HIH-4602-A/C Series Humidity Sensors DESCRIPTION HIH-4602-A/C Series Relative Humidity (RH) sensors combine both relative humidity and temperature sensing in a TO-5 housing with a hydrophobic sintered stainless steel filter. The laser-trimmed, thermoset polymer capacitive sensing elements have on-chip integrated signal conditioning. The HIH-4602-A contains an integral thermistor, while the HIH4602-C contains an integral precision RTD. Factory calibration data supplied with each sensor allows individually matched downstream electronics and ±3.5 %RH total accuracy. 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 • Near linear voltage output vs %RH • Laser-trimmed interchangeability • Enhanced accuracy, fast response • Chemically resistant • Stable, low drift performance • Built-in static protection • Often ideal for dew point and absolute moisture measurements • TO-5 housing POTENTIAL APPLICATIONS • Refrigeration • Drying • Meteorology • Battery-powered systems • OEM (Original Equipment Manufacturer) assemblies HIH-4602-A/C 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. Device is calibrated at 5 Vdc and 25 ºC. 2. Non-condensing environment. Minimum – -5 -8 -3.5 – – – – – 4 – – TABLE 2. EXAMPLE DATA PRINTOUT Model HIH-4602-C Channel 92 Wafer 030996M MRP 337313 Calculated values at 5 V 0.826 V VOUT at 0% RH 3.198 V VOUT at 75.3% RH Linear output for 3.5% RH accuracy at 25 °C Zero offset 0.826 V Slope 31.483 mV/%RH RH (VOUT - zero offset)/slope (VOUT - 0.826)/0.0315 Ratiometric response for 0% RH to 100% RH VOUT VSUPPLY (0.1652 to 0.7952) www.honeywell.com/sensing Maximum Unit – – – 5 % RH – 8 % RH – % RH – +3.5 3 % RH – ±0.5 % RH – 70 ms – 50 s – ±1.2 % RH – 5.8 Vdc – 500 µA 200 -4 – mV/ºC VOUT=(VSUPPLY)(0.0062(sensor RH) + 0.16), typical at 25 ºC Specific Note – – – 1 – – – – – – – – True RH = (sensor RH)/(1.0546-0.00216T), T in ºC -40[-40] See Figure 1. 85 ºC[ºF] – 0 See Figure 1. 100 % RH 2 -50[-58] 125 ºC[ºF] – – See Figure 2. % RH 2 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. FACTORY CALIBRATION DATA HIH-4602 Sensors are supplied with a calibration and data printout. See Table 2. 2 Typical TABLE 3. HIH-4602-A NTC THERMISTOR TEMPERATURE SPECIFICTIONS Rb = 100 kOhm ±5% at 25 ºC Beta = 4250, 25 ºC to 85 ºC 1/T = a + b(Ln R) + c(Ln R) ^ 3, T in degrees K Low Mid High Temp. ºC 0 50 100 Resistance 351000 33590 5569 a = 0.000828083 b = 0.000208691 c = 8.0812E-08 TABLE 4. HIH-4602-C RTD TEMPERATURE SENSOR SPECIFICATIONS Thin film platinum RTD – Class 2B (Ro: ±0.25%) DIN EN 60571 (PER IEC 751) TCR = 3750 ppm/ºC 1000 Ohm at 0 ºC [32 ºF] 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 Output Voltage (Vdc) 3 2.5 Sensor Response Sensor Response Best Linear Fit 2 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 ºC, 70 ºC and 5 V.) 4.5 4 3.5 Output Voltage (Vdc) 3 2.5 0C 70 C 2 1.5 1 0.5 0 0 10 20 30 40 50 60 Relative Humidity (%) 4 www.honeywell.com/sensing 70 80 90 100 Humidity Sensors FIGURE 5. HIH-4602-A/C 1MOUNTING DIMENSIONS (For reference only. mm/[in]) 1. Case ground 2. Vdc out 3. (-) Power or ground 4. (+) Vdc supply 5., 6. HIH-4602-A thermistor for temperature compensation 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 HIH-4602-A HIH-4602-C Description Monolithic IC humidity sensor with integral thermistor in TO-5 can 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: – Humidity Sensor Performance Characteristics – Humidity Sensor Theory and Behavior – Humidity Sensor Moisture and Psychrometrics – Thermoset Polymer-based Capacitive Sensors 6 www.honeywell.com/sensing Humidity Sensors THIS PAGE INTENTIONALLY LEFT BLANK.. Honeywell Sensing and Control 7 WARNING WARNING MISUSE OF DOCUMENTATION • The information presented in this product sheet is for reference only. Do not use this document as a product installation guide. • Complete installation, operation, and maintenance information is provided in the instructions supplied with each product. 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For application assistance, current specifications, pricing or name of the nearest Authorized Distributor, contact your local sales office or: E-mail: [email protected] Internet: www.honeywell.com/sensing Phone and Fax: Asia Pacific +65 6355-2828 +65 6445-3033 Fax Europe +44 (0) 1698 481481 +44 (0) 1698 481676 Fax Latin America +1-305-805-8188 +1-305-883-8257 Fax USA/Canada +1-800-537-6945 +1-815-235-6847 +1-815-235-6545 Fax Specifications may change without notice. The information we supply is believed to be accurate and reliable as of this printing. However, we assume no responsibility for its use. Automation and Control Solutions Sensing and Control Honeywell 1985 Douglas Drive North Minneapolis, MN 55422 www.honeywell.com/sensing 009022-1-EN IL50 GLO Printed in USA January 2007 © 2007 Honeywell International Inc. All rights reserved.