Product

Technical Parameters

Technical parameter	Parameter value
Moisture Temperature range	-30℃~80℃
Moisture Temperature accuracy	±0.5℃ @25℃
Moisture measuring range	0~100%
Moisture measuring accuracy	±3% @25℃
Communication Interface	DC4~20mA
Power	DC12~24V 1A
Running temperature	-30~80℃
Working humidity	5%RH~90%RH

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1. temperature and current computing relationship

  For example, the range is -30~60℃, 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	-30	(60-(-30))*(4-4)÷(20-4)+-30
5	-24.375	(60-(-30))*(5-4)÷(20-4)+-30
6	-18.75	(60-(-30))*(6-4)÷(20-4)+-30
7	-13.125	(60-(-30))*(7-4)÷(20-4)+-30
8	-7.5	(60-(-30))*(8-4)÷(20-4)+-30
9	-1.875	(60-(-30))*(9-4)÷(20-4)+-30
10	3.75	(60-(-30))*(10-4)÷(20-4)+-30
11	9.375	(60-(-30))*(11-4)÷(20-4)+-30
12	15	(60-(-30))*(12-4)÷(20-4)+-30
13	20.625	(60-(-30))*(13-4)÷(20-4)+-30
14	26.25	(60-(-30))*(14-4)÷(20-4)+-30
15	31.875	(60-(-30))*(15-4)÷(20-4)+-30
16	37.5	(60-(-30))*(16-4)÷(20-4)+-30
17	43.125	(60-(-30))*(17-4)÷(20-4)+-30
18	48.75	(60-(-30))*(18-4)÷(20-4)+-30
19	54.375	(60-(-30))*(19-4)÷(20-4)+-30
20	60	(60-(-30))*(20-4)÷(20-4)+-30

    As shown in the above formula, when measuring 8mA, current current is 26.5℃。

2. soil Moisture and current computing relationship

  For example, the range is 0~100%, the analog output is 4~20mA current signal, soil Moisture and current The calculation relationship is as shown in the formula: C = (A2-A1) * (X-B1) / (B2-B1) + A1, where A2 is soil Moisture 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 soil Moisture value, and C is the calculated current value. The list of commonly used values is as follows:

current(mA)	soil MoistureValue (%)	Calculation Process
4	0.0	(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	25.0	(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	50.0	(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	75.0	(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	100.0	(100-0)*(20-4)÷(20-4)+0

    As shown in the above formula, when measuring 8mA, current current is 29%。