SOUND LEVEL METER Features: Rugged 5-in-1 environmental meter with tripod mount and RS-232 PC interface Large dual LCD simultaneous display of Temperature and Air Velocity or Relative Humidity Characters on display reverse direction depending on Hygro-Thermo-Anemometer or Light-Sound Mode Data Hold, Min/Max, Auto power off, Low Battery/Overrange indication Built-in low friction vane wheel improves accuracy of air velocity in ft/min, MPH, m/s, km/h, and Knots Built-in precision thin-film capacitance humidity sensor for fast response Built in thermistor for ambient temperature measurements Type K input measures temperature to 2372° (1300°C) Utilizes precision photo diode and correction filter for Cosine and color corrected light measurements Sound Level measurement meets IEC 61672 class 2 using A frequency weighting and fast response time The Extech EN300 Hygro-Thermo-Anemometer-Light-Sound Meter measures Humidity, Temperature, Air Velocity, Light and Sound. The large dual LCD simultaneously displays Temperature and Air Velocity or Relative Humidity. Characters on display reverse direction depending on Hygro-Thermo-Anemometer or Light-Sound mode. Built-in precision thin-film capacitance humidity sensor for fast response and a thermistor for ambient temperature measurement. It utilizes precision photo diode and correction filter for Cosine and color corrected light measurements. Type K input measures temperature to 2372° (1300°C) using an optional Type K probe. Sound Level measurement meets IEC 61672 class 2. Includes: Meter Type k thermocouple probe Vane wheel Windscreen Pouch case 1.5V AAA batteries Specifications: Air velocity ft/min range: 80 to 5910 ft/min ft/min resolution: 1ft/min ft/min basic accuracy: ±3% FS m/s range: 0.4 to 30m/s m/s resolution: 0.1m/s m/s basic accuracy: ±3% FS km/h range: 1.4 to 108km/h km/h resolution: .01km/h km/h basic accuracy: ±3% FS MPH range: 0.9 to 67MPH MPH resolution: 0.1PMH MPH basic accuracy: ±3% FS Light Foot candles range: 0 to 1860Fc Foot candles resolution: 0.1Fc Foot candles basic accuracy: ±(5% rdg + 8d) Lux range: 0 to 20,000Lux Lux resolution: 1Lux Lux basic accuracy: ±(5% rdg + 8d) Relative humidity RH range: 10 to 95%RH RH resolution: 0.1%RH RH basic accuracy: ±4%RH of rdg Temperature Thermistor range: 32 to 122°F (0 to 50°C) Thermistor resolution: 0.1° Thermistor basic accuracy: ±2.5°F/ 1.2°C Type k range: -148 to 2372°F (-100 to 1300°C) Type k resolution: 0.1 Type k basic accuracy: ±(1%+2°F1°C) of rdg Sound dB range: 35 to 150dB dB resolution: 0.1dB dB basic accuracy: ±1.4dB Frequency range: 31.5 to 8,000Hz General Weighting/response: A weighting/fast response Power: 6 X AAA batteries Dimensions: meter, 9.8 x 2.8 x 1.3" (248 x 70 x 34mm); vane, 1.2" (31mm) Weight: 11.8oz (335g)