TECHNICAL DATA
1
RELATIVE HUMIDITY MODULE
HM 1500
Based on the rugged HS1101 capacitive humidity sensor, HM1500 is a dedicated humidity transducer
designed for OEM applications where a reliable and accurate measurement is needed. Direct interface with a
micro-controller is made possible with the module's linear voltage output.
M
AIN FEATURES
H
UMIDITY SENSOR SPECIFIC FEATURES
G
Small size
G
Not affected by water immersion
G
Full interchangeability
G
High reliability and long term stability
G
Typical 1 to 4 Volt DC output for 0 to 100 % RH at 5 V DC supply
G
Calibrated within +/- 2 % RH @ 55 % RH
G
Very low temperature dependence
G
Ratiometric to voltage supply within the specified range
G
Suitable for 3 to 7 Volts supply voltage
G
Instantaneous de-saturation after long periods in saturation phase.
G
Patented solid polymer structure.
G
High resistance to chemicals.
G
Fast response time.
M
AXIMUM RATINGS
C
HARACTERISTICS
Ratings
Symbol
Value
Unit
Storage Temperature
T
stg
-30 to 70 C
Supply Voltage (Peak)
Vs 7 Vdc
Humidity Operating Range RH 0 to 100 % RH
Temperature Operating Range Ta -30 to 60 C
Characteristics
Symbol
Min.
Typ.
Max.
Unit.
Humidity measuring range
RH
1
99
% RH
Relative Humidity accuracy (10 to 95 % RH)
RH
+/- 3 +/- 5 % RH
Voltage supply V
s
4.75 5.00 5.25 V
Nominal output @ RH = 55 % V
out
2.42 2.48 2.54 V
Current consumption I
c
0.4 0.8 mA
Temperature coefficient (10 to 50 C ) T
cc
+ 0.1 % RH/C
Averaged Sensitivity from 33% to 75% RH
mV /
%
RH + 25 mV /% RH
Sink current capability (R
L
= 15 k
)
I
s
300
A
Recovery time after 150 hours of condensation t 10 s
Humidity Hysteresis +/-1.5 % RH
Long term stability 0.5 % RH/yr
Response time (33 to 76 % RH, static, @ 63 %)
10 s
Output impedance
Z
70
(Ta = 23C, Vs = 5Vdc, RL
>
1M
otherwise stated)
HPC009 Rev. H October 2001
Peak conditions : less than 10% of the operational time.
1
2
HM 1500
AMBIENT TEMPERATURE IN
C
100
75
50
0
-40
-20
0
20
40
60
80
25
OPERATING RANGE
INTERMITTENT
OPERATION
RELA
TIVE HUMIDITY IN %
STEADY ST
A
TE
RH (%) V
out
(mV) RH (%) V
out
(mV)
TECHNICAL DATA
2
HPC009 Rev. H October 2001
REFERENCE OUTPUT VALUES
HM 1500 Typical Measuring Ranges in Humidity
M
EASUREMENT
C
ONDITIONS
G
HM1500 is specified for accurate measurements
within 10 to 95% RH.
G
Excursion out of this range (< 10% or > 95% RH,
including condensation) does not affect the reliability
of HM1500 characteristics.
G
Dedicated HM15XX Product are available for
extreme RH conditions (as HM1520 for low dewpoints)
Consult HUMIREL for further information.
HM1500 M
ODELLED
L
INEAR
V
OLTAGE
O
UTPUT
(V
S
= 5V)
E
RROR
B
UDGET AT
23C
Temperature coefficient compensation
RH
Cor
% = RH%
Read
* (1 -(Ta -23)* 2.4E-3)
Reversed Polynomial Equation
Vout = 9E-4RH3 -1.3E-1RH2 + 30.815RH + 1030
All equations V
out
in mV, RH in %, Ta in C.
Non linearity and temperature compensation
RH% = -1.919E-9V
out
3 + 1.335E-5V
out
2
+ 9.607E-3V
out
- 21.75
1 + (Ta-23) * 2.4E-3
LINEARITY ERROR OF HM1500 MODULE
HM1500 ERROR LIMITS
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
1325
1465
1600
1735
1860
1990
2110
2235
2360
2480
2605
2730
2860
2990
3125
3260
3405
3555
Relative Humidity in %
Output V
o
ltage (mV)
Relative Humidity in % RH
Output V
o
ltage (mV)
Relative Humidity in % RH
Delta in % RH
Relative Humidity in % RH
Delta in % RH
1000
1500
2000
2500
3000
3500
4000
HM 1504
METROLOGY
HM 1500 RANGE
METROLOGY
HM 1520 RANGE
0
10
20
30
40
50
60
70
80
90
100
-2
-1
0
1
2
-1.5
-0.5
0.5
1.5
0
10
20
30
40
50
60
70
80
90
100
-6
-4
-2
0
2
4
6
-5
-3
-1
1
3
5
0
10
20
30
40
50
60
70
80
90
100
1000
1500
2000
2500
3000
3500
4000
Vout = 25.68 RH + 1079
from 10 to 95 % RH
with Vout in mV and RH in %
0
10
20
30
40
50
60
70
80
90
100
TECHNICAL DATA
3
HPC009 Rev. H October 2001
Steps of 1% RH are
achievable by using
8-bit A/D.
If more resolution is
required a 10 -bit A/D
needs to be used and a
third display will be
added, giving steps of
0.2% RH
Read AINO
Send data to display
Convert RH% to
BCD code
Calculate RH%
using equation
or
using alook up table
VCC5
VCC5
VCCIN
VI
VO
GND
VCC5
HM150X
3
1
3
2
4
U1
C2
X1
C1
7805
15
16
RTCC
MCLR
OSC1
OSC2/CLK
PIC16CXXX
With A/D
RBO
RB1
RB2
RB3
RB4
RB5
RB6
RB7
RA/AIN0
RA/AIN1
RA/AIN2
RA/AIN3
17
18
1
2
6
7
8
9
10
11
12
1317
H
UMIDITY
M
EASUREMENT USING
HM1500
Typical HM 1500 relative Humidity measurement
0
1000
1500
2000
2500
3000
3500
4000
10
20
30
40
50
60
70
80
100
% RH = 0.0391 Vout -42.5
from 10 to 95 % RH
with Vout in mV and RH in %
Internal block diagram of HM1500
Suggested applications for HM1500
Output Voltage (mV)
Relative Humidity (% RH)
Reference Oscillator
Sensor Oscillator
L.P. Filter
Gain
Vout --
>
TECHNICAL DATA
4
The information in this sheet has been carefully reviewed and is believed to be accurate; however, no responsability 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. Humirel reserves the right to make changes without further notice to any product herein. Humirel
makes no warranty, representation or guarantee regarding the suitability of its product for any particular purpose, nor does Humirel 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, including Typical must be validated for each customer applications by customer's technical experts. Humirel does not convey any license under its
patent rights nor the rights of others. Humirel products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other appli-
cation intended to support or sustain life, or for any application in which the failure of the Humirel product could create a situation where personal injury or death may occur. Should buyer
purchase or use Humirel products for any such unintended or unauthorized application, Buyer shall indemnify and hold Humirel and its officers, employees, subsidaries, affiliates and distribu-
tors harmless against all claims, costs, damages and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of presonal injury or death associated with such unin-
tended or unauthorized use, even if such claim alleges that Humirel was negligent regarding the design or manufacture of the part.Humirel is a registred trade mark of Humirel.
HPC009 Rev. H October 2001
ORDERING INFORMATION (MULTIPLE PACKAGE QUANTITY OF 10 PIECES).
HM1500 : HUMIDITY ANALOG VOLTAGE OUTPUT MODULE.
* specific length available on request
A
9.70 10.20
B
5.00 5.50
C
52 54
D
11.2 11.6
E*
200 250
email : sales@humirel.com
SAMPLE KIT OF HM1500
IS AVAILABLE THROUGH
HUMIREL WEB SITE
www.humirel.com
Dim Min (mm) Max (mm)
W1
White
GROUND
W2
Blue
SUPPLY VOLTAGE
W3
Yellow OUTPUT
VOLTAGE
Wire Color Function
PACKAGE
OUTLINE
HM1500
A
B
C
E
W1
W2
W3
D
G
RESISTANCE TO PHYSICAL AND CHEMICAL STRESSES
- HM1500 has passed through qualification processes of HUMIREL including vibration, shock, storage, high temperature
and humidity, ESD.
- Additional tests under harsh chemical conditions demonstrate good operation in presence of salt atmosphere, SO2 (O.5%),
H2S (0.5%), O3, NOx, NO, CO, CO2, Softener, Soap, Toluene, acids (H2SO4, HNO3, HCl), HMDS, Insecticide, Cigarette
smoke, a non exhaustive list.
- HM1500 is not light sensitive.
G
SPECIFIC PRECAUTIONS
- HM1500 is not protected against reversed polarity - Check carefully when connecting the device.
- If you wish to use HM1500 in a chemical atmosphere not listed above, consult us.
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