HCH-1000

Installation Instructions for the HCH-1000 Series Capacitive Humidity Sensors GENERAL INFORMATION The HCH-1000 Series is a capacitive polymer sensor designed for relative humidity measurement. The sensor converts humidity value into capacitance, which can be measured electronically. Polyimide is used as a humidity sensing material because of its inherent IC (Integrated Circuit) processing compatibility, www.DataSheet4U.com reduced temperature dependence and enhanced resistance against contamination. The HCH-1000-Series is manufactured using semiconductor technology. STANDARD CHARACTERISTICS The sensor consists of a grid top electrode, a polyimide layer, and a bottom electrode. The grid top electrode on the bottom electrode provide enhanced sensitivity compared to that of a standard structure. Figure 1 shows the typical response curve in a humidity range of 0% RH to 100% RH. ISSUE 1 50018326 SENSOR OPERATING RANGE Although the HCH-1000 Series may not fail beyond the limits, as shown in Figure 2, the specification only applies to operation within the working range. FIGURE 2: OPERATING RANGE FIGURE 1: TYPICAL HUMIDITY RESPONSE (Sensitivity = 0.6 pF %RH) 390 380 370 Capacitance (pF) 360 350 340 330 320 310 300 290 280 270 0 10 20 30 40 50 60 70 80 90 100 R elative hum idity (%R H ) Sensing and Control HCH-1000 Series Capacitive Humidity Sensors SPECIFICATIONS (TA = 25 ºC [77 ºF], Input Voltage = 1 VRMS, Frequency = 20 kHz) Characteristic Normal capacitance Sensitivity H...