HTG3500 SERIES
Relative Humidity and Temperature Module
SPECIFICATIONS

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
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


Demonstrated reliability and long term stability
Reliability not affected by repeated condensation
APPLICATIONS



Automotive
Home Appliance
Printers
PERFORMANCE SPECS
MAXIMUM RATINGS
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
Peak conditions: less than 10% of the operating time.
SENSOR SOLUTIONS /// HTG3500 Series HPC123_K
9/2015
Page 1
HTG3500 SERIES
Relative Humidity and Temperature Module
ELECTRICAL CHARACTERISTICS
(@T=23°C, RL>1M unless otherwise noted)
Humidity Characteristics
Symbol
Min
Typ
Max
Unit
Humidity Measuring Range
RH
0
3
100
5
%RH
Tcc
-0.05
-0.1
%RH/°C
t
10
s
+/-1
%RH
Relative Humidity Accuracy (10% to 95%RH)
Temperature coefficient (10°C to 50°C)
Recovery time after 150 hours of condensation
Humidity hysteresis
%RH
Output impedance
Z
50

Sink current capability (RL_Min = 8 kOhms) (1)
I
1
mA
Warm up time (90% of signal)
Time Constant (at 63% of signal) 33%RH to 75%RH
(1)
(2)
tw
(2)
150

ms
5
10
s
Conditions of sink current: Vout + 0.054V (3%RH) at Vout = 0.600 V (Vout min)
At 1m/s air flow
Temperature Characteristics*
Symbol
Min
Typ
Max
Unit
R
9.9
10
10.1
kΩ
Beta value : B25/50
B
3346
3380
3414
K
Temperature measuring range
Ta
-40
85
°C
Nominal Resistance Tolerance at 25°C
Rn
1
%
B value tolerance
B
1
%
Time Constant
τ
10
s
Nominal resistance @ 25°C
* 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
3 for 3,3 Volts
5 for 5 Volts
1 for Housing with screw/fastener mount capability
3 for Housing with PTFE membrane
SENSOR SOLUTIONS /// HTG3500 Series HPC123_K
9/2015
Page 2
HTG3500 SERIES
Relative Humidity and Temperature Module
Specific electrical and metrological characteristics
HTG35Y3
Characteristics
Voltage Supply (1) (2)
Nominal Output @55%RH
Humidity Average Sensitivity
Current consumption
(1)
(2)
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
Min
Typ
Max
Unit
Module is ratiometric to voltage supply
Maximum power supply ramp up time to VCC should be less than 20ms
HTG35Y5
Characteristics
Voltage Supply
(1) (2)
Nominal Output @55%RH
Humidity Average Sensitivity
Current consumption
(1)
(2)
Symbol
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
Module is ratiometric to voltage supply
Maximum power supply ramp up time to VCC should be less than 20ms
TYPICAL PERFORMANCE CURVES
HUMIDITY SENSOR

Humidity Look-up Tables
HTG35Y5 Modeled Voltage Output
Reference Output Values (Vcc = 5V)
In any power mode
RH (%)
Vout (mV)
RH (%)
Vout (mV)
10
55
1235
2480
15
60
1390
2605
20
65
1540
2730
25
70
1685
2860
30
75
1825
2990
35
80
1960
3125
40
85
2090
3260
45
90
2220
3400
50
95
2350
3530
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 %
LINEAR EQUATIONS
Vout = 26.23 RH + 1032
RH = 0.03812 Vout – 39.36
with Vout in mV and RH in %
SENSOR SOLUTIONS /// HTG3500 Series HPC123_K
HTG35Y3 Modeled Voltage Output
Reference Output Values (Vcc = 3.3V)
In any power mode
RH (%)
Vout (mV)
RH (%)
Vout (mV)
10
55
690
1515
15
60
795
1595
20
65
895
1680
25
70
990
1765
30
75
1080
1850
35
80
1170
1940
40
85
1255
2030
45
90
1345
2120
50
95
1430
2205
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 = 17.52 RH + 544.1
RH = 0.057 Vout – 31.0
with Vout in mV and RH in %
9/2015
Page 3
HTG3500 SERIES
Relative Humidity and Temperature Module

Humidity error budget conditions at 23°C
0
10
20
30
40
50
60
70
80
90
100
0
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  RN  e
RT
RN
T, TN
β
e
1 1 

 T TN 
  
NTC resistance in Ω at temperature T in K
NTC resistance in Ω at rated temperature T in K
Temperature in K
Beta value, material specific constant of NTC
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”.
SENSOR SOLUTIONS /// HTG3500 Series HPC123_K
9/2015
Page 4
HTG3500 SERIES
Relative Humidity and Temperature Module
Temperature Look-up Table
Temp
(°C)
R
(Ω)
Temp
(°C)
R
(Ω)
Temp
(°C)
R
(Ω)
Temp
(°C)
R
(Ω)
-40
-39
-38
-37
-36
-35
-34
-33
-32
-31
-30
-29
-28
-27
-26
-25
-24
-23
-22
-21
-20
-19
-18
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
195652
184917
174845
165391
156513
148171
140330
132958
126022
119494
113347
107565
102116
96978
92132
87559
83242
79166
75316
71677
68237
64991
61919
59011
56258
53650
51178
48835
46613
44506
42506
40600
38791
37073
35442
33892
32420
31020
29689
28423
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
27219
26076
24988
23951
22963
22021
21123
20267
19450
18670
17926
17214
16534
15886
15266
14674
14108
13566
13049
12554
12081
11628
11195
10780
10382
10000
9634
9284
8947
8624
8315
8018
7734
7461
7199
6948
6707
6475
6253
6039
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
5834
5636
5445
5262
5086
4917
4754
4597
4446
4301
4161
4026
3896
3771
3651
3535
3423
3315
3211
3111
3014
2922
2834
2748
2666
2586
2509
2435
2364
2294
2228
2163
2100
2040
1981
1925
1870
1817
1766
1716
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
1669
1622
1578
1535
1493
1452
1413
1375
1338
1303
1268
1234
1202
1170
1139
1110
1081
1053
1026
999
974
949
925
902
880
858
837
816
796
777
758
Delta Temperature corresponding to NTC deviation (°C)
2,5
Delta Temperature (°C)
2,0
1,5
1,0
0,5
0,0
-40
-20
0
20
40
60
80
100
Temperature (°C)
0.1°C tolerance on Resistance Measurement
SENSOR SOLUTIONS /// HTG3500 Series HPC123_K
9/2015
Page 5
HTG3500 SERIES
Relative Humidity and Temperature Module
Steinhart-Hart coefficients
According to the equation below, the Steinhart-Hart coefficients for the operating temperature range for HTG3500
products thermistor are:
1
 a  b * ln( R)  C * ln( R) * ln( R) * ln( R)
T
R
T
a
b
c
NTC resistance in Ω at temperature T in K
Temperature in K
Constant value (a= 8.61393E-04)
Constant value (b= 2.56377E-04)
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).
VCC (mV)
Rbatch
10k
W3
NTC Resistance
HTG3500 NTC
Voutoutput
(mV)
10k @25°C
W1
Ground
VOUT (mV ) 
Vcc (mV ) * NTC HTG 3500 ()
Rbatch ()  NTC HTG 3500 ()
SENSOR SOLUTIONS /// HTG3500 Series HPC123_K
Temperature
(°C)
Resistance
(Ω)
Pull-Up Configuration
Vout (mV)
-40
-30
-20
-10
0
10
20
25
30
40
50
60
70
80
90
100
195652
113347
68237
42506
27219
17926
12081
10000
8315
5834
4161
3014
2228
1669
1268
974
4757
4595
4361
4048
3657
3210
2736
2500
2270
1842
1469
1158
911
665
563
444
110
758
352
9/2015
Page 6
HTG3500 SERIES
Relative Humidity and Temperature Module
CONNECTING AND MECHANICAL CHARACTERISTICS
CONNECTING CHARACTERISTICS
Connector
Type
Side
Connector
Symbo
l
Overview
CH
Housing
Connector
Pitch
1&3
-
Connector
Footprint
Mating
Connector
*
JST ZHR-4
* For alternate connector type, please contact factory.
Pin Out Assignment
N°
1
2
3
4
Function
Ground
Vcc – Voltage Supply
NTC – Temperature
Vout – Humidity
MECHANICAL CHARACTERISTICS: HTG3500 SERIES PACKAGE OUTLINE
Housing 1 : HTG351ZCH (with screw/fastener capability)
Package Outline
With CH connector
Dim
A
B
C
D
E
F
G
H
I
J
Typ (mm)
27 ± 0.25
11.9 ± 0.2
5.7 ± 0.5
24.65 ± 0.25
Ø2.5 ± 0.2
6.7 ± 0.3
1.5 ± 0.5
6.8 ± 0.5
10.7 ± 0.5
13.3 ± 0.5
Color : Black
Weight : 1.5g
Housing 1 can be fixed with a M2 screw. The recommended maximum mounting torque is 0.22 Nm.
SENSOR SOLUTIONS /// HTG3500 Series HPC123_K
9/2015
Page 7
HTG3500 SERIES
Relative Humidity and Temperature Module
Housing 3 : HTG3535CH (with PTFE membrane)
Package Outline
with CH connector
Dim
A
B
C
F
I
J
K
L
Typ (mm)
27 ± 0.25
11.9 ± 0.2
5.7 ± 0.5
6.7 ± 0.3
1.5 .3
± 0.5
6.8 ± 0.5
15.3 ± 0.5
18.4 ± 0.5
Color : Black
Weight : 1.8g
RESISTANCE TO PHYSICAL AND CHEMICAL 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, SO 2
(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.
SENSOR SOLUTIONS /// HTG3500 Series HPC123_K
9/2015
Page 8
HTG3500 SERIES
Relative Humidity and Temperature Module
ORDERING INFORMATION
HTG35YZ CH
X
Output voltage
5
Voltage
Y
Housing
1
With screw/fastener
Z
Voltage supply
3
With PTFE membrane
Product
HTG3513CH
HTG3515CH
HTG3535CH
3
3,3V
5
5
CH
Connector Type
CH
Order Reference
HPP815A533
HPP815A535
HPP815F535
EUROPE
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
TE.com/sensorsolutions
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might be trademarks of their respective owners.
The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is believed to be reliable. However, TE Connectivity makes
no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. TE Connectivity‘s obligations shall only be as set forth in TE Connectivity‘s Standard
Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, resale, use or misuse
of the product. Users of TE Connectivity products should make their own evaluation to determine the suitability of each such product for the specific application.
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TE Connectivity Ltd. family of companies
All Rights Reserved.
SENSOR SOLUTIONS /// HTG3500 Series HPC123_K
9/2015
Page 9