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) (cid:150) (cid:150) (cid:150) (cid:150) (cid:150) 0% RH to 59% RH -5 (cid:150) 5 % RH (cid:150) 60% RH to 100% RH -8 (cid:150) 8 % RH (cid:150) Accuracy (best fit straight line) -3.5 (cid:150) +3.5 % RH 1 Hysterisis (cid:150) 3 (cid:150) % RH (cid:150) Repeatability (cid:150) ±0.5 (cid:150) % RH (cid:150) Settling time (cid:150) (cid:150) 70 ms (cid:150) Response time (1/e in slow moving air) (cid:150) 50 (cid:150) s (cid:150) Stability (at 50% RH in one year) (cid:150) ±1.2 (cid:150) % RH (cid:150) Voltage supply 4 (cid:150) 5.8 Vdc (cid:150) Current supply (cid:150) 200 500 (cid:181)A (cid:150) Output voltage temp. coefficient at 50% RH, 5 V – -4 – mV/”C (cid:150) 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] (cid:150) Operating humidity 0 See Figure 1. 100 % RH 2 Storage temperature -50[-58] (cid:150) 125[257] ”C[”F] (cid:150) 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 V at 75.3% RH 3.198 V a = 0.000828083 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 Ratiometric response for Thin film platinum RTD – Class 2B (Ro: ±0.25%) 0% RH to 100% RH DIN EN 60571 (PER IEC 751) V V (0.1652 to 0.7952) TCR = 3750 ppm/”C OUT SUPPLY 1000 Ohm at 0 ”C [32 ”F] 2 www.honeywell.com/sensing

Humidity Sensors FIGURE 1. OPERATING ENVIRONMENT (Non-condensing environment.) FIGURE 2. STORAGE ENVIRONMENT (Non-condensing environment.) Honeywell Sensing and Control 3

HIH-4602-A/C Series FIGURE 3. TYPICAL OUTPUT VOLTAGE VS RELATIVE HUMIDITY (At 25 ºC and 5 V.) 4 3.5 3 c) d V ge ( 2.5 Sensor Response a olt Sensor Response V ut 2 Best Linear Fit p ut O 1.5 1 0.5 0 20 40 60 80 100 Relative Humidity (%RH) FIGURE 4. TYPICAL OUTPUT VOLTAGE (BFSL) VS RELATIVE HUMIDITY (At 0 ”C, 70 ”C and 5 V.) 4.5 4 3.5 3 c) d V e ( 2.5 ag 0 C olt 70 C V ut 2 p ut O 1.5 1 0.5 0 0 10 20 30 40 50 60 70 80 90 100 Relative Humidity (%) 4 www.honeywell.com/sensing

Humidity Sensors FIGURE 5. HIH-4602-A/C 1MOUNTING DIMENSIONS (For reference only. mm/[in]) 1. Case ground 4. (+) Vdc supply 2. Vdc out 5., 6. HIH-4602-A thermistor for temperature compensation 3. (-) Power or ground 5., 6. HIH-4602-C RTD for temperature compensation FIGURE 6. RH SENSOR CONSTRUCTION Sensor construction consists of a planar capacitor with a second polymer layer to protect against dirt, dust, oils and other hazards. Honeywell Sensing and Control 5

HIH-4602-A/C Series FIGURE 7. TYPICAL APPLICATION CIRCUIT ORDER GUIDE Catalog Listing Description HIH-4602-A Monolithic IC humidity sensor with integral thermistor in TO-5 can HIH-4602-C Monolithic IC humidity sensor with integral precision RTD in TO-5 can FURTHER HUMIDITY SENSOR INFORMATION See the following associated literature at www.honeywell.com/sensing: • Product installation instructions • Application sheets: (cid:150) Humidity Sensor Performance Characteristics (cid:150) Humidity Sensor Theory and Behavior (cid:150) Humidity Sensor Moisture and Psychrometrics (cid:150) Thermoset Polymer-based Capacitive Sensors 6 www.honeywell.com/sensing

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