The classical sling psychrometer has inherent errors in measuring the true thermodynamic wet bulb.
The classical sling psychrometer has inherent errors in measuring the true thermodynamic wet bulb. Velocity over the wet bulb is critical in this measurement, and therefore the twirling speeds of a sling psychrometer becomes critical in a true measurement.
When the operator stops twirling the sling psychrometer, the wet bulb depression immediately starts rising so that by the time he takes a reading, another error results. The portable psychrometer eliminates this error by a self-contained miniature fan drawing air over the wet bulb at the correct velocity. The readings are taken while the fan is still sampling the air. National Institute of Standards & Technology traceable thermometers assure accurate temperature readings.
All battery operated psychrometers include 3 ¡°D¡± cell batteries, water bottle, instruction manual, case and three month warranty on labor, one year parts
Features
Simple, accurate, fast, reliable
Matched precision easily read thermometers
NIST traceable accuracy
Dry/wet bulb operation
Built in water reservoir
Slide rule calculator
High impact plastic housing
Degrees celsius or degrees fahrenheit scales
SPECIFICATIONS
Temperature Range
0¡Æ to 120¡ÆF, -15¡Æ to 45¡ÆC
Temperature Accuracy
¡¾1.0¡ÆF
Relative Humidity
10 to 95%
Response Time
2 minutes
Weight
12 ounces
Scale Length
5-1/2"
Batteries
3 "D" size
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CAT NO.
MODEL
DEscRIPTION
AVAIL
PRICE
VI32101
BOP-784DF & CASE
DIG. PSYCHROMETER(DEG F)W/CASE784FC C/RB BOP-784DF & CASE
Yes
637,200
VI32103
999030
OPTIONAL (2) REPLACEMENT THERMOMETERS FOR 784F (999030) FOR Battery Psychrometer