DESCRIPTION The HIH-4000 Series delivers instrumentation-quality RH The HIH-4000 Series Humidity Sensors are designed (Relative Humidity) sensing performance in a competitively specifically for high volume OEM (Original Equipment priced, solderable SIP (Single In-line Package). Manufacturer) users. Available in two lead spacing configurations, the RH sensor is Direct input to a controller or other device is made possible by a laser trimmed, thermoset polymer capacitive sensing this sensor’s near linear voltage output. With a typical current element with on-chip integrated signal conditioning. draw of only 200 µA, the HIH-4000 Series is often ideally suited for low drain, battery operated systems. The sensing element's multilayer construction provides excellent resistance to most application hazards such as Tight sensor interchangeability reduces or eliminates OEM wetting, dust, dirt, oils and common environmental chemicals. production calibration costs. Individual sensor calibration data is available. 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

Table 1. Performance Specifications (At 5 Vdc supply and 25 ºC [77 ºF] 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) – 1.2 – % RH – Voltage supply 4 – 5.8 Vdc 2 Current supply – 200 500 µA – Voltage output (1st order curve fit) V =(V )(0.0062(sensor RH) + 0.16), typical at 25 ºC OUT SUPPLY Temperature compensation True RH = (Sensor RH)/(1.0546 – 0.00216T), T in ºC Output voltage temperature, coefficient at – -4 – mV/ºC 50% RH, 5 V Operating temperature -40[-40] See Figure 1. 85[185] ºC[ºF] – Operating humidity 0 See Figure 1. 100 % RH 3 Storage temperature -50[-58] – 125[257] ºC[ºF] – Storage humidity See Figure 2. % RH 3 Specific Notes: General Notes: 1. Can only be achieved with the supplied slope and offset. Sensor is ratiometric to supply voltage. For HIH-4000-003 and HIH-4000-004 catalog listings only. Extended exposure to >90% RH causes a reversible shift 2. Device is calibrated at 5 Vdc and 25 ºC. of 3% RH. 3. Non-condensing environment. Sensor is light sensitive. For best performance, shield sensor from bright light. FACTORY CALIBRATION DATA HIH-4000 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-4000-003 Channel 92 Wafer 030996M MRP 337313 Calculated values at 5 V V at 0% RH 0.826 V OUT V at 75.3% RH 3.198 V OUT Linear output for 3.5% RH accuracy at 25 °C Zero offset 0.826 V Slope 31.483 mV/%RH RH (V - zero offset)/slope OUT (V - 0.826)/0.0315 OUT Ratiometric response for 0% RH to 100% RH VOUT VSUPPLY (0.1652 to 0.7952) 2 www.honeywell.com/sensing

Figure 1. Operating Environment (Non-condensing environment.) 100% 90% 80% 70% y t di mi 60% u H 50% e v ti 40% a el R 30% 20% 10% 0% -40 -20 0 20 40 60 80 100 Recommended operating zone Temperature ºC Operating zone limited to <50 hours No specification zone Figure 2. Storage Environment (Non-condensing environment.) 100% 90% 80% 70% y t di mi 60% u H 50% e v ti 40% a el R 30% 20% 10% 0% -40 -20 0 20 40 60 80 100 120 140 Recommended storage zone Temperature ºC Honeywell Sensing and Control 3

TYPICAL OUTPUT VOLTAGE VS RELATIVE HUMIDITY (at 25 ºC and 5 V) 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) TYPICAL OUTPUT VOLTAGE (BFSL) VS RELATIVE HUMIDITY (at 0 ºC Figure 4. Typical Output Voltage (BFSL) vs Relativea Hnudm 7i0d ºitCy, (5A Vt )0 ºC, 70 ºC 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

Figure 5. Mounting Dimensions (For reference only. mm/[in]) HIH-4000-002 HIH-4000-001 HIH-4000-004 HIH-4000-003 HIH-4000-005 4,17 4,17 2,03 [0.164] [0.164] [0.080] 8,59 8,59 [0.338] [0.338] 1,91 [0.075] 12,2 MIN. 12,7 MIN. [0.48] [0.50] -ve +ve -ve +ve OUT OUT 0,89 3X 0,38 3X 0,38 [0.035] 1,27 [0.015] [0.015] [0.050] 2,54 2,54 2,54 [0.100] [0.100] [0.100] Figure 6. Typical Application Circuit + Ve Supply Voltage (5 V) HIH-40XX OUT VOLTAGE OUT - Ve 80 Minimum kOhm Load 0 V ORDER GUIDE Catalog Listing Description HIH-4000-001 Integrated circuit humidity sensor, 2,54 mm [0.100 in] lead pitch SIP HIH-4000-002 Integrated circuit humidity sensor, 1,27 mm [0.050 in] lead pitch SIP HIH-4000-003 Integrated circuit humidity sensor, 2,54 mm [0.100 in] lead pitch SIP, calibration and data printout HIH-4000-004 Integrated circuit humidity sensor, 1,27 mm [0.050 in] lead pitch SIP, calibration and data printout HIH-4000-005 Equivalent to HIH-4000-001 ADDITIONAL 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 Honeywell Sensing and Control 5

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