HCH-1000 Series Capacitive Humidity Sensors DESCRIPTION The HCH-1000 series humidity sensor is a capacitive polymer sensor designed for relative humidity measurement. The sensor converts humidity value into capacitance, which can be The sensor consists of a grid top electrode, a polyimide layer, and a bottom electrode. The grid top electrode on the bottom electrode provides enhanced sensitivity when compared to that of a standard structure. measured electronically. Polyimide is used as a humidity sensing material because of its A cased version, for dust protection, and an uncased version are available. inherent IC (Integrated Circuit) processing compatibility, reduced temperature dependence and enhanced resistance against contamination. The HCH-1000-Series is manufactured using semiconductor technology. FEATURES AND BENEFITS Polymer sensing offers enhanced resistance against POTENTIAL APPLICATIONS Industrial contamination Air compressors Reduced temperature dependence Battery-powered systems Semiconductor fabrication technology Drying equipment Uses glass wafer as substrate HVAC (includes air conditioning, air movement, Enhanced sensitivity and accuracy provides fast response thermostats, humidifiers, de-humidifiers, humidistats, Low hysteresis and long-term stability enthalpy sensing) OEM assemblies Office automation equipment Process equipment Refrigeration (includes bulk and transport systems) Telecommunications cabinets Weather stations and meteorology equipment Medical Hospital air compressors Infant incubators Microenvironments Sleep apnea equipment Treadmill stress monitoring equipment HCH-1000 Series Table 1. Specifications (TA= 25 ºC [77 ºF], Input Voltage = 1 VRMS, Frequency = 20 kHz) Characteristic Condition Min. Typ. Normal capacitance at 55 %RH 310 330 Sensitivity 10 %RH to 95 %RH 0.55 0.60 Humidity hysteresis – – ±2 Linearity – – ±2 Response time 30 %RH to 90 %RH – 15 Temperature coefficient 5 °C to 70 °C [41 °F to 158 °F] 0.15 0.16 Long-term stability (drift) – – 0.2 Operating temperature range – -40 [-40] – Operating humidity range – 0% – Operating frequency range – 1 – Figure 1: Frequency Characteristics Max. 350 0.65 – – – 0.17 – 120 [248] 100% 100 Unit pF pF/%RH %RH %RH sec pF/°C %RH/year °C [°F] RH kHz Figure 2: Typical Humidity Response (Sensitivity = 0.6 pF/%RH.) 390 380 Capacitance (pF) 370 360 350 340 330 320 310 300 290 280 270 0 10 20 30 40 50 60 70 Relative humidity (%RH) Figure 3: Temperature Characteristics (At 1 VRMS and 20 kHz.) 2 www.honeywell.com/sensing 80 90 100 Capacitive Humidity Sensors Figure 4: Mounting Dimensions (For reference only: mm [in].) HCH-1000-001 HCH-1000-002 ENVIRONMENTAL TEST SYSTEM For a precise measurement, a hygrometer is compared with Figure 5 depicts environmental testing. The devices are the humidity of the temperature-humidity chamber. characterized at 25 °C [77 °F] between 20 %RH and 95 %RH. The meter is set to measure capacitance at 1 V and 20 kHz. The data output indicates the effect of sensor characterization before/after environmental tests. Figure 5: Environmental Test System Diagram Honeywell Sensing and Control 3 Order Guide Catalog Listing Description HCH-1000-001 HCH Series capacitive polymer humidity sensor, 2,54 mm [0.100 in] lead pitch SIP HCH-1000-002 HCH Series capacitive polymer humidity sensor, 2,54 mm [0.100 in] lead pitch SIP, cased version WARNING WARNING PERSONAL INJURY MISUSE OF DOCUMENTATION DO NOT USE these products as safety or emergency stop devices or in any other application where failure of the product could result in personal injury. Failure to comply with these instructions could result in death or serious injury. 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. Failure to comply with these instructions could result in death or serious injury. WARRANTY/REMEDY Honeywell warrants goods of its manufacture as being free of defective materials and faulty workmanship. Honeywell’s standard product warranty applies unless agreed to otherwise by Honeywell in writing; please refer to your order acknowledgement or consult your local sales office for specific warranty details. If warranted goods are returned to Honeywell during the period of coverage, Honeywell will repair or replace, at its option, without charge those items it finds defective. The foregoing is buyer’s sole remedy and is in lieu of all other warranties, expressed or implied, including those of merchantability and fitness for a particular purpose. In no event shall Honeywell be liable for consequential, special, or indirect damages. While we provide application assistance personally, through our literature and the Honeywell web site, it is up to the customer to determine the suitability of the product in the application. 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. SALES AND SERVICE Honeywell serves its customers through a worldwide network of sales offices, representatives and distributors. 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 Sensing and Control Honeywell 1985 Douglas Drive North Golden Valley, MN 55422 www.honeywell.com/sensing 000699-2-EN November 2011 Copyright © 2011 Honeywell International Inc. All rights reserved.