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Temperature andhumidity sensor introduction
Mine temperatureand humidity sensor is controlled by single chip microcomputer intelligentcomposite sensor. The sensor using the Ann circuit design, suitable for thecoal mine or environment with explosion danger on the ground, to mine coal faceor a mining area, in the return air temperature and humidity for continuousdetection.The sensor adopts imported sensors, has a high detection sensitivity,good stability, wide measurement range, good compatibility and nonlinearcorrection, liquid crystal display, etc.
Temperature andhumidity sensor parameter
Measuring range:
Temperature: 0 ~100 ℃, humidity: 0 ~ 100% RH.
The basic error
a) shows theerror of ≤ ± 2.5% (FS); humidity ≤ ± 8 (FS).
b)output error ≤± 2.5% (FS); humidity ≤ ± 8 (FS)
Major electricalperformance Operating voltage: 9V ~ 24V DC;
Working current:≤ 100mA DC.
Maximum transmissiondistance: sensor and associated equipment of maximum transmission distance is 2km (need MHYVR type mining communications cables, cross section is not lessthan 1.5 was, R = 12.8 Ω/km, 0.06 uF/km or less C, H, 800 or less uh/km, andthe display of the device context value or output signal conversion fortemperature and humidity value shall comply with the terms of 4.4.2).
Output signalsystem (two formats available remote transmitter switch):
Frequency signaltypes: (constant-current pulse) 200 ~ 1000Hz; pulse width ≥ 0.3ms,"1" is not less than 4mA, "0" is not greater than +0.2 mA.(Load resistance 0 ~ 600Ω)
Digital-signal-type:(constant-current pulse) 1200bps; "1" is not less than 4mA,"0" is not greater than +0.2 mA. (Load resistance 0 ~ 600Ω)
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