HTG3500 Series – Relative Humidity and Temperature Module
HTG3500 Series HPC123_I www.meas-spec.com January 2012
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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 T
stg
-40 to +125 °C
Supply Voltage (Peak) V
cc
20 V
dc
Humidity Operating Range RH 0 to 100 %RH
Temperature Operating Range T
a
-40 to +110 °C
Maximum Output Current (Peak) I
peak
3 mA
Maximum Power Pd 10 mW
HTG3500 Series - Relative Humidity and Temperature Module
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ELECTRICAL CHARACTERISTICS
(@T=23°C, R
L
>1MΩ 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 3.3V
DC
OR AT 5V
DC
At 3.3V
DC
or at 5V
DC
power supply, there is no measurable impact of type of powering on temperature and RH
accuracy.
NOMENCLATURE
HTG3XYZ yyy
Humidity Characteristics Symbol Min Typ Max Unit
Humidity Measuring Range RH 0 100 %RH
Relative Humidity Accuracy (10% to 95%RH) ±3 ±5 %RH
Temperature coefficient (10°C to 50°C) T
cc
-0.05 -0.1 %RH/°C
Recovery time after 150 hours of condensation t 10 s
Humidity hysteresis +/-1 %RH
Output impedance Z 50 Ω
Sink current capability (R
L_Min
= 8 kOhms)
(1)
I 1 mA
Warm up time (90% of signal) t
w
150 ms
Time Constant (at 63% of signal) 33%RH to 75%RH
(2)
τ 5 10 s
Temperature Characteristics* Symbol Min Typ Max Unit
Nominal resistance @ 25°C R 9.9 10 10.1 kΩ
Beta value : B25/50 B 3346 3380 3414 K
Temperature measuring range T
a
-40 85 °C
Nominal Resistance Tolerance at 25°C R
n
1 %
B value tolerance B 1 %
Time Constant τ 10 s
Voltage Supply: 3 for 3.3 Volts
5 for 5 Volts
Connector Type
Output Type: 4 for Frequency
5 for Voltage
Mechanical Package: 1 for Housing 1 with screw/fastener mount capability
3 for Housing 3 with PTFE membrane
HTG3500 Series - Relative Humidity and Temperature Module
HTG3500 Series HPC123_I www.meas-spec.com January 2012
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SPECIFIC ELECTRICAL AND METROLOGICALCHARACTERISTICS
• 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
Characteristics Symbol Min Typ Max Unit
Voltage Supply
(1) (2)
V
cc
3 3.3 3.46 V
dc
Nominal Output @55%RH V
out
1.462 1.515 1.568 V
Humidity Average Sensitivity ∆mV/RH - +18 - mV/%RH
Current consumption I
cc
- 1.0 1.2 mA dc
Characteristics Symbol Min Typ Max Unit
Voltage Supply
(1) (2)
V
cc
4.75 5 5.25 V
dc
Nominal Output @55%RH V
out
2.401 2.480 2.559 V
Humidity Average Sensitivity ∆mV/RH - +26 - mV/%RH
Current consumption I
cc
- 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
V
out
= 8.43E
-4
RH
3
- 0.1485 RH
2
+ 34.16 RH + 909
RH = -1.564E
-9
V
out3
+ 1.205E
-5
V
out2
+ 8.22E
-3
V
out
- 15.6
with V
out
in mV and RH in %
POLYNOMIAL EQUATIONS
V
out
= 5.57E
-4
RH
3
– 9.81E
-2
RH
2
+ 22.55 RH + 477.2
RH = -5.38E
-9
V
out3
+ 2.55E
-5
V
out2
+ 1.9E
-2
V
out
- 13.5
with V
out
in mV and RH in %
LINEAR EQUATIONS
V
out
= 26.23 RH + 1032
RH = 0.03812 V
out
– 39.36
with V
out
in mV and RH in %
LINEAR EQUATIONS
V
out
= 17.52 RH + 544.1
RH = 0.057 V
out
– 31.0
with V
out
in mV and RH in %
HTG3500 Series - Relative Humidity and Temperature Module
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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.
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 “Low power NTC measurement”.
0
0 10 20 30 40 50 60 70 80 90 100
−
×=
N
TT
NT
eRR
11
β
HTG3500 Series - Relative Humidity and Temperature Module
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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
Tempe rature (°C)
Delta T emp era ture (°C)
0.1°C tolerance on Resistance Measurement
HTG3500 Series - Relative Humidity and Temperature Module
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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
Ω+Ω
Ω
=
HTGbatch
HTG
OUT
NTCR
NTCmVVcc
mVV
HTG3500 Series - Relative Humidity and Temperature Module
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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
Short Male
Connector
(1) (3)
(1.65 mm –
0.065 in long)
PVBS
3
Samtec
CLT 104
Series
Long Male
Connector
(2) (3)
(4.27 mm –
0.198 in long)
PVBL
3
Direct
Soldering
(through
hole)
Female
Connector
(1) (3)
CFB
3
-
Samtec
TMM 104-
05-D
* For alternate connector type, please contact factory.
(1)
Connector should undergo vibration test before validation.
A second fixing point add double-sided adhesive tape (ref: 3M – 5925F).
(2)
For board-to-board mounting, we suggest wave soldering.
(3)
Pins are connected by twos.
Pin Out Assignment
N° Function
1
/8
Ground
2
/7
Vcc
–
Voltage Supply
3
/6
NTC
–
Temperature
4
/5
Vout
–
Humidity
WIRING CHARACTERISTICS
With wires
Overview
Housing
More information
1
Wiring cable length*: TBD
Wiring cable type*: AWG 24 to 30
3
Wiring cable length*: TBD
Wiring cable type*: AWG 24 to 30
* On request, please contact factory.
Pin Out Assignment (with wires)
Colour Function
Black
Ground
Red
Vcc
–
Voltage Supply
Green
NTC
–
Temperature
Yellow
Vout
–
Humidity
6
5
7
8
3
4
2
1
7
8
6
5
2
1
3
4
7
8
6
5
2
1
3
4
HTG3500 Series - Relative Humidity and Temperature Module
HTG3500 Series HPC123_I www.meas-spec.com January 2012
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MECHANICAL CHARACTERISTICS: HTG3500 SERIES PACKAGE OUTLINE
Housing 1 : HTG3X1Z
(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 : HTG3X3Z
(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
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_I www.meas-spec.com January 2012
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Package Outline
with PVBS connector
(1.65 mm – 0.065 in long)
Dim Typ (mm) Dim
Typ (mm)
A
27 ± 0.25
G
1 ± 0.25
B
11.9 ± 0.2
H
3° ± 1°
C
5.7 ± 0.5
I
1.5 ± 0.5
D
2.95 ± 0.3
J
6.8 ± 0.5
E
4.32 ± 0.3
K
15.3 ± 0.5
F
8.2 ± 0.5
L
18.4 ± 0.5
Package Outline
with PVBL connector
(4.27 mm – 0.198 in long)
Dim Typ (mm) Dim
Typ (mm)
A
27 ± 0.25
G
1 ± 0.25
B
11.9 ± 0.2
H
3° ± 1°
C
5.7 ± 0.5
I
1.5 ± 0.5
D
2.95 ± 0.3
J
6.8 ± 0.5
E
4.32 ± 0.3
K
15.3 ± 0.5
F
10.8
± 0.5
L
18.4 ± 0.5
Package Outline
with CFB connector
Dim Typ (mm) Dim
Typ (mm)
A
27 ± 0.25
F
0.5 ± 0.25
B
11.9 ± 0.2
G
1.5 ± 0.25
C
5.7 ± 0.5
H
6.8 ± 0.5
D
2.95 ± 0.3
I
15.3 ± 0.5
E
4.32 ± 0.3
J
18.4 ± 0.5
Double coated adhesive tape could be used on potted area for housings 1 and 3 (ref: 3M – 5925F) to fix parts.
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.
Color : Black
Weight : 1.8g
Color : Black
Weight : 1.8g
Color : Black
Weight
: 1.
8g
HTG3500 Series - Relative Humidity and Temperature Module
HTG3500 Series HPC123_I www.meas-spec.com January 2012
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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%), H
2
S (0.5%), O
3
, NO
x
, NO, CO, CO
2
, Softener, Soap, Toluene, acids (H
2
SO
4
, HNO
3
, HCl), HMDS,
Insecticide, Cigarette smoke, a non-exhaustive list.
HTG3500 Series are not light sensitive.
ORDERING INFORMATION
HTG3XYZ yyy
Product Order Reference Product Order Reference
HTG3513CH HPP815A533 HTG3515CH HPP815A535
HTG3533CH HPP815F533 HTG3535CH HPP815F535
HTG3533PVBL HPP815H534 HTG3535PVBL HPP815G537
HTG3533PVBS HPP815H533 HTG3535PVBS HPP815G536
HTG3533CFB HPP815H536 HTG3535CFB HPP815F534
Customer Service contact details
Measurement Specialties, Inc.
105 av. du Général Eisenhower
BP 23705 31037 TOULOUSE CEDEX 1
FRANCE
Tél: +33 (0) 561 194 848
Fax:+33 (0) 561 194 553
Sales: humidity.sales@meas-spec.com
Revision
Comments
Who
Date
E Nomenclature updated D. LE GALL September 08
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
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.
X
Y
Z
yyy
Output Voltage Housing
Voltage
Supply Connector Type
4
5
1
3
3
5
CH PVBS PVBL CFB
Frequency
Voltage
with screw/fastener
with PTFE membrane
3
.3V
5V
