HTG3500 Series – Relative Humidity and Temperature Module
HTG3500 Series HPC123_K www.meas-spec.com April 2015
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Suitable for small bulk assembly
Product free from Lead, Cr (6+), Cd and Hg.
Compliant with RoHS
Full interchangeability. Better than +/-3%RH and
+/-0.25°C
Humidity calibrated within +/- 3% RH @ 55% RH
Temperature measurement through NTC direct
output
DESCRIPTION
Based on the rugged MEAS-France humidity sensor, the HTG3500 Series are dedicated humidity and
temperature plug and play transducers designed for OEM applications where reliable and accurate
measurements are needed. Direct interface with a micro-controller is made possible with the modules humidity
linear voltage and direct NTC outputs. The HTG3500 Series are designed for high volume and demanding
applications where power consumption is critical.
FEATURES APPLICATIONS
Demonstrated reliability and long term stability
Reliability not affected by repeated condensation
Automotive
Home Appliance
Printers
…
PERFORMANCE SPECS
MAXIMUM RATINGS
Peak conditions: less than 10% of the operating time.
Ratings
Symbol
Value
Unit
Storage Temperature
Tstg
-40 to +125
°C
Supply Voltage (Peak)
Vcc
20
Vdc
Humidity Operating Range
RH
0 to 100
%RH
Temperature Operating Range
Ta
-40 to +110
°C
Maximum Output Current (Peak)
Ipeak
3
mA
Maximum Power
Pd
10
mW
HTG3500 Series - Relative Humidity and Temperature Module
HTG3500 Series HPC123_K www.meas-spec.com April 2015
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ELECTRICAL CHARACTERISTICS
(@T=23°C, RL>1M unless otherwise noted)
(1) Conditions of sink current: Vout + 0.054V (3%RH) at Vout = 0.600 V (Vout min)
(2) At 1m/s air flow
* Except for low temperatures
POWER SUPPLY OPTION OF HTG3500 SERIES AT 3.3VDC OR AT 5VDC
At 3.3VDC or at 5VDC power supply, there is no measurable impact of type of powering on temperature and RH
accuracy.
NOMENCLATURE
HTG35YZ CH
Symbol
Min
Typ
Max
Unit
RH
0
100
%RH
3
5
%RH
Tcc
-0.05
-0.1
%RH/°C
t
10
s
+/-1
%RH
Z
50
I
1
mA
tw
150
ms
5
10
s
Symbol
Min
Typ
Max
Unit
R
9.9
10
10.1
kΩ
B
3346
3380
3414
K
Ta
-40
85
°C
Rn
1
%
B
1
%
τ
10
s
3 for 3,3 Volts
5 for 5 Volts
1 for Housing with screw/fastener mount capability
3 for Housing with PTFE membrane
HTG3500 Series - Relative Humidity and Temperature Module
HTG3500 Series HPC123_K www.meas-spec.com April 2015
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Specific electrical and metrological characteristics
HTG35Y3
(1) Module is ratiometric to voltage supply
(2) Maximum power supply ramp up time to VCC should be less than 20ms
HTG35Y5
(1) Module is ratiometric to voltage supply
(2) Maximum power supply ramp up time to VCC should be less than 20ms
TYPICAL PERFORMANCE CURVES
HUMIDITY SENSOR
Humidity Look-up Tables
Symbol
Min
Typ
Max
Unit
Vcc
3
3.3
3.46
Vdc
Vout
1.462
1.515
1.568
V
ΔmV/RH
-
+18
-
mV/%RH
Icc
-
1.0
1.2
mA dc
Symbol
Min
Typ
Max
Unit
Vcc
4.75
5
5.25
Vdc
Vout
2.401
2.480
2.559
V
ΔmV/RH
-
+26
-
mV/%RH
Icc
-
1.2
1.5
mA dc
HTG35Y5 Modeled Voltage Output
HTG35Y3 Modeled Voltage Output
Reference Output Values (Vcc = 5V)
In any power mode
Reference Output Values (Vcc = 3.3V)
In any power mode
RH (%)
Vout (mV)
RH (%)
Vout (mV)
10
1235
55
2480
15
1390
60
2605
20
1540
65
2730
25
1685
70
2860
30
1825
75
2990
35
1960
80
3125
40
2090
85
3260
45
2220
90
3400
50
2350
95
3530
RH (%)
Vout (mV)
RH (%)
Vout (mV)
10
690
55
1515
15
795
60
1595
20
895
65
1680
25
990
70
1765
30
1080
75
1850
35
1170
80
1940
40
1255
85
2030
45
1345
90
2120
50
1430
95
2205
POLYNOMIAL EQUATIONS
Vout = 8.43E-4 RH3 - 0.1485 RH2 + 34.16 RH + 909
RH = -1.564E-9Vout3 + 1.205E-5Vout2 + 8.22E-3Vout - 15.6
with Vout in mV and RH in %
POLYNOMIAL EQUATIONS
Vout = 5.57E-4 RH3 – 9.81E-2 RH2 + 22.55 RH + 477.2
RH = -5.38E-9 Vout3 + 2.55E-5 Vout2 + 1.9E-2 Vout - 13.5
with Vout in mV and RH in %
LINEAR EQUATIONS
Vout = 26.23 RH + 1032
RH = 0.03812 Vout – 39.36
with Vout in mV and RH in %
LINEAR EQUATIONS
Vout = 17.52 RH + 544.1
RH = 0.057 Vout – 31.0
with Vout in mV and RH in %
HTG3500 Series - Relative Humidity and Temperature Module
HTG3500 Series HPC123_K www.meas-spec.com April 2015
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Humidity error budget conditions at 23°C
HTG3500 series modules are specified for maximum accuracy measurements within 10 to 95 %RH.
Excursion out of this range (< 10% or > 95% RH, including condensation) does not affect the reliability of
HTG3500 series characteristics.
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.
RT NTC resistance in Ω at temperature T in K
RN NTC resistance in Ω at rated temperature T in K
T, TN 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 “Low power NTC measurement”.
0
0 10 20 30 40 50 60 70 80 90 100
N
TT
NT eRR
11
HTG3500 Series - Relative Humidity and Temperature Module
HTG3500 Series HPC123_K www.meas-spec.com April 2015
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Temperature Look-up Table
Temp
R
Temp
R
Temp
R
Temp
R
(°C)
(Ω)
(°C)
(Ω)
(°C)
(Ω)
(°C)
(Ω)
-40
195652
0
27219
40
5834
80
1669
-39
184917
1
26076
41
5636
81
1622
-38
174845
2
24988
42
5445
82
1578
-37
165391
3
23951
43
5262
83
1535
-36
156513
4
22963
44
5086
84
1493
-35
148171
5
22021
45
4917
85
1452
-34
140330
6
21123
46
4754
86
1413
-33
132958
7
20267
47
4597
87
1375
-32
126022
8
19450
48
4446
88
1338
-31
119494
9
18670
49
4301
89
1303
-30
113347
10
17926
50
4161
90
1268
-29
107565
11
17214
51
4026
91
1234
-28
102116
12
16534
52
3896
92
1202
-27
96978
13
15886
53
3771
93
1170
-26
92132
14
15266
54
3651
94
1139
-25
87559
15
14674
55
3535
95
1110
-24
83242
16
14108
56
3423
96
1081
-23
79166
17
13566
57
3315
97
1053
-22
75316
18
13049
58
3211
98
1026
-21
71677
19
12554
59
3111
99
999
-20
68237
20
12081
60
3014
100
974
-19
64991
21
11628
61
2922
101
949
-18
61919
22
11195
62
2834
102
925
-17
59011
23
10780
63
2748
103
902
-16
56258
24
10382
64
2666
104
880
-15
53650
25
10000
65
2586
105
858
-14
51178
26
9634
66
2509
106
837
-13
48835
27
9284
67
2435
107
816
-12
46613
28
8947
68
2364
108
796
-11
44506
29
8624
69
2294
109
777
-10
42506
30
8315
70
2228
110
758
-9
40600
31
8018
71
2163
-8
38791
32
7734
72
2100
-7
37073
33
7461
73
2040
-6
35442
34
7199
74
1981
-5
33892
35
6948
75
1925
-4
32420
36
6707
76
1870
-3
31020
37
6475
77
1817
-2
29689
38
6253
78
1766
-1
28423
39
6039
79
1716
Delta Temperature corresponding to NTC deviation (°C)
0,0
0,5
1,0
1,5
2,0
2,5
-40 -20 0 20 40 60 80 100
Temperature (°C)
Delta Temperature (°C)
0.1°C tolerance on Resistance Measurement
HTG3500 Series - Relative Humidity and Temperature Module
HTG3500 Series HPC123_K www.meas-spec.com April 2015
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Steinhart-Hart coefficients
According to the equation below, the Steinhart-Hart coefficients for the operating temperature range for
HTG3500 products thermistor are:
)ln(*)ln(*)ln(*)ln(*
1RRRCRba
T
R NTC resistance in Ω at temperature T in K
T Temperature in K
a Constant value (a= 8.61393E-04)
b Constant value (b= 2.56377E-04)
c Constant value (c= 1.68055E-07)
Temperature Interface circuit
Concerning the temperature sensor of the HTG3500 Series products, the following measuring method described
below is based on a voltage bridge divider circuit. It uses only one resistor component (Rbatch) at 1% to design
HTM2500 temperature sensor interfacing circuit.
Rbatch is chosen to be equal to NTC @25°C to get: Vout = Vcc/2 @25°C.
The proposal method connects Rbatch to Vcc (5Vdc) and NTC to Ground. It leads to a negative slope
characteristic (Pull-Up Configuration).
Temperature
(°C)
Resistance
(Ω)
Pull-Up Configuration
Vout (mV)
-40
195652
4757
-30
113347
4595
-20
68237
4361
-10
42506
4048
0
27219
3657
10
17926
3210
20
12081
2736
25
10000
2500
30
8315
2270
40
5834
1842
50
4161
1469
60
3014
1158
70
2228
911
80
1669
665
90
1268
563
100
974
444
110
758
352
W3
NTC Resistance
output
HTG3500 NTC
10k @25°C
Vout (mV)
VCC (mV)
Rbatch
10k
W1
Ground
)()( )(*)(
)(
3500
3500
HTGbatch
HTG
OUT NTCR NTCmVVcc
mVV
HTG3500 Series - Relative Humidity and Temperature Module
HTG3500 Series HPC123_K www.meas-spec.com April 2015
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CONNECTING AND MECHANICAL CHARACTERISTICS
CONNECTING CHARACTERISTICS
Connector
Type
Symbol
Overview
Housing
Connector
Pitch
Connector
Footprint
Mating
Connector*
Side
Connector
CH
1 & 3
-
JST ZHR-4
* For alternate connector type, please contact factory.
Pin Out Assignment
N°
Function
1
Ground
2
Vcc – Voltage Supply
3
NTC – Temperature
4
Vout – Humidity
HTG3500 Series - Relative Humidity and Temperature Module
HTG3500 Series HPC123_K www.meas-spec.com April 2015
8/10
MECHANICAL CHARACTERISTICS: HTG3500 SERIES PACKAGE OUTLINE
Housing 1 : HTG351ZCH (with screw/fastener capability)
Package Outline
With CH connector
Dim
Typ (mm)
A
27 ± 0.25
B
11.9 ± 0.2
C
5.7 ± 0.5
D
24.65 ± 0.25
E
Ø2.5 ± 0.2
F
6.7 ± 0.3
G
1.5 ± 0.5
H
6.8 ± 0.5
I
10.7 ± 0.5
J
13.3 ± 0.5
Housing 1 can be fixed with a M2 screw. The recommended maximum mounting torque is 0.22 Nm.
Housing 3 : HTG3535CH (with PTFE membrane)
Package Outline
with CH connector
Dim
Typ (mm)
A
27 ± 0.25
B
11.9 ± 0.2
C
5.7 ± 0.5
F
6.7 ± 0.3
.3
I
1.5 ± 0.5
J
6.8 ± 0.5
K
15.3 ± 0.5
L
18.4 ± 0.5
Color : Black
Weight : 1.8g
Color : Black
Weight : 1.5g
HTG3500 Series - Relative Humidity and Temperature Module
HTG3500 Series HPC123_K www.meas-spec.com April 2015
9/10
RESISTANCE TO PHYSICAL AND CHEMINAL STRESSES
HTG3500 Series have passed through qualification processes of MEAS-France including vibration, shock,
storage, high temperature and humidity, ESD.
HTG3500 Series contain circuits to protect its inputs and outputs against Electrostatic discharges (ESD) up to
15kV, air discharge.
HTG3500 Series are protected against EMC interferences.
HTG3500 Series are protected against reverse polarity.
Additional tests under harsh chemical conditions demonstrate good operation in presence of salt atmosphere,
SO2 (0.5%), H2S (0.5%), O3, NOx, NO, CO, CO2, Softener, Soap, Toluene, acids (H2SO4, HNO3, HCl), HMDS,
Insecticide, Cigarette smoke, a non-exhaustive list.
HTG3500 Series are not light sensitive.
ORDERING INFORMATION
HTG35YZ CH
X
Y
Z
CH
Output voltage
Housing
Voltage supply
Connector Type
5
1
3
3
5
CH
Voltage
With screw/fastener
With PTFE membrane
3,3V
5
Product
Order Reference
HTG3513CH
HPP815A533
HTG3515CH
HPP815A535
HTG3535CH
HPP815F535
Samples are 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
Tel:+33 (0)5 820.822.02
Fax:+33 (0)5.820.821.51
Sales: humidity.sales@meas-spec.com
HTG3500 Series - Relative Humidity and Temperature Module
HTG3500 Series HPC123_K www.meas-spec.com April 2015
10/10
Revision
Comments
Who
Date
F
RH LUT @3.3V updated, Steinhart-Hart equation and
temperature interface circuit added, max torque for housing 1
added, marking location area and dimensions updated,
resistance to physical and chemical stresses paragraph updated
D. LE GALL
June 09
G
Wiring characteristics updated and dimension C rectified
D. LE GALL
January 10
H
Package outline updated for PVBL and PVBS modules,
dimensions C and D rectified for housing 3, HPP references
added
D. LE GALL
December 10
I
New MEAS Template applied, updated PVBS/PVBL/CFB
connector dimension definition in Mechanical Characteristics
paragraph
D. LE GALL
January 12
J
MEAS-France contact details updated
D. LE GALL-
ZIRILLI
October 12
K
References updated
M. BITARD
November 14
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.
Mouser Electronics
Authorized Distributor
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HTG3535PVBL HPP815A535 HTG353XCH / PVBL