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Temperature and Relative Humidity Sensor |
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Temperature and Relative Humidity Sensor |
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| Home | Products | Ordering Information | Order Tracking | Photo Gallery | Live Data Sites | Contact Information | |
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IntroductionOur temperature and relative humidity sensor is high quality and low cost. We utilize a precision calibrated sensor module and surround it with tough interface electronics and rugged potted case. The sensor can measure temperature from -26°C to 70°C (-15°F to 158°F) and relative humidity from 3% to 100%. The sensor comes standard with a 3 meter (10 foot) CAT5e cable that is ready to connect with our Wind Data Logger. A sensor with unterminated shielded cable is available as a special order item. Photos of the sensor in action can be found in the photo gallery. Specifications
Technical DetailsSchematicA schematic is available. Wind Data Logger ConfigurationThe temperature and relative humidity (tempRH) is plugged into the "TEMP&ADC" connector on the Wind Data Logger using a straight through cable / patch cord. If you wish to use the included temperature sensor you should use an 8Y splitter. To display actual sensor readings on the Wind Data Logger you will need to configure the ADC channels. The following equations are used to convert the voltage output from the sensors to standard units: Temperature:°C=39.394*Vin - 30.0 (ADC M: 39.394 / ADC B: -30.0 / ADC Units: C)°F=70.9092*Vin - 22.0 (ADC M: 70.9092 / ADC B: -22.0 / ADC Units: F) Relative Humidity:%RH=30.303*Vin (ADC M: 30.303 / ADC B: +0.0 / ADC Units: %)The values in parenthesis should be entered into the ADC setup screens on the Wind Data Logger. MountingThe sensor electronics are potted in a flexible polyerethane potting compound inside a small ABS plastic potting box. This protection allows the sensor to be used indoors with no additional protection. For outdoor use the sensor must be protected from direct moisture contact. For accurate temperature and relative humidity readings the sensor must have air flowing over it. We recommend that the sensor be protected by a solar radiation shield. APRS World sells a solar radiation shield, or a shield may be homebrewed or purchased from another source. 
Example DataThe following data was capture on 2006-11-09 near Winona, Minnesota, USA. Weather conditions observed at the local airport can be found at:http://www.wunderground.com/history/airport/KONA/2006/11/9/DailyHistory.html Note that the local airport is approximately 15 miles distant. Temperature Plot
Relative Humidity Plot
Raw DataThe raw data used to generate these plots is available as example_wiscoy.csv. Note that this data has been exported from our SQL database and is in a slightly different format than what is stored by the Wind Data Logger. |
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Click on photo to enlarge
