ALTA Wireless Light Meter - AA Battery Powered, 900MHZ

ALTA wireless light meters measure the intensity of light in lux (luminescence/unit area), from 0 – 83,000 lux (indoor range). Perfect for light sensitive applications like museum and art gallery light monitoring. Monnit MNS2-9-W2-LS-LM Features 1,200+ foot range 12+ year battery life 80+ wireless sensors Bank-level AES security Up in 15 easy setup Global ready (900, 920, 868 & 433 MHz) LUX Sensor Specifications Sensing Technology: High Sensitivity Photodiode Sensor Material: Silicon Peak Wavelength: 580 nm Maximum Reverse Voltage: 6 V Maximum Power Dissipation: 40 mW Maximum Light Current: 500 uA Maximum Dark Current: 0.3 uA Maximum Rise Time: 8.5 ms Maximum Fall Time: 8.5 ms Maximum Operating Temperature Range: -30°C to +85°C Measurement Range: 0 - 1,000 LUX Variation Specifications Security: Encrypt-RF® (256-bit key exchange and AES-128 CTR) Accuracy: 0.5% of reading Resolution: 0.01 LUX Weight: 3.6 oz. (102 g) ALTA AA Specifications Battery Type: 2 Replaceable AA 1.5 V B