Based on the rugged HS1101 humidity sensor, HM1520 is a dedicated humidity transducer
designed for measurements at low humidity. Direct measurement of dew point or water
concentration can be easily obtained in really cost effective conditions. Direct interface with a
micro-controller is made possible with the module’s linear voltage output.
Main features
•
•
•
•
•
•
•
Tubular form for through wall mounting.
Not affected by water condensation
Full interchangeability.
Typical 1 to 1.6 Volt DC output for 0 to 20% RH at 5 V DC supply.
Calibrated, linear voltage for easy electronic interface.
Controlled temperature dependency
Ratiometric to voltage supply
Humidity sensor specific features
•
•
•
No affected by long period at low humidity values.
Patented solid polymer structure.
High resistance to chemicals.
Fast response time.
•
Maximum ratings
Ratings
Supply Voltage (Peak)
Operating Range (see graph below)
Operating Range (Dew Point)
Operating Range in Temperature
Symbol
Vs
RH
Td
Ta
Value
12
0 to 100
-50 to 30
-30 to 60
Unit
Vdc
% RH
°C
°C
Accuracy of HM1520 when used from 1 to 95% RH
10,0
8,0
6,0
4,0
2,0
0,0
-2,0
-4,0
-6,0
-8,0
-10,0
Relative Humidity in % Rh
Optimized
accuracy
range
+/- 3 to 5% RH
accuracy range
20
30
40
50
60
+/- 5 to 10% RH
accuracy range
0
10
70
80
90
100
Humirel Sensor Device Data / HPC009-20 RevA December 2000
1
TECHNICAL DATA
Characteristics
Characteristics
Humidity measuring range / Ta –30 to 60°C
(Vs = 5.0Vdc , R
L
> 1 MΩ otherwise stated)
Symbol
Min
Typ
Max
Unit
Relative Humidity accuracy(1-20%RH) at 23°C
Relative Humidity accuracy at 55% RH at 23°C
Voltage supply
Nominal output @ RH = 10 % / Ta 25°C
Current consumption
Temperature coefficient(10 to 50 °C and 1 to 20% RH)
Averaged Sensitivity from 5% to 10 % RH
Output Impedance
Sink current capability (R
L
= 15 kohm)
Humidity Hysteresis
Long term stability
Response time (5 to 10% RH, static, @63%)
RH
RH
RH
V
s
V
out
I
c
T
cc
∆mV/%RH
1
+/-2
+/-5
4.75
1.17
5.00
1.24
0.4
< 0.1
+26
70
+/-1.5
0.5
5
99
+/- 3
5.25
1.31
0.8
%RH
%RH
%RH
V
V
mA
%RH / °C
mV/%RH
Ohms
µA
% RH
%RH/yr
s
Z
I
s
300
τ
HM1520 Preliminary Specification when used from 1 to 30% RH
2000
V
out
= V
S
( 5.12 RH + 197)
or
1800
*
RH = 0.195 V
out
/ V
S
- 38.5
1700
with V
out
in mV, V
S
in V and RH in %
1900
1600
1500
1400
1300
1200
1100
1000
0
5
10
15
20
25
30
35
Relative Humidity in % RH
*
•
•
•
Those equations can be used above 30% RH and allow to obtain an over all accuracy as described in page one of this
document in all the humidity measuring range
Temperature (in the range 0 to 50°C) does not affect HM1520 measurement when used from 1 to 30% RH. No temperature
compensation is required.
Signal output from 1 to 20% RH at 23°C :
RH (%)
Vout (mV)
RH (%)
Vout (mV)
11
1269
0
1
1013
12
1294
2
1038
13
1320
3
1064
14
1346
4
1089
15
1371
5
1115
16
1397
6
1141
17
1422
7
1166
18
1448
8
1192
19
1474
9
1217
20
1499
10
1243
With Vs = 5.0 Volts DC
Calibration data are
traceable to NIST
standards through CETIAT laboratory.
Humirel Sensor Device Data / HPC009-20 RevA December 2000
2
TECHNICAL DATA
IMPORTANT NOTICE :
HM1520 is based on HS1101 capacitive sensor and thus is fully
useable on a large range of relative humidity ( 1 to 99% RH). In that range, HM1520 presents a
typical accuracy of +/-5% RH at 55% RH.)
However HM1520 is a dedicated module for humidity measurements at low Relative Humidity levels.
Thus, HM1520 is also well adapted to measure water concentrations (ppm) or low dew points
when associated with an ambient temperature probe.
HM1520 features an optimized accuracy for
water concentration below 6000ppm water or 0°C dew
point at 23°C
(equivalent to 20% RH) .
TYPICAL OUTPUT of HM1520 when measuring
water concentration at ambient temperature of 23°C :
ppm
Vout (mV)
ppm
Vout (mV)
3025
1269
0
275
1013
3300
1294
550
1038
3570
1320
825
1064
3850
1346
1100
1089
4120
1371
1375
1115
4395
1397
1650
1141
4670
1422
1925
1166
4945
1448
2200
1192
5220
1474
2470
1217
5495
1499
2750
1243
ppm
water
= 10.75 V
out
- -10615
with V
out
in mVolts
TYPICAL OUTPUT of HM1520 when measuring
dew point at ambient temperature of 23°C :
°C
Vout (mV)
°C
Vout (mV)
-9
1269
-36
1013
-7.8
1294
-29
1038
-6.8
1320
-24
1064
-5.8
1346
-21
1089
-4.9
1371
-18.5
1115
-4.1
1397
-16
1141
-3.2
1422
-14.5
1166
-2.5
1448
-13
1192
-1.6
1474
-11.5
1217
-1.1
1499
-10
1243
Humirel Sensor Device Data / HPC009-20 RevA December 2000
3
TECHNICAL DATA
Internal Block Diagram
Reference Oscillator
L.P. Filter
Sensor Oscillator
Gain
Vout
Vout-->
Package outline HM1520
HM1500
A
DIM
A
B
C
D
E
MIN
9.70
5.00
52
10.7
100
MAX
10.20
5.50
54
11.1
250
B
DIMENSIONS IN MILLIMETERS
D
C
WIRING
WIRE
W1
W2
W3
COLOR
WHITE
BLUE
YELLOW
FUNCTION
GND
VOLTAGE
OUTPUT
E
W1
W2
W3
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 application 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,
subsidiaries, affiliates and distributors harmless against all claims, costs, damages and expenses, and reasonable attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended 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.
Humirel Sensor Device Data / HPC009-20 RevA December 2000
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