Product information:
Dimensions: 132*60*38 (mm)
Product use: measuring light intensity
Specification: English, Chinese
Performance characteristics: W/m² and Btu two unit options, 4-1/2 digits display, data retention function, wide range without shifting
The price is more than 50$, not responsible for any after-sales, mind not to shoot

Three technical indicators:
Resolution: 0.1W/m², 0.1 Btu/(ft²-h)
Range error: ±10W/m²[±3 Btu/(ft²-h)] or ±5% of measured value
Temperature error: ±0.38W/m²/℃[±0.12Btu/(ft²-h)/℃] when it deviates from 25℃
Display: 4-1/2 LCD display, maximum display value 19999, overload display "OL"
Drift: <±3%/year
Measuring range: 0.1～1999.9 W/m²0.1～1999.9 Btu/(ft²-h)
Wavelength range: 340～1100nm, the incident angle extends within ±45 degrees from the normal direction
Sampling time: 0.25 seconds/time
Operating temperature and humidity: 0～40°C less than 80%RH
Storage temperature and humidity: -10～50°C less than 70%RH
Size and weight: 132(L) x 60(W) x 38 (H)mm
Battery life: about 100 hours

Instructions:
1. According to the schematic diagram of the positive and negative electrodes in the battery compartment, after the battery is correctly installed, press the "" key to turn on, the instrument enters the Measurement state, and the default unit of power on is W/㎡.
2. Press the "W/B" key to select the unit W/m² or Btu according to your needs.
3. After the unit is selected, perform the measurement. Cover the photosensitive measurement window with your hand. The screen displays 000.0 or 000.1 indicating that the meter is working normally and The measurement can be started.
4. During the measurement process, press the "HOLD" key, the LCD screen displays "H", and the displayed value is locked at the same time, press the "HOLD" key again to exit the data hold function and Continue the measurement.
5. After the measurement is completed, press the "" key to shut down.

Packing list:
Measuring instrument + manual *1