CEM DT8820 4 IN 1 ENVIRONMENT METER

The 4 in 1 digital Multi-Function Environment Meter has been designed to combine the functions of Sound Level Meter, Light Meter, Humidity Meter, and Temperature Meter. It is an ideal Multi-Function Environment Meter Instrument with scores of practical applications for professional and home use. The Sound Level function can be used to measure noise in factories, schools, offices, airports, home, etc., checking acoustics of studios, auditoriums and hi-fi installations. The Light function is used to measure illuminance in the field. It is fully cosine corrected for the angular incidence of light. The light sensitive component used in the meter is a very Stable, long life silicon diode. The Humidity/ Temperature is for use a humidity/ semiconductor sensor and K type thermocouple. Specifications: Display: Large 1999 counts LCD display with function of Lux , x10 Lux, C, F, % RH and dB, A & dB , C & dB, Lo & dB, Hi & dB, MAX HOLD, DATA HOLD indication. Polarity:  80 Automatic, ( -) negative polarity indication. Over-range: " OL" mark indication. Low battery indication: The " BAT" is displayed when the battery voltage drops below the operating level. Measurement rate: 1.5 times per second, nominal. Storage temperature: -10 C to 60 C( 14 F to 140 F) at relative humidity Auto Power Off: Meter automatically shuts down after approx.10 minutes of inactivity. Power: One standard 9V, NEDA1604 or 6F22 battery. Sound Level Measurement range:  A LO ( low) ? Weighting: 35-100 dB A HI ( High) - Weighting: 65-130 dB C LO ( low) ? Weighting: 35-100 dB C HI ( High) - Weighting: 65-130 dB Resolution: 0.1 dB Typical instrument frequency range: 30Hz-10KHz Frequency Weighting: A, C ? weighting Accuracy: 3.5 dB at 94 dB sound level, 1KHZ sine wave. Illumination Measuring Range: 20, 200, 2000, 20, 000lux ( 20, 000lux range reading x10) Accuracy:  rdg  510 dgts Repeatability:  2. Humidity/ Temperature Measurement Range: Humidity 25 ^ 95 RH Temperature 50.0 C -4 F~  -20.0 C~ 122 F ( K-type)  200.0 C -20 C~  -20.0 C~ 750 C; -4.0 F~  200 F, -4 F~  1400 F Resolution:  0.1RH, 0.1 C, 1 C/ 0.1 F, 1 F. Humidity:  RH ( at 25 C, 35 ^ 95 5RH) Response time of the humidity sensor: ^ approx. 6min. Temperature: 3% rdg 2 C( at-20.0 C+ 200.0 C) 3.5% rdg 2 C( at-20.0 C^ + 75 0 C) 3% rdg 2 F( at-4.0 F^ + 200.0 F) 3.5% rdg 2 F( at-4 F^ + 1400 F) Input Protection: 60V dc or 24V ac rms. Size( HxWxD) : 251x63.8X40mm Weight: 250g Accessories: Gift box with carrying case, batteries and user manual, K-type temperature probe, humidity probe, light probe.