HM1520 Datasheet, PDF (3/4 Pages) Humirel – RELATIVE HUMIDITY MODULE

TECHNICAL DATA
IMPORTANT NOTICE : HM1520 is based on HS1101 capacitive sensor and thus is fully
useable on a large range of relative humidity ( 1 to 99% RH). In that range, HM1520 presents a
typical accuracy of +/-5% RH at 55% RH.)
However HM1520 is a dedicated module for humidity measurements at low Relative Humidity levels.
Thus, HM1520 is also well adapted to measure water concentrations (ppm) or low dew points
when associated with an ambient temperature probe.
HM1520 features an optimized accuracy for water concentration below 6000ppm water or 0°C dew
point at 23°C (equivalent to 20% RH) .
TYPICAL OUTPUT of HM1520 when measuring
water concentration at ambient temperature of 23°C :
ppm
Vout (mV)
ppm
Vout (mV)
0
3025
1269
275
1013
3300
1294
550
1038
3570
1320
825
1064
3850
1346
1100
1089
4120
1371
1375
1115
4395
1397
1650
1141
4670
1422
1925
1166
4945
1448
2200
1192
5220
1474
2470
1217
5495
1499
2750
1243
ppm_water = 10.75 V_out - -10615 with V_out in mVolts
TYPICAL OUTPUT of HM1520 when measuring
dew point at ambient temperature of 23°C :
°C
Vout (mV)
°C
Vout (mV)
-9
1269
-36
1013
-7.8
1294
-29
1038
-6.8
1320
-24
1064
-5.8
1346
-21
1089
-4.9
1371
-18.5
1115
-4.1
1397
-16
1141
-3.2
1422
-14.5
1166
-2.5
1448
-13
1192
-1.6
1474
-11.5
1217
-1.1
1499
-10
1243
Humirel Sensor Device Data / HPC009-20 RevA December 2000
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