http://www.channeleco.com/en/Item/Show.asp?m=1&d=1211
QT-03 series Button Temp/HR logger is used to measure the air temperature and relative humidity or soil temperature. The meter is small in size and has a stainless steel shell.
QT-03 Button Data Loggers are water resistant, powerful, and exceptionally affordable. The QT-03-2 Temperature Logger will log 8,000 measurements, while the QT-03-1 Temp/RH Logger will record 4,000 measurements - 2,000 each for temperature and humidity. They log temperatures features a battery life of up to 10 years, depending on measurement interval. Actual size is 17.35 mm x 5.89 mm.

Features
	-  Water resistant (IP56) stainless steel case
-  Log4,000 to 8,000 intervals
- Internal sensors
-  Integral non-replaceable battery
- Choose from temperature-only or temperature/humidity models
Technical parameters
	
		
			| Model | QT-03-1 | QT-03-2 | 
		
			| Built-in sensors | Temp/RH | Temperature | 
		
			| Measurement range of Temp | -20~+85℃ | -40~+85℃ | 
		
			| Measurement Accuracy of Temp | ±0.6℃(-15~+65℃) | ±0.6℃(-15~+65℃) | 
		
			| Measurement range of Humidity | 0~100%, | —— | 
		
			| Measurement accuracy of Humidity | ±5% |   | 
		
			| Data storage capacity | 4000 records | 8000 records | 
		
			| IP grade | IP56 | IP56 | 
		
			| Material | Stainless steel | Stainless steel | 
		
			| Power | Built-in battery with 10 yrs of  life | Built-in battery with 10 yrs of life | 
		
			| Dimension | 17.35 mm x 5.89 mm | 17.35 mm x 5.89 mm | 
	
 
 
Origin: China
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