The CMB-50 Series sensor provides Bi-Directional High Bay Aisle Way sensing extending 70 to 110 feet when mounted at heights of 30 to 45 feet. HID Bi-Level or T-5 / T-8 Fluorescent systems can be switched using this sensor and the PP-20-SH and PP-20 Power Packs respectively. The sensors view pattern provides coverage of the lighting areas of three typically spaced High Bay fixtures. Therefore, when mounted directly to a fixture, the coverage area extends out to the area that is lighted by the neighboring fixtures. This effect is useful with some Program-Start ballasts that have a delay such that when traveling in a fork-lift truck, lighting needs to be initiated On ahead of the truck. The CMB-50 installs to a junction box or fixture with a 1/2 inch knockout. The CMB-50 is often used with the HMB-10 end of aisle way sensor, and/or the CMB-6 High Bay 360 degree View sensor for total aisle way sensing. For freezer or high humidity applications, use the CMB-50-LT version which allows for cold temperatures or condensing humidity. Masking the sensor to cutoff at the end of an aisle can also be done with the enclosed kit.