4 in 1 multi-purpose environmental tester DT-8820

4 in 1 multi-purpose environmental tester Model: DT-8820 Instrument: 4-in-1 multi-purpose environmental tester is a collection of sound velocity meter, brightness meter, hygrometer and thermometer as one of the instruments for industrial and civil. Range can be used to test the sound level in factories, schools, offices, airports and home noise. Detecting corresponding fidelity devices. Luminosity function is used to test whether there is sufficient lighting brightness, light sensor performance is stable. Temperature and humidity function is performed by a semiconductor humidity sensor and a K-type thermocouple completed. Features: four functional test sound, light, humidity, and temperature display shows great light, temperature, humidity, and C sound level, A sound level indicating light is easy to use test ranges 0.01luxto20,000lux sound level range: A sound level bass 35-100dB A sound level bass 65-130dB C sound level bass 35-100dB C sound level bass 65-130dB Resolution: 0.1dB humidity measuring range: 25% RH-95% RH, 0.1% RH resolution and fast Sampling time temperature measuring range: -20.0 ℃ ~ + 750 ℃ ??/ -4 ℉ ~ + 1400 ℉ Specifications: Monitor: 1999 big screen can display light (x10), temperature (℃, ℉), humidity and sound level (C, A sound level, high, low decibel), maximum and data retention. Polarity: positive and negative polarity indication overload: \ "; OL \"; Overload indication Low battery indicator: When the battery power is low, \ "; BAT \"; will appear on the display Measurement speed: 1.5 times per second memory Without the operation of this table, the 10 seconds automatic shutdown battery:: Temperature: -10 ℃ to60 ℃ (14 ℉ to140 ℉), <80% relative humidity automatic shutdown feature a 9V, NEDA1604 or 6F22 battery sound velocity measurement range: A 35-100dB A bass sound level sound level bass 65-130dB C sound level bass sound level bass 65-130dB 35-100dB C Resolution: 0.1dB test frequency range: 30Hz-10KHz frequency sound level: A, C sound level accuracy: ± 3.5dB-94dB1KHZ photometric range: 20,200,2000,20,000lux Accuracy: ± (5% rdg + 10) Repeatability: ± 2% humidity / temperature measuring range: humidity 25% ~ 95% RH Temperature (K-type temperature probe) -20.0 ℃ ~ + 50.0 ℃ -4 ℉ ~ + 122 ℉ -20.0 ℃ ~ + 200.0 ℃ -20 ℃ ~ + 750 ℃; -4.0 ℉ ~ + 200 ℉, -4 ℉ ~ + 1400 ℉ Resolution: 0.1% RH, 0.1 ℃, 1 ℃ / 0.1 ℉, 1 ℉ Humidity: ± 5% RH (at above 25 ℃ is 35% ~ 95% RH) sensor response time: about 6 minutes temperature: ± 3% rdg ± 2 ℃ (at-20.0 ℃ ~ + 200.0 ℃) ± 3.5% rdg ± 2 ℃ (at-20.0 ℃ ~ + 750 ℃) ± 3% rdg ± 2 ℉ (at-4.0 ℉ ~ + 200.0 ℉) ± 3.5% rdg ± 2 ℉ (at- 4 ℉ ~ + 1400 ℉) input voltage protection: 60V DC or 24V AC Dimensions (HxWxD): 251x63.8X40mm Weight: 250g