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Help CenterRelative Humidity Sensor - HM1520/HM1520LF
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HM1520/HM1520LF Relative Humidity Sensor Description
Based on the rugged HS1101LF capacitive humidity sensor, HM1520LF 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.
HM1520/HM1520LF Relative Humidity Sensor 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.
HM1520/HM1520LF Relative Humidity Sensor Applications
• telecommunication environment
• Automotive cabin air control
• Home appliances
• Agriculture and environment protection
• Industrial process control systems
HM1520/HM1520LF Relative Humidity Sensor Maximum ratings
Ratings |
Symbol |
Value |
Unit |
Supply Voltage (Peak) |
Vs |
12 |
Vdc |
Operating Range (see graph below) |
RH |
0 to 100 |
% RH |
Operating Range (Dew Point) |
Td |
-50 to 30 |
°C |
Operating Range in Temperature |
Ta |
-30 to 60 |
°C |
HM1520/HM1520LF Relative Humidity Sensor Characteristics
(Vs = 5.0Vdc , RL > 1 MΩ otherwise stated)
Characteristics |
Symbol |
Min |
Typ |
Max |
Unit |
Humidity measuring range / Ta–30 to 60°C |
RH |
1 |
99 |
%RH |
|
Relative Humidity accuracy(1-20%RH)at 23°C |
RH |
+/-2 |
+/-3 |
%RH |
|
Relative Humidity accuracy at 55% RH at 23°C |
RH |
+/-5 |
%RH |
||
Voltage supply |
Vs |
4.75 |
5.00 |
5.25 |
V |
Nominal output @ RH = 10 % / Ta 25°C |
Vout |
1.17 |
1.24 |
1.31 |
V |
Current consumption |
Ic |
0.4 |
0.8 |
mA |
|
Temperature coefficient(10 to 50°C and 1 to 20% RH) |
Tcc |
%RH/°C |
|||
Averaged Sensitivity from 5% to 10 % RH |
∆mV/%RH |
+26 |
mV/%RH |
||
Output Impedance |
Z |
70 |
Ohms |
||
Sink current capability (R L = 15 kohm) |
Is |
300 |
µA |
||
Humidity Hysteresis |
+/-1.5 |
% RH |
|||
Long term stability |
0.5 |
%RH/yr |
|||
Response time (5 to 10% RH, static, @63%) |
τ |
5 |
s |
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