Document
HIH-4602-L Series
Humidity Sensors
DESCRIPTION HIH-4602-L Series Relative Humidity (RH) sensors are designed to deliver RH sensing in a rugged, low-cost slotted TO-5 can. The laser-trimmed, thermoset polymer capacitive sensing elements have on-chip integrated signal conditioning, helping to reduce product development times. FEATURES • • • • • • • Near linear voltage output vs %RH Laser-trimmed interchangeability Enhanced accuracy, fast response Chemically resistant Stable, low drift performance Built-in static protection TO-5 can POTENTIAL APPLICATIONS • • • • • Refrigeration Drying Meteorology Battery-powered systems OEM (Original Equipment Manufacturer) assemblies HIH-4602-L-CP sensors include a calibration and data printout to allow individually matched downstream electronics and ±3.5 %RH total accuracy. A typical current draw of only 200 µA allows use in batterypowered systems.
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HIH-4602-L Series
Table 1. Performance Specifications (At 5 Vdc supply and 25 ºC [77 ºF] unless otherwise noted.) Parameter Interchangeability (first order curve) 0% RH to 59% RH 60% RH to 100% RH Accuracy (best fit straight line) Hysterisis Repeatability Settling time Response time (1/e in slow moving air) Stability (at 50% RH in one year) Voltage supply Current supply Output voltage temp. coefficient at 50% RH, 5 V Voltage output (1st order curve fit) Temperature compensation Operating temperature Operating humidity Storage temperature Storage humidity Specific Notes: 1. Applies to HIH-4602-L-CP only. 2. Device is calibrated at 5 Vdc and 25 ºC. 3. Non-condensing environment. Minimum Typical Maximum Unit Specific Note – – – 1 – – – – – – – – 2
– – – – -5 – 5 % RH -8 – 8 % RH -3.5 – +3.5 % RH – 3 – % RH – ±0.5 – % RH – – 70 ms – 30 – s – 1.2 – % RH 4 – 5.8 Vdc – 200 500 µA – -4 – mV/°C VOUT = (VSUPPLY)(0.0062(sensor RH) + 0.16), typical at 25 °C
True RH = (sensor RH)/(1.0546-0.00216T), T in °C -40[-40] See Figure 1. 85[185] °C[°F] – 0 See Figure 1. 100 % RH 3 -40[-40] See Figure 2. 125[257] °C[°F] – See Figure 2. % RH 3 General Notes: • Sensor is ratiometric to supply voltage. • Extended exposure to >90% RH causes a reversible shift of 3% RH. • Sensor is light sensitive. For best performance, shield sensor from bright light.
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Factory Calibration Data HIH-4602-L-CP Sensors include a calibration and data printout. See Table 2. Table 2. Example Data Printout Model Channel Wafer MRP Calculated values at 5 V VOUT at 0% RH VOUT at 75.3% RH Linear output for 3.5% RH accuracy at 25 °C Zero offset Slope RH Ratiometric response for 0% RH to 100% RH VOUT
HIH-4602-L-CP 92 030996M 337313 0.958 V 3.268 V
0.958 V 30.680 mV/%RH (VOUT - zero offset)/slope (VOUT - 0.958)/0.0307
VSUPPLY (0.1915 to 0.8130)
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Humidity Sensors
Figure 1. Operating Environment (Non-condensing environment.)
Figure 2. Storage Environment (Non-condensing environment.)
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Honeywell Sensing and Control
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HIH-4602-L S.