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Digital Dew Point Meter - Thermo-Hygrometers
Responds fast to changes in humidity and temperature
Displays three channels: relative humidity, air temperature and surface temperature
When the Hold button is held the unit displays Dewpoint and Delta T
Also known as a hygrometer, thermohygrometer, dewmeter, dew meter, dew point meter, humidity gauge and relative humidity gauge. All are climatic condition monitors. 
Features

- Simultaneously displays three channels: relative humidity, temperature of the air and surface temperature
- When the Hold button is held the unit displays Dewpoint and Delta T (the difference between dewpoint and surface temperature).
- When the integral Surface Temperature probe is removed, all K type probes can be used; temperature up to 1300 deg C. Magnetic surface temperature probe on a lead is available.
- Auto power off (selectable)
- Hold and Max/Min functions
- ºC/ºF switchable
Additional DewLogger Features - Measures and records air temperature, surface temperature, relative humidity and dewpoint for transfer to PC for evaluation and printing.
- Clock/Time function
- Memory for 16,000 readings per channel
- Kit includes integral surface probe, interface cable (RS-232) and datalogger software.

Specifications

| Range | Accuracy | Resolution | Temperature |
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| Air/RH Probe | -20º to 60ºC | ±0.7ºC | 0.1ºC | K-type input | -200º to 1370ºC |
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| -200º to 200ºC | ±0.3%rdg+1ºC | 0.1ºC |
| 200º to 400ºC | ±0.5%rdg+1ºC | 1ºC |
| 400º to 1370ºC | ±0.3%rdg+1ºC | 1ºC | Relative Humidity | 0 to 100% RH | ±2.5% RH | 0.1% | Dimensions | 184 x 64 x 30mm (7.2" x 2.5" x 1.2") | Weight | 320 g (11.3 oz) | Power | 9V (100 hrs logging) | DewLogger Model | Recording Interval | 1s to 1hr 40 min (1 to 99min 99 sec) | Memory | 16,300 readings |

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