HPC091 Rev A January 2008 TECHNICAL 1 DATA HM1520LF
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 reall y cost effective conditions. Direct interface with a micro-controller i s made possible with the
module’s linear voltage o utput.
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 interfa ce
Controlled temperature dependen cy
Ratiometric to voltage supply
HUMIDITY SENSOR SPECIFIC FEATURES
No affected by long period at low humidit y values
Patented solid polymer structure
High resistance to chemical
Fast response time
MAXIMUM RATINGS
Ratings Symbol Value Unit
Storage Temperature Tstg -30 to 70 °C
Storage Humidity Range RHstg 0 to 100 % RH
Supply Voltage (Peak) Vs 10 Vdc
Humidity Operating Range RH 0 to 100 % RH
Temperature Operating Range Ta -40 to 60 °C
Accuracy of HM1520LF when used from 1 to 95%RH
HPC091 Rev A January 2008 TECHNICAL 2 DATA HM1520LF
CHARACTERISTICS
( Vs=5.0Vdc, RL >1MΩ unless otherwise stated)
Characteristics Symbol Min Typ Max Unit
Humidity measuring range / Ta –40 to 60°C RH 0 100 %RH
Relative Humidity Accuracy (1-20%) at 23°C ±2 ±3 %RH
Relative Humidity Accuracy at 55% RH at 23°C ±5 %RH
Voltage Supply (regulated at 5Vdc)* Vcc 4.75 5 5.25 Vdc
Nominal Output @10%RH /Ta 25°C Vout 1.17 1.24 1.31 V
Current Consumption Icc 2.8 4 mA
Temperature coefficient (10 to 50°C and 1 to 20%RH) Tcc -0.05 -0.1 %RH/°C
Humidity Average Sensitivity from 5% to 10% RH ΔmV/RH +26 mV/%RH
Response time ( at 63% of signal) from 5% to 10% RH τ 10 s
Humidity Hysteresis +/-1 %RH
Output impedance Z 70 Ω
Sink current capability (RL = 33 kOhms) Is 150 µA
Warm up time (electronic) tw 150 ms
Humidity Resolution 0.4 %RH
Long Term Stability 0.5 %RH/Yr
*Maximal power supply ramp up time to VCC should be less than 4 ms.
Those equations can be used above 3 0% RH and allow to obtain an over all accuracy as described
in page one of this document in all the h umidity measuring range
Temperature (in the range 0 to 50°C) does not affect HM1520LF meas urement when used from 1 to
30% RH. No temperature compens ation is required.
HM1520LF Preliminary Specification when used from 1 to 30%RH
HPC091 Rev A January 2008 TECHNICAL 3 DATA HM1520LF
RH(%) 12345678910
V
out(mV) 1013 1038 1064 1089 1115 1141 1166 1192 1217 1243
RH(%) 11 12 13 14 15 16 17 18 19 20
V
out(mV) 1269 1294 1320 1346 1371 1397 1422 1448 1474 1499
ppm 275 550 825 1100 1375 1650 1925 2200 2470 2750
V
out(mV) 1013 1038 1064 1089 1115 1141 1166 1192 1217 1243
ppm 3025 3300 3570 3850 4120 4395 4670 4945 5220 5495
V
out(mV) 1269 1294 1320 1346 1371 1397 1422 1448 1474 1499
°C -36 -29 -24 -21 -18.5 -16 -14.5 -13 -11.5 -10
V
out(mV) 1013 1038 1064 1089 1115 1141 1166 1192 1217 1243
°C -9 -7.8 -6.8 -5.8 -4.9 -4.1 -3.2 -2.5 -1.6 -1.1
V
out(mV) 1269 1294 1320 1346 1371 1397 1422 1448 1474 1499
Signal output from 1 to 20% RH at 23°C :
With Vs = 5.0 Volts DC
Calibration data are traceable to NIST standards through CETIAT labora t ory.
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 :
ppmwater = 10.75 Vout - -10615 with Vout in mVolts
TYPICAL OUTPUT of HM1520LF when measuring
dew point at ambient temperature of 23°C :
HPC091 Rev A January 2008 TECHNICAL 4 DATA HM1520LF
RESISTANCE TO PHYSICAL AND CHEMICAL STRESS
- HM1520LF has passed through qualification processes of HUMIREL including vibration, shock, storage, high
temperature and humidit y, 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
ORDERING INFORMATION (MULTIPLE PACKAGE QUANTITY OF 10 PARTS)
HM1520LF: HUMIDITY ANALOG VOLTAGE OUTPUT MODULE
ORDERING REFERENCE: HPP805C031
The information in this sheet has been carefully review ed 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 regard ing the suitability of its p roduct for any particular purpose , nor d oes Humi rel assum e an y liabilit y arisin g out o f the ap plicatio n
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
differentapplication s. All operating param eters, in cluding « T ypical » must be v alidated for each cu stomer ap plications b y customer’s techni cal expert s. Humirel does n ot convey an y 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 d eath 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 cla ims, costs, damag es and expens es, and rea sonable attorney fees ar ising out of, directly or indirectly, any claim of presonal injury or death
associated wit h su ch u nin-t ended or u naut ho rized use, ev en if su ch claim a lleg es th at Hu mire l w as negligen t reg a rdin g t he d esign or manufacture of the part.Humirel is a registred trade mark
of Humirel.
Dim Min (mm) Max (mm)
A 9.75 10.25
B 4.00 4.50
C 53 55
D 10.9 11.4
E* 200 250
Wire Color Function
W1 White GROUND
W2 Blue SUPPLY
VOLTAGE
W3 Yellow OUTPUT
VOLTAGE
SAMPLE KIT OF HM1520LF
