FLEET AND TRANSPORTATION 23-50 BACK-UP ALARMS Back-Up Sentry Alarm Decibel Output Voltage Requirements Mounting Size Item No. Pkg. Qty. 107 12 – 36V DC Universal Mount, Slotted Holes, 4" Centers 5"W x 3"H x 2.75"D NS153751 1 For use on fire trucks, ambulances, cement mixers, buses, refuse trucks, dump trucks and ground support vehicles. • Solid state electronics • Conforms to SAE J994 criteria • Meets OSHA, Bureau of Mines, GSA “K-Spec” and all state regulations • Sound ratings are ±4 dB at 4 feet – 60 pulses per minute • Sealed in epoxy against dust, moisture and vibration • Extreme temperature operating range: –40°F to +185°F (–40°C to +85°C) Decibel Output Voltage Requirements Mounting Size Item No. Pkg. Qty. 97 12 – 24V DC Universal Mount, 3" to 3.25" Centers 4"W x 2.6"H x 1.6"D NS153752 1 For use on light-duty vehicles. Self-grounding. Can be used on UL-approved electrical systems without affecting the approval. Back-up Sentry Alarm for Light-Duty Vehicles Decibel Output Voltage Requirements Mounting Size Item No. Pkg. Qty. 87 36 – 72V DC Universal Mount, 3" to 3.25" Centers 4"W x 2.6"H x 1.6"D NS153753 1 For use on electric lift trucks. Self-grounding. Can be used on UL-approved electrical systems without affecting the approval. Back-Up Sentry Alarm for Electric Lift Trucks Decibel Output Voltage Requirements Mounting Size Item No. Pkg. Qty. 82 – 102 12 – 24V DC Universal Mount, 3" to 3.25" Centers 5"W x 2.6"H x 2.75"D NS152634 1 Back-Up Sentry Alarm, Automatic Volume-Adjusting, Light-Duty For use on light-duty vehicles. Self-grounding. Can be used on UL-approved electrical systems without affecting the approval. Decibel Output Voltage Requirements Mounting Size Item No. Pkg. Qty. 82 – 107 12 – 24V DC Universal Mount, 3.75" to 4.5" Centers 5"W x 3"H x 2.7"D NS153749 1 Back-Up Sentry Alarm, Automatic Volume-Adjusting, Compact Compact unit can be used for same applications as 90451. Can be used on UL-approved electrical systems without affecting approval. Decibel Output Voltage Requirements Mounting Size Bracket Grommet Item No. Pkg. Qty. 87 – 112 12 – 24V DC Flush Mount with 4.5" Rear Lighting Grommet 4.2" Dia., 2.75"D NS131648 NS146505 NS153750 1 Back-Up Sentry Alarm, Automatic Volume-Adjusting, Heavy-Duty For use on heavy trucks, tractors and trailers, dump, utility and delivery vehicles. Mounts with Bracket No. NS131648 and Grommet No. 83280. Decibel Output Voltage Requirements Mounting Size Item No. Pkg. Qty. 82 – 107 12 – 24V DC Universal Mount, Slotted Holes, 4" to 5" Centers 5.7"W x 4"H x 3.4"D 90451 1 For use on rubber-tired equipment, trucks, buses and industrial vehicles. Can be used on UL-approved electrical systems without affecting approval. Back-Up Sentry Alarm, Automatic Volume-Adjusting • Monitors the environmental noise level and automatically changes volume to maintain a minimum of 5 dB louder • Equipment can be safely operated in environments of varying noise levels • Increases safety and reduces irritation, hearing impairment and complaints • Voltage spike polarity protected • Positive or negative ground systems • Current draw is less than 0.5A • Nylon housing
