In one meter lenght probe are placed two sensors : for temperature and for humidity.
First imporant thing is sensors accuracy. I make one litle test accuracy , i compare this digital termometer- hygrometer with testotherm wich i use in work. Testotherm is high tech cost expensive with ultra high accuracy for themperature and humidity i use one two testoterm in my laboratory. Testotherm is calibrated in the laboratory every year for certficate.
What are the results of the test ?
Results see in picture:
Testotherm showing 26.6°c for temperature and 35.4% for humidity
Digital thermometer – hygrometer showing similar results
… for temperature and .. for humidity
I repeated the test 3 times always the result was the same
My verdict is that the thermometer hygrometer relative to price is a usefull thing.
It is very accurate and fairly quickly stabilizes
Where do I buy this combined digital humiditymeter with thermometer ?
I bought it on ebay and the price was around $3.24 USD + free shipoing is good price for this thing.It also for sale on DX but the price is 6.5 usd . Link on DX shop thermometer + hygrometer.
Digital Hygrometer-Thermometer description and specification:
Temperature Range: -50°c ~ 70°c (-58°F~ +158°F )
Measuring Humidity Range: 10% RH ~ 99% RH
Humidity Display Resolution: 1% RH
Temperature Accuracy: 1°C
Operating Voltage: 1.5v, or LR44 batteries(Include)
Sampling Period: 10S
Dimension: 48 x 28.5 x 15.2mm
LCD Dimension: 40 x 22.5mm
Installation dimensions:46 x 27 x 13.5mm
Net Weight: 45g
Package weight: 53g
Color: White or Black
1 x Digital Thermometer Hygrometer
2 x LR44 batteries(1 pair)
- Lift the stand at the back of the unit
- Slidingly open the battery cover as per the arrow indication
- Slightly Inset one or two button cells into the battery housing(note the polarity)
- Close the battery cover.
- Two button battery LR44 Two battery packed in PE bag seperately
Digital Thermometer Hygrometer is usefull thing for for the measuring the outdoor / internal temperature.This hygrometer has a probe,which can test some places humidity exactly. It was used widely.It is very usefull to the hatchery.