Measuring Parameters: Lux, Foot-candle | Lighting Type Selection: Tungsten, Fluorescent, Sodium, Mercury lamp | Measuring Range: 5 Lux Ranges: 1. 40 Lux; Resolution: 0.01 Lux | 2) 400 Lux; Resolution: 0.1 Lux | 3) 4,000 Lux; Resolution: 1 Lux | 4) 40,000 Lux; Resolution: 10 Lux | 5) 4,00,000 Lux; Resolution: 100 Lux | Sensor: The exclusive photo diode colour correction filter, spectrum meet C.I.E. Cosine correction factor meet standard | Large LCD display with barograph and Indicator | Zero Adj.: External adjustment by pushing button (40 Lux Range Only) |Peak Hold: To hold the peak display | Data Hold: To freeze the display value | Memory: Save the max. & min. value with recall | Power off: Auto or manual power off. | Over Range Indication: “- - - - “; Under Range Indication: “_ _ _ _” | Data Output: RS-232 serial data output | Operating Temperature:32°F to 122°F ( 0 to 50°C) | Operating Humidity: Max. 80% RH | Power Supply: DC 9V battery. 006P, MN1604 (PP3) or equivalent. | Power Consumption: Approx. DC 8 mA | Weight: 220 g/0.48 LB | Lux Meter Dimensions: 200 x 68 x 30 mm (7.9 x 2.7 x 1.2 inch) | Sensor Probe: 82 x 55 x 7 mm (3.2 x 2.2 x 0.3 inch) | Supply Scope: 1 Unit of Digital Lux Meter, Light Sensor Probe with Protection Cover, Instruction Manual and Factory Calibration Certificate | Applications: Auditoriums, Theatres, Indoor Stadiums, Schools, Labs, Night Events, Amphitheatre, OT Rooms