
00.0(30-0)*(0-0)÷(10-0)+0
13.0(30-0)*(1-0)÷(10-0)+0
26.0(30-0)*(2-0)÷(10-0)+0
39.0(30-0)*(3-0)÷(10-0)+0
412.0(30-0)*(4-0)÷(10-0)+0
515.0(30-0)*(5-0)÷(10-0)+0
618.0(30-0)*(6-0)÷(10-0)+0
721.0(30-0)*(7-0)÷(10-0)+0
824.0(30-0)*(8-0)÷(10-0)+0
927.0(30-0)*(9-0)÷(10-0)+0
1030.0(30-0)*(10-0)÷(10-0)+0
    As shown in the above formula, when measuring 5V, current DC0-10Vvoltage is 15℃。

Product Pictures

KM37V20

Product Pictures

KM37V20

KM37V20

KM37V20

KM37V20

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BRAND: KLHA

TYPE: KM37V20

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