Supply moisture meter and sound level meter,etc.

More info:

Dew Point Meter

The 502 dew point meter can be used to measure dew point,temperauture and humidity. With battery powered,the dew point meter has a digital display and can be easily held by hand.The dew point meters are wilde used in office,home,warehous,lab room,control house,libraries,workshop house,etc.

Feature:
1.Alarm function of upper and lower limit
2.Auto power off
3.Low battery voltage indication
4.Low power consumption
5.Fahrenheit/centigrade Temperature Transition
6.Error Checking for sensor
7.Memory for the last measurement

Specification
Display way:  LCD
Measuring range:
Temperature:     -35 to +85 Deg.C.
Humidity:          0-100%RH
Dew Point:-        98 to +85 Deg.C.
Sample rate:       1 time/2 second
Response time:    Humdity test: about 4 seconds
                         Temp.Test: about 5-30 seconds
Working temp.:   main unit:0 to +50 Deg.C.
                         sensor: -35 to +85 Deg.C.
Storing temp.:     -10 to +60 Deg.C.
Resolution:        
                         Temp.:      0.01 C./0.02F.
                         Humidity:  0.03%RH 
                         Dew point:   0.01 C./0.02F.
Power:      2×AAA 1.5V battery
Dimension:    32×9.2×2.5cm