Technical Features 957seriesNo. of Infra Red Doioes17Dioes sets32Diode Sets40DiodeSets48DiodeSetsResponse Time12ms33ms41ms72msInfrared dioees range117.5mm58.8mm47.5mm40mmScanning beams94-33beams154-94beams194-118beams234-142beamsDetecting height20-1841mm20-1872mm20-1900mmDetecting range 0-4mOperation Temperature -20--+65Light Immunity sunlight proofProtection levelsee productcatalougeVibration 20 to 500Hz 4hrs per X-Y-Z axis , sinusoidal vibration 30Hz rms 30mins per X-Y-Z axisenviornment test :GB/T2423.1-GB/T2423.4