HIH-4010/4020/4021 Series Humidity Sensors DESCRIPTION The HIH-4010 is an uncovered integrated humidity sensor, the The HIH-40104020/4021 Series Humidity Sensors are HIH-4020 is a covered integrated circuit humidity sensor, and designed specifically for high volume OEM (Original Equipment the HIH-4021 is a covered, condensation-resistant, integrated Manufacturer) users. circuit humidity sensor. All three products are available in two lead space configurations. Direct input to a controller or other device is made possible by this sensors near linear voltage output. With a typical current The RH sensor is a laser trimmed, thermoset polymer draw of only 200 A, the HIH-4010/4020/4021 Series is often capacitive sensing element with on-chip integrated signal ideally suited for low drain, battery operated systems. conditioning. Tight sensor interchangeability reduces or eliminates OEM The sensing element s multilayer construction provides production calibration costs. Individual sensor calibration data excellent resistance to most application hazards such as is available. wetting, dust, dirt, oils and common environmental chemicals. Both products are available in two lead spacing configurations, The HIH-4010/4020/4021 Series delivers instrumentation- as well as with or without calibration and data printouts. quality RH (Relative Humidity) sensing performance in a competitively priced, solderable SIP (Single In-line Package). FEATURES POTENTIAL APPLICATIONS Molded thermoset plastic housing Refrigeration equipment Near linear voltage output vs %RH HVAC (Heating, Ventilation and Air Conditioning) Laser trimmed interchangeability equipment Low power design Medical equipment Enhanced accuracy Drying Fast response time Metrology Stable, low drift performance Battery-powered systems Chemically resistant OEM assemblies HIH-4010/4020/4021 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) 5 s Stability (at 50 %RH in 1 year) 1.2 % RH 2 Stability (at 50 %RH in 1 year) 0.5 % RH 3 Voltage supply 4 5.8 Vdc 4 Current supply 200 500 A st Voltage output (1 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 Output voltage temp. coefficient at 50% RH, 5 V mV/C -4 Operating temperature -40 -40 See Figure 1. 85 185 C F Operating humidity (HIH-4010) 0 See Figure 1. 100 % RH 5 Operating humidity (HIH-4020) 0 See Figure 1. 100 % RH 5 Operating humidity (HIH-4021) 0 See Figure 1. 100 % RH Storage temperature -50 -58 125 257 C F Storage humidity See Figure 2. % RH 5 Specific Notes: General Notes: 1. For HIH-4010/20/21-003/004 catalog listings only. Sensor is ratiometric to supply voltage. 2. Includes testing outside of recommended operating zone. Extended exposure to >90% RH causes a reversible 3. Includes testing for recommended operating zone only. shift of 3% RH. 4. Device is calibrated at 5 Vdc and 25 C. Sensor is light sensitive. For best performance, shield 5. Non-condensing environment. When liquid water falls on the sensor from bright light. humidity sensor die, output goes to a low rail condition indicating no humidity. FACTORY CALIBRATION DATA For HIH-4010-001/002/003/004 catalog listings only. HIH-4010/4020/4021 Sensors may be ordered with a calibration and data printout. See Table 2 and the order guide on the back page. TABLE 2. EXAMPLE DATA PRINTOUT Model HIH-4010-003 Channel 92 Wafer 030996M MRP 337313 For HIH-4020-001/002/003/004 and HIH-4021-001/002/003/ Calculated values at 5 V 004 catalog listings only. V at 0% RH 0.958 V OUT V at 75.3% RH 3.268 V OUT Linear output for 3.5% RH accuracy at 25 C Zero offset 0.958 V Slope 30.680 mV/%RH Sensor RH (V - zero offset)/slope OUT (V - 0.958)/0.0307 OUT Ratiometric response for 0% RH to 100% RH V OUT V (0.1915 to 0.8130) SUPPLY 2 www.honeywell.com/sensing