HTF3000LF – Temperature and Relative Humidity Module
HTF3000LF HPC077 Rev J www.meas-spec.com October 2012
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• Small size product
• Compliant with RoHS recommendations and most
of Lead Free Soldering Process
• Humidity calibrated within +/-3% @55%RH at 5Vdc
• Stable, proportional frequency output from 0 to
100% RH
• High quality thermistor
DESCRIPTION
Based on the rugged HS1101LF humidity sensor, HTF3000LF is a dedicated humidity and temperature
transducer designed for OEM applications where a reliable and accurate measurement is needed. It features a
very small size for easy, cost-effective mechanical mounting. Direct interface with a micro-controller is made
possible with the module’s linear frequency output.
FEATURES
•
One of the smallest humidity/temperature
modules on the market
• High reliability and long term stability
• Not affected by water immersion
• Stable characteristics with temperature
• Part could be washed with distilled water
Humidity Sensor Specific Features
• Instantaneous de-saturation after long periods in
saturation phase
• Fast response time
• High resistance to chemicals
• Patented solid polymer structure
Temperature Sensor Specific Features
• 10kΩ +/-1% NTC temperature sensor
• Stable
• High sensitivity
APPLICATIONS
• Printers
•
HVAC controller
…
HTF3000LF - Temperature and Relative Humidity Module
HTF3000LF HPC077 Rev J www.meas-spec.com October 2012
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PERFORMANCE SPECS
MAXIMUM RATINGS
Peak conditions: less than 10% of the operating time.
ELECTRICAL CHARACTERISTICS
(Ta=23°C, Vs=5Vdc +/-5%, RL>1MΩ unless otherwise stated)
Humidity Characteristics Symbol Min Typ Max Unit
Humidity Measuring Range
RH
0
100
%RH
Relative Humidity Accuracy (0 to 100% RH) RH Refer to Chart 2 on page 3 %RH
Supply Voltage
Vs
3
5
8
Vdc
Nominal Output @55%RH (at 5Vdc)
Fout
6560
6600
6640
Hz
Current consumption (Max at 16Vdc)
Ic
0.18
1
mA
Supply Voltage Influence (3 to 7Vdc)
RH
+/
-
1
% RH
Average Sensitivity from 10% to 95%RH
∆Fout/∆RH
-
10
-
12
-
14
Hz/%RH
Humidity Hysteresis
+/
-
1
%RH
Long Term Stability
T
+
/
-
0.5
%RH/yr
Time Constant (at 63% of signal, static) 40% to 95%RH, 2m/s
τ
10
s
(Ta=25°C)
Temperature Characteristics Symbol Min Typ Max Unit
Nominal Resistance @25°C
R
10
kΩ
Beta value: B25/100
β
3346
3380
3413
Temperature Measuring Range
Ta
-
40
85
°C
Nominal Resistance Tolerance @25°C
R
N
1
%
Beta Value Tolerance
β
1
%
Response Time
τ
10
s
Ratings
Symbol
Value
Unit
Storage Temperature
Tstg
-
40 to 105
°C
Storage Humidity
RHstg
0 to 100
% RH
Supply Voltage (Peak)
Vs
16
Vdc
Humidity Operating Range
RH
0 to 100
% RH
Temperature Operating Range
Ta
-
40 to 85
°C
Temperature in °C
Operating Range
HTF3000LF - Temperature and Relative Humidity Module
HTF3000LF HPC077 Rev J www.meas-spec.com October 2012
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TYPICAL PERFORMANCE CURVES
HUMIDITY SENSOR
• Relative Humidity Accuracy of HTF3000LF @23°C
• Modeled Signal Output Equations
Fout = 7314 – 16.79*RH + 0.0886*RH² – 0.000358*RH
3
Fout in Hz and RH in %
• Modeled Reversed Output Equations
RH = 89.8*10
-10
*Fout
3
– 15.7486*10
-5
*Fout ² + 0.80945*Fout – 1009
Fout in Hz and RH in %
• Typical response look-up table
RH (%) 1 5 10 15 20 25 30 35 40 45 50
Fout (Hz) 7295 7230 7155 7080 7010 6945 6880 6820 6760 6705 6650
RH (%) 55 60 65 70 75 80 85 90 95 99
Fout (Hz) 6600 6550 6500 6450 6400 6355 6305 6260 6210 6170
Output Voltage wave form
HTF3000LF - Temperature and Relative Humidity Module
HTF3000LF HPC077 Rev J www.meas-spec.com October 2012
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• Temperature influence on HTF3000LF humidity measurement
Calibration data are traceable to NIST standards through CETIAT laboratory.
For demanding application, temperature coefficient could be compensated over operating temperature range
using following formula:
RH
corr
= RH + 0.08 * ( T – 25 )
Fout
Corr
= Fout – 0.88 * ( T – 25 )
T in °C, RH in %, Fout in Hz
TEMPERATURE SENSOR
• Typical temperature output
Depending on the needed temperature measurement range and associated accuracy, we suggest two methods
to access to the NTC resistance values.
)
11
(
N
TT
NT
eRR
−
∗=
β
R
T
NTC resistance in Ω at temperature T in K
R
N
NTC resistance in Ω at rated temperature T in K
T, T
N
Temperature in K
β Beta value, material specific constant of NTC
e Base of natural logarithm (e=2.71828)
The exponential relation only roughly describes the actual characteristic of an NTC thermistor can, however,
as the material parameter β in reality also depend on temperature. So this approach is suitable for describing a
restricted range around the rated temperature or resistance with sufficient accuracy.
For practical applications, a more precise description of the real R/T curve may be required. Either more
complicated approaches (e.g. the Steinhart-Hart equation) are used or the resistance/temperature relation as
given in tabulation form. The below table has been experimentally determined with utmost accuracy for
temperature increments of 1 degree.
Actual values may also be influenced by inherent self-heating properties of NTCs. Please refer to MEAS-France
Application Note HPC106-0 “Low power NTC measurement”.
HTF3000LF - Temperature and Relative Humidity Module
HTF3000LF HPC077 Rev J www.meas-spec.com October 2012
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• Temperature Look-up Table
Temp Rout Max Dev
Temp Rout Max Dev
Temp Rout Max Dev
(°C) (Ω) (Ω)
(°C) (Ω) (Ω)
(°C) (Ω) (Ω)
-40 195652 7921
2 24988 482
44 5086 86
-39 184917 7378
3 23951 452
45 4917 85
-38 174845 6874
4 22963 423
46 4754 83
-37 165391 6407
5 22021 396
47 4597 82
-36 156513 5974
6 21123 371
48 4446 81
-35 148171 5571
7 20267 348
49 4301 80
-34 140330 5197
8 19450 326
50 4161 79
-33 132958 4849
9 18670 305
51 4026 77
-32 126022 4527
10 17926 285
52 3896 76
-31 119494 4226
11 17214 267
53 3771 75
-30 113347 3947
12 16534 250
54 3651 74
-29 107565 3687
13 15886 233
55 3535 73
-28 102116 3446
14 15266 218
56 3423 72
-27 96978 3221
15 14674 204
57 3315 70
-26 92132 3011
16 14108 190
58 3211 69
-25 87559 2815
17 13566 178
59 3111 68
-24 83242 2633
18 13049 166
60 3014 67
-23 79166 2463
19 12554 154
61 2922 66
-22 75316 2305
20 12081 144
62 2834 65
-21 71677 2157
21 11628 134
63 2748 64
-20 68237 2019
22 11195 125
64 2666 63
-19 64991 1890
23 10780 116
65 2586 62
-18 61919 1770
24 10382 108
66 2509 60
-17 59011 1658
25 10000 100
67 2435 59
-16 56258 1553
26 9634 100
68 2364 58
-15 53650 1454
27 9284 100
69 2294 57
-14 51178 1363
28 8947 100
70 2228 56
-13 48835 1277
29 8624 99
71 2163 55
-12 46613 1197
30 8315 99
72 2100 54
-11 44506 1121
31 8018 98
73 2040 53
-10 42506 1051
32 7734 98
74 1981 52
-9 40600 985
33 7461 97
75 1925 52
-8 38791 923
34 7199 96
76 1870 51
-7 37073 865
35 6948 95
77 1817 50
-6 35442 810
36 6707 94
78 1766 49
-5 33892 759
37 6475 93
79 1716 48
-4 32420 712
38 6253 92
80 1669 47
-3 31020 667
39 6039 91
81 1622 46
-2 29689 625
40 5834 90
82 1578 46
-1 28423 586
41 5636 89
83 1535 45
0 27219 549
42 5445 88
84 1493 44
1 26076 514
43 5262 87
85 1452 43
HTF3000LF - Temperature and Relative Humidity Module
HTF3000LF HPC077 Rev J www.meas-spec.com October 2012
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QUALIFICATION PROCESS
RESISTANCE TO PHYSICAL AND CHEMICAL STRESSES
• HTF3000LF has passed through qualification processes of MEAS-France including vibration, shock,
storage, high temperature and humidity.
• Additional tests under harsh chemical conditions demonstrate good operation in presence of salt
atmosphere, SO2 (0.5%), H2S (0.5%), 03, NOx, NO, CO, CO2, Softener, Soap, Toluene, acids (H2SO4,
HNO3, HCI), HMDS, Insecticide, Cigarette smoke, this is not an exhaustive list.
• ESD: HTF3000LF is able to sustain a minimum of +/-8kV (contact discharge).
PACKAGE OUTLINE
HTF3000LF PVH
RECOMMENDED THROUGH HOLE FOOTPRINT
Dim A B C D E F K
Min 17.9 12.0 10.7 14.25 4.80 1.76 0.54
Max 18.9 13.0 11.7 14.95 5.40 3.76 0.74
Dimensions in millimeters
HTF3000LF - Temperature and Relative Humidity Module
HTF3000LF HPC077 Rev J www.meas-spec.com October 2012
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SOLDERING INFORMATION
HTF3000LF PVH: Hand soldering or wave soldering
ORDERING INFORMATION
HPP808H031 FOR HTF3000LF PVH
STORAGE: TUBE M.Q.P OF 48 PARTS; BOX M.Q.P OF 1008 PARTS (21 TUBES)
Sample kit of HTF3000LF is available through MEASUREMENT SPECIALTIES web site:
http://www.meas-spec.com/humidity-sensors.aspx
Customer Service contact details
Measurement Specialties, Inc - MEAS France
Impasse Jeanne Benozzi
CS 83 163
31027 Toulouse Cedex 3
FRANCE
Tél: +33 (0)5 820 822 02
Fax: +33(0)5 820 821 51
Sales: humidity.sales@meas-spec.com
Revision Comments Who Date
F HTF3000LF RL reference added, product storage
quantities added D. LE GALL November 07
G Mechanical dimension tolerance updated D. BEZ December 07
H Soldering information paragraph updated, chart2 improved
(poor image), HTF3000LF SMD and HTF3000LF RL
references removed
D. LE GALL January 08
I Standardized datasheet format D. LE GALL April 08
J New MEAS template, MEAS-France contact details
updated D. LE GALL-ZIRILLI October 12
The information in this sheet has been carefully reviewed and is believed to be accurate; however, no responsibility is assumed for
inaccuracies. Furthermore, this information does not convey to the purchaser of such devices any license under the patent rights to the
manufacturer. Measurement Specialties, Inc. reserves the right to make changes without further notice to any product herein. Measurement
Specialties, Inc. makes no warranty, representation or guarantee regarding the suitability of its product for any particular purpose, nor does
Measurement Specialties, Inc. assume any liability arising out of the application or use of 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 different
applications. All operating parameters must be validated for each customer application by customer’s technical experts. Measurement
Specialties, Inc. does not convey any license under its patent rights nor the rights of others.
