HIH-4000-004

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) VOUT=(VSUPPLY)(0.0062(sensor RH) + 0.16), typical at 25 ºC 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 VOUT at 0% RH VOUT at 75.3% RH 0.826 V 3.198 V Linear output for 3.5% RH accuracy at 25 °C Zero offset Slope RH Ratiometric response for 0% RH to 100% RH VOUT 2 0.826 V 31.483 mV/%RH (VOUT - zero offset)/slope (VOUT - 0.826)/0.0315 VSUPPLY (0.1652 to 0.7952) www.honeywell.com/sensing Figure 1. Operating Environment (Non-condensing environment.) 100% 90% Relative Humidity 80% 70% 60% 50% 40% 30% 20% 10% 0% -40 -20 0 Recommended operating zone 20 40 60 80 100 80 100 Temperature ºC Operating zone limited to