Dew Point Meter DT-222D
 
Features
?   Able to measure Humidity, Temperature, Wet Bulb Temperature, Dew Point Temperature.
?   Used  the  exclusive  MICRO-COMPUTER  LSI  circuit and crystal time base to offer the high accuracy meas-urement & fast measuring time.
?   Digital display gives exact reading with no guessing or errors.
?   Wide measuring range & high resolution.
?   The  Last Values / Max. Values / Min. Values  of  both  Humidity and Temperature will be  automatically stored in memory and can be displayed by turn. 
?   The use of durable, long-lasting components, including a  strong,  light  weight ABS-plastic  housing  assures maintenance  free  performance  for  many  years.  The housing has been carefully shaped to fit comfortably in either hand.
Specifications

Display		10 mm LCD
Measuring Range	Humidity	10 ～ 95 %RH
	Temp.	-10 ～ 60 °C（14 ~ 140 °F）
	Wet Bulb Temp.	-10 ～ 60 °C（14 ~ 140 °F）
	Dew Point Temperature	-40 ～ 40 °C（- 40~104 °F）
Resolution	Humidity	0.1 %RH
	Temp.	0.1 °C / 0.1 °F
	Wet Bulb Temp.	0.1 °C / 0.1 °F
	Dew Point Temperature	0.1 °C
Accuracy	Humidity	2.5% ± 1% RH
	Temp.	± 0.5 °C
	Wet Bulb Temp.	± 0.5 °C
	Dew Point Temperature	± 1 °C
Sensor Type	Humidity	Capacitor
	Temp.	Resistance
Sampling Time		0.4 Seconds
Memory		Last Value, Max. Value, Min Value
Time Base		Quartz Crystal
Power Supply		4 x 1.5 V AAA Size (UM-4) Battery