HIH-4602-A

HIH-4602-A/C Series Humidity Sensors DESCRIPTION The HIH-4602-A contains an integral thermistor, while the HIH- HIH-4602-A/C Series Relative Humidity (RH) sensors combine 4602-C contains an integral precision RTD. both relative humidity and temperature sensing in a TO-5 housing with a hydrophobic sintered stainless steel filter. Factory calibration data supplied with each sensor allows individually matched downstream electronics and 3.5 %RH The laser-trimmed, thermoset polymer capacitive sensing total accuracy. elements have on-chip integrated signal conditioning. The temperature sensor is thermally connected with the RH sensor making the HIH-4602-A/C often ideal for measuring dew point and other absolute moisture terms. FEATURES POTENTIAL APPLICATIONS Near linear voltage output vs %RH Refrigeration Laser-trimmed interchangeability Drying Enhanced accuracy, fast response Meteorology Chemically resistant Battery-powered systems Stable, low drift performance OEM (Original Equipment Manufacturer) assemblies Built-in static protection Often ideal for dew point and absolute moisture measurements TO-5 housing HIH-4602-A/C Series TABLE 1. PERFORMANCE SPECIFICATIONS (At 5 Vdc supply and 25 C 77 F unless otherwise noted.) Parameter Minimum Typical Maximum Unit Specific Note Interchangeability (first order curve) 0% RH to 59% RH -5 5 % RH 60% RH to 100% RH -8 8 % RH Accuracy (best fit straight line) -3.5 +3.5 % RH 1 Hysterisis 3 % RH Repeatability 0.5 % RH Settling time 70 ms Response time (1/e in slow moving air) 50 s Stability (at 50% RH in one year) 1.2 % RH Voltage supply 4 5.8 Vdc Current supply 500 A 200 Output voltage temp. coefficient at 50% RH, 5 V -4 mV/C Voltage output (1st order curve fit) V =(V )(0.0062(sensor RH) + 0.16), typical at 25 C OUT SUPPLY Temperature compensation True RH = (sensor RH)/(1.0546-0.00216T), T in C Operating temperature -40 -40 See Figure 1. 85 185 C F Operating humidity 0 See Figure 1. 100 % RH 2 Storage temperature -50 -58 125 257 C F Storage humidity See Figure 2. % RH 2 Specific Notes: General Notes: 1. Device is calibrated at 5 Vdc and 25 C. Sensor is ratiometric to supply voltage. 2. Non-condensing environment. Extended exposure to >90% RH causes a reversible shift of 3% RH. Sensor is light sensitive. For best performance, shield sensor from bright light. FACTORY CALIBRATION DATA TABLE 3. HIH-4602-A NTC THERMISTOR TEMPERATURE HIH-4602 Sensors are supplied with a calibration and data SPECIFICTIONS printout. See Table 2. Rb = 100 kOhm 5% at 25 C TABLE 2. EXAMPLE DATA PRINTOUT Beta = 4250, 25 C to 85 C Model HIH-4602-C 1/T = a + b(Ln R) + c(Ln R) 3, T in degrees K Channel 92 Temp. C Resistance Wafer 030996M Low 0 351000 MRP 337313 Mid 50 33590 Calculated values at 5 V High 100 5569 V at 0% RH 0.826 V OUT a = 0.000828083 V at 75.3% RH 3.198 V OUT Linear output for 3.5% RH b = 0.000208691 accuracy at 25 C c = 8.0812E-08 Zero offset 0.826 V Slope 31.483 mV/%RH TABLE 4. HIH-4602-C RTD TEMPERATURE SENSOR RH (V - zero offset)/slope OUT SPECIFICATIONS (V - 0.826)/0.0315 OUT Thin film platinum RTD Class 2B (Ro: 0.25%) Ratiometric response for DIN EN 60571 (PER IEC 751) 0% RH to 100% RH V OUT V (0.1652 to 0.7952) TCR = 3750 ppm/C SUPPLY 1000 Ohm at 0 C 32 F 2 www.honeywell.com/sensing