HTG3500 Series – Relative Humidity and Temperature Module
•
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
•
Automotive
•
Reliability not affected by repeated condensation
•
Home Appliance
•
Printers
…
PERFORMANCE SPECS
MAXIMUM RATINGS
Ratings
Storage Temperature
Symbol
Value
Unit
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.
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January 2012
HTG3500 Series - Relative Humidity and Temperature Module
ELECTRICAL CHARACTERISTICS
(@T=23°C, RL>1MΩ unless otherwise noted)
Humidity Characteristics
Symbol
Min
Humidity Measuring Range
RH
0
Recovery time after 150 hours of condensation
%RH
±3
±5
%RH
-0.1
%RH/°C
t
10
s
+/-1
Output impedance
Z
(1)
I
Warm up time (90% of signal)
Time Constant (at 63% of signal) 33%RH to 75%RH
(1)
(2)
Unit
100
-0.05
Humidity hysteresis
Sink current capability (RL_Min = 8 kOhms)
Max
Tcc
Relative Humidity Accuracy (10% to 95%RH)
Temperature coefficient (10°C to 50°C)
Typ
(2)
%RH
50
Ω
1
mA
tw
150
ms
τ
5
10
s
Typ
Max
Unit
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
Nominal resistance @ 25°C
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
B value tolerance
Time Constant
1
%
B
1
%
τ
10
s
* 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
HTG3XYZ yyy
Connector Type
Voltage Supply: 3 for 3.3 Volts
5 for 5 Volts
Mechanical Package: 1 for Housing 1 with screw/fastener mount capability
3 for Housing 3 with PTFE membrane
Output Type: 4 for Frequency
5 for Voltage
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HTG3500 Series - Relative Humidity and Temperature Module
SPECIFIC ELECTRICAL AND METROLOGICALCHARACTERISTICS
•
HTG35Y3
Characteristics
Voltage Supply
Symbol
(1) (2)
Nominal Output @55%RH
Humidity Average Sensitivity
Current consumption
(1)
(2)
•
Min
Typ
Max
Unit
Vcc
3
3.3
3.46
Vdc
Vout
1.462
1.515
1.568
V
∆mV/RH
-
+18
-
mV/%RH
Icc
-
1.0
1.2
mA dc
Symbol
Min
Typ
Max
Unit
Vcc
4.75
5
5.25
Vdc
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)
Vout
2.401
2.480
2.559
V
∆mV/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
-4
3
2
Vout = 8.43E RH - 0.1485 RH + 34.16 RH + 909
-9
3
-5
2
-3
RH = -1.564E Vout + 1.205E Vout + 8.22E Vout - 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 %
HTG3500 Series HPC123_I
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
-4
3
-2
2
Vout = 5.57E RH – 9.81E RH + 22.55 RH + 477.2
-9
3
-5
2
-2
RH = -5.38E Vout + 2.55E Vout + 1.9E 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 %
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January 2012
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
β −
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”.
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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
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January 2012
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)
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
Rbatch
10k
W3
NTC Resistance output
HTG3500 NTC
10k @25°C
Vout (mV)
W1
Ground
VOUT (mV ) =
Vcc(mV ) * NTC HTG 3500 (Ω)
Rbatch (Ω) + NTC HTG 3500 (Ω)
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HTG3500 Series - Relative Humidity and Temperature Module
CONNECTING AND MECHANICAL CHARACTERISTICS
CONNECTING CHARACTERISTICS
Connector
Type
Side
Connector
Short Male
(1) (3)
Connector
(1.65 mm –
0.065 in long)
Long Male
(2) (3)
Connector
(4.27 mm –
0.198 in long)
Housing
Connector
Pitch
CH
1&3
-
PVBS
3
Samtec
CLT 104
Series
3
Direct
Soldering
(through
hole)
Symbol
Overview
Connector
Footprint
JST ZHR-4
1 28 7 6
3 4 5
PVBL
1 28 7 6
3 4 5
Female
(1) (3)
Connector
CFB
Mating
Connector*
-
3
4 35 6 7
2 1 8
Samtec
TMM 10405-D
* For alternate connector type, please contact factory.
(1)
(2)
(3)
Connector should undergo vibration test before validation.
A second fixing point add double-sided adhesive tape (ref: 3M – 5925F).
For board-to-board mounting, we suggest wave soldering.
Pins are connected by twos.
Pin Out Assignment
N°
1/8
2/7
3/6
4/5
Function
Ground
Vcc – Voltage Supply
NTC – Temperature
Vout – Humidity
WIRING CHARACTERISTICS
Overview
Housing
More information
Wiring cable length*: TBD
Pin Out Assignment (with wires)
Wiring cable type*: AWG 24 to 30
Colour
Black
Red
Green
Yellow
1
With wires
Wiring cable length*: TBD
3
Function
Ground
Vcc – Voltage Supply
NTC – Temperature
Vout – Humidity
Wiring cable type*: AWG 24 to 30
* On request, please contact factory.
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January 2012
HTG3500 Series - Relative Humidity and Temperature Module
MECHANICAL CHARACTERISTICS: HTG3500 SERIES PACKAGE OUTLINE
Housing 1 : HTG3X1Z (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.
Housing 3 : HTG3X3Z (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 ± 0.5
6.8 ± 0.5
15.3 ± 0.5
18.4 ± 0.5
Color : Black
Weight : 1.8g
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HTG3500 Series - Relative Humidity and Temperature Module
Package Outline
with PVBS connector
(1.65 mm – 0.065 in long)
Dim
A
B
C
D
E
F
Typ (mm)
27 ± 0.25
11.9 ± 0.2
5.7 ± 0.5
2.95 ± 0.3
4.32 ± 0.3
8.2 ± 0.5
Dim
G
H
I
J
K
L
Typ (mm)
1 ± 0.25
3° ± 1°
1.5 ± 0.5
6.8 ± 0.5
15.3 ± 0.5
18.4 ± 0.5
Color : Black
Weight : 1.8g
Package Outline
with PVBL connector
(4.27 mm – 0.198 in long)
Dim
A
B
C
D
E
F
Typ (mm)
27 ± 0.25
11.9 ± 0.2
5.7 ± 0.5
2.95 ± 0.3
4.32 ± 0.3
10.8 ± 0.5
Dim
G
H
I
J
K
L
Typ (mm)
1 ± 0.25
3° ± 1°
1.5 ± 0.5
6.8 ± 0.5
15.3 ± 0.5
18.4 ± 0.5
Color : Black
Weight : 1.8g
Package Outline
with CFB connector
Dim
A
B
C
D
E
Typ (mm)
27 ± 0.25
11.9 ± 0.2
5.7 ± 0.5
2.95 ± 0.3
4.32 ± 0.3
Dim
F
G
H
I
J
Typ (mm)
0.5 ± 0.25
1.5 ± 0.25
6.8 ± 0.5
15.3 ± 0.5
18.4 ± 0.5
Color : Black
Weight : 1.8g
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.
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January 2012
HTG3500 Series - Relative Humidity and Temperature Module
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
HTG3XYZ yyy
X
Y
Output Voltage
Housing
4
Frequency
5
Voltage
1
with screw/fastener
Product
HTG3513CH
HTG3533CH
HTG3533PVBL
HTG3533PVBS
HTG3533CFB
3
with PTFE membrane
Order Reference
HPP815A533
HPP815F533
HPP815H534
HPP815H533
HPP815H536
Z
Voltage
Supply
3
5
3.3V
5V
Product
HTG3515CH
HTG3535CH
HTG3535PVBL
HTG3535PVBS
HTG3535CFB
yyy
Connector Type
CH
PVBS
PVBL
CFB
Order Reference
HPP815A535
HPP815F535
HPP815G537
HPP815G536
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
E
F
G
H
I
Comments
Nomenclature updated
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
Wiring characteristics updated and dimension C rectified
Package outline updated for PVBL and PVBS modules,
dimensions C and D rectified for housing 3, HPP references
added
New MEAS Template applied, updated PVBS/PVBL/CFB
connector dimension definition in Mechanical Characteristics
paragraph
Who
D. LE GALL
Date
September 08
D. LE GALL
June 09
D. LE GALL
January 10
D. LE GALL
December 10
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.
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January 2012
