RELATIVE HUMIDITY MODULE
HM1520LF
Compliant with RoHS recommendations
Based on the rugged HS1101LF capacitive humidity sensor, HM1520LF is a dedicated humidity transducer designed for measurements at low humidity. Direct measurement of dew point or water concentration can be easily obtained in really cost effective conditions. Direct interface with a micro-controller is made possible with the module’s linear voltage output.
MAIN FEATURES
Tubular form for through wall mounting Product free from Lead, Cr(6+), Cd and Hg Not affected by water condensation Full interchangeability Typical 1 to 1.6 Volt DC output for 0 to 20% RH at 5 V DC supply Calibrated, linear voltage for easy electronic interface Controlled temperature dependency Ratiometric to voltage supply
HUMIDITY SENSOR SPECIFIC FEATURES
No affected by long period at low humidity values Patented solid polymer structure High resistance to chemical Fast response time
MAXIMUM RATINGS
Ratings
Storage Temperature Storage Humidity Range Supply Voltage (Peak) Humidity Operating Range Temperature Operating Range
Symbol
Tstg RHstg Vs RH Ta
Value
-30 to 70 0 to 100 10 0 to 100 -40 to 60
Unit
°C % RH Vdc % RH °C
Accuracy of HM1520LF when used from 1 to 95%RH
HPC091 Rev A January 2008
TECHNICAL 1 DATA
HM1520LF
CHARACTERISTICS
( Vs=5.0Vdc, RL >1MΩ unless otherwise stated)
Characteristics
Humidity measuring range / Ta –40 to 60°C Relative Humidity Accuracy (1-20%) at 23°C Relative Humidity Accuracy at 55% RH at 23°C Voltage Supply (regulated at 5Vdc)* Nominal Output @10%RH /Ta 25°C Current Consumption Temperature coefficient (10 to 50°C and 1 to 20%RH) Humidity Average Sensitivity from 5% to 10% RH Response time ( at 63% of signal) from 5% to 10% RH Humidity Hysteresis Output impedance Sink current capability (RL = 33 kOhms) Warm up time (electronic) Humidity Resolution Long Term Stability
*Maximal power supply ramp up time to VCC should be less than 4 ms.
Symbol
RH
Min
0
Typ
±2 ±5
Max
100 ±3 5.25 1.31 4 -0.1 10 +/-1
Unit
%RH %RH %RH Vdc V mA %RH/°C mV/%RH s %RH Ω µA ms %RH %RH/Yr
Vcc Vout Icc Tcc ΔmV/RH τ Z Is tw
4.75 1.17
5 1.24 2.8 -0.05 +26
70 150 150 0.4 0.5
HM1520LF Preliminary Specification when used from 1 to 30%RH
Those equations can be used above 30% RH and allow to obtain an over all accuracy as described in page one of this document in all the humidity measuring range Temperature (in the range 0 to 50°C) does not affect HM1520LF measurement when used from 1 to 30% RH. No temperature compensation is required.
HPC091 Rev A January 2008
TECHNICAL 2 DATA
HM1520LF
Signal output from 1 to 20% RH at 23°C :
RH(%) Vout(mV) RH(%) Vout(mV) 1 2 3 4 5 6 7 8 9 10 1013 1038 1064 1089 1115 1141 1166 1192 1217 1243 11 12 13 14 15 16 17 18 19 20 1269 1294 1320 1346 1371 1397 1422 1448 1474 1499
With Vs = 5.0 Volts DC Calibration data are traceable to NIST standards through CETIAT laboratory.
IMPORTANT NOTICE :
HM1520LF is based on HS1101LF capacitive sensor and thus is fully useable on a large range of relative humidity ( 1 to 99% RH). In that range, HM1520LF presents a typical accuracy of +/-5% RH at 55% RH.) However HM1520LF is a dedicated module for humidity measurements at low Relative Humidity levels. Thus, HM1520LF is also well adapted to measure water concentrations (ppm) or low dew points when associated with an ambient temperature probe.
HM1520LF features an optimized accuracy for water concentration below 6000 ppm water or 0°C dew point at 23°C (equivalent to 20% RH).
TYPICAL OUTPUT of HM1520LF when measuring water concentration at ambient temperature of 23°C :
ppm Vout(mV) ppm Vout(mV) 275 1013 3025 1269 550 1038 3300 1294 825 1064 3570 1320 1100 1089 3850 1346 1375 1115 4120 1371 1650 1141 4395 1397 1925 1166 4670 1422 2200 1192 4945 1448 2470 1217 5220 1474 2750 1243 5495 1499
ppmwater = 10.75 Vout - -10615 with Vout in mVolts TYPICAL OUTPUT of HM1520LF when measuring dew point at ambient temperature of 23°C :
°C Vout(mV) °C Vout(mV) -36 -29 -24 -21 1013 1038 1064 1089 -9 -7.8 -6.8 -5.8 1269 1294 1320 1346 -18.5 -16 -14.5 -13 1115 1141 1166 1192 -4.9 -4.1 -3.2 -2.5 1371 1397 1422 1448 -11.5 -10 1217 1243 -1.6 -1.1 1474 1499
HPC091 Rev A January 2008
TECHNICAL 3 DATA
HM1520LF
RESISTANCE TO PHYSICAL AND CHEMICAL STRESS
- HM1520LF has passed through qualification processes of HUMIREL including vibration, shock, storage, high temperature and humidity, ESD. - Additional tests under harsh chemical conditions demonstrate good operation in presence of salt atmosphere, SO2(O.5%), H2S (0.5%), O3, NOx, NO, CO, CO2, Softener, Soap, Toluene, acids (H2SO4, HNO3, HCl), HMDS, Insecticide, Cigarette smoke, a non exhaustive list. - HM152000LF is not light sensitive.
SPECIFIC PRECAUTIONS
- HM1520LF is protected against reversed polarity. - If you wish to use HM1520LF in a chemical atmosphere not listed above, consult us.
PACKAGE OUTLINE
* Specific length available on request
Dim
Min (mm)
Max (mm)
A B C D E*
Wire
9.75 4.00 53 10.9 200
Color
10.25 4.50 55 11.4 250
Function
GROUND SUPPLY VOLTAGE OUTPUT VOLTAGE
W1 W2 W3
White Blue Yellow
ORDERING INFORMATION (MULTIPLE PACKAGE QUANTITY OF 10 PARTS) HM1520LF: HUMIDITY ANALOG VOLTAGE OUTPUT MODULE ORDERING REFERENCE: HPP805C031
SAMPLE KIT OF HM1520LF
The information in this sheet has been carefully reviewed and is believed to be accurate; however, no responsability is assumed for inaccuracies. Furthermore, this information does not conveyto the purchaser of such devices any license under the patent rights to the manufacturer. Humirel reserves the right to make changes without further notice to any product herein. Humirelmakes no warranty, representation or guarantee regarding the suitability of its product for any particular purpose, nor does Humirel assume any liability arising out of the application or useof any product or circuit and specifically disclaims any and all liability, including without limitation consequential or incidental damages. « Typical » parameters can and do vary in differentapplications. All operating parameters, including « Typical » must be validated for each customer applications by customer’s technical experts. Humirel does not convey any license under itspatent rights nor the rights of others. Humirel products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other appli-cation intended to support or sustain life, or for any application in which the failure of the Humirel product could create a situation where personal injury or death may occur. Should buyerpurchase or use Humirel products for any such unintended or unauthorized application, Buyer shall indemnify and hold Humirel and its officers, employees, subsidaries, affiliates and distribu-tors harmless against all claims, costs, damages and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of presonal injury or death associated with such unin-tended or unauthorized use, even if such claim alleges that Humirel was negligent regarding the design or manufacture of the part.Humirel is a registred trade mark of Humirel.
HPC091 Rev A January 2008
TECHNICAL 4 DATA
HM1520LF
