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 | <0.1 | %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 |
