Vehicle Loop Detectors - Delta Scientific

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Recommending its use with all Delta and most other vehicle access control systems, Delta Scientific’s NP Series Digital Loop Detectors are programmed to prevent a closing signal when power is resumed. NP Series Loop Detectors are directly interchangeable with most other brands as a plug-in replacement.

These loop detectors provide customers with a safety detector that can prevent accidents which occur when power outages cause vehicle access control systems to reset their logic. The 3446 NP Series incorporates an advanced micro-controller that combines a powerful digital computer and the latest and most advanced inductive vehicle loop technology to give high-test reliability and accuracy when measuring, counting or detecting vehicles.

This ability helps avoid unexpected gate operations such as the raising or lowering of gate arms, sliding gate operation, motorized teeth and barricade actuation. Delta highly suggests and is seeing a wider application of vehicle loop detectors to suppress the operation of heavy gates and vehicle barricades to prevent accidental closings or raisings when authorized vehicles move through vehicle access control systems.

Typical digital loop detectors hold a gate open until the last part of a vehicle has passed the closing loop, located beyond the gate. The detector then gives a pulse on departure, instructing the gate to close after the vehicle has passed. Oftentimes, after power outages, the entire system needs to be reset. The NP Series negates this problem.

Delta NP Series Loop Detectors provide input voltages of 24 VAC, 24 VDC, 120 VAC and 230 VAC.

120 Volts, Alternating Current and Dual Relay Version
3546-3NP	FEATURES: Configured not to generate a pulse when initial power up or power resumption occurs. This can avoid unexpectd gate operations (raising or lowering of gate arms, sliding gate operation, motorized teeth and barricade actuation). Recommended for use with ALL of DELTA' S vehicle access control equipment and most other manufacturers. This is a direct replacement of a Delta model 3546-3 where power resumption safety is desired. See instructions for complete infomation.	See order forms for prices
24 Volts, Alternating Current and Dual Relay Version
3546-7NP	FEATURES: Configured not to generate a pulse when initial power up or power resumption occurs. This can avoid unexpectd gate operations (raising or lowering of gate arms, sliding gate operation, motorized teeth and barricade actuation). Recommended for use with ALL of DELTA' S vehicle access control equipment and most other manufacturers. This is a direct replacement of a Delta model 3546-7 where power resumption safety is desired. See instructions for complete infomation.	See order forms for prices
220-240 Volts, Alternating Current and Dual Relay Version
3546-8NP	FEATURES: Configured not to generate a pulse when initial power up or power resumption occurs. This can avoid unexpectd gate operations (raising or lowering of gate arms, sliding gate operation, motorized teeth and barricade actuation). Recommended for use with ALL of DELTA' S vehicle access control equipment and most other manufacturers. This is a direct replacement of a Delta model 3546-8 where power resumption safety is desired. See instructions for complete infomation.	See order forms for prices
120 Volts, Alternating Current and Dual Relay Version
3546-1	FEATURES: Presence relay is normally open or normally closed. Normally open pulse relay with pulse on arrival. Pulse relay can be set to pulse on departure. This detector has a 10-pin Amphenol military connector. Direct replacement for the APD detector and Delta 816-1 and 816-12.	See order forms for prices
120 Volts, Alternating Current with 3ft Cord and Three Prong Plug
3546-2	FEATURES: Dual relay version with standard 11-pin male connector. Presence relay is normally open or normally closed. Normally open pulse relay on arrival. Pulse relay can be set to pulse on departure. It can also be used as a direct replacement for Delta 816-2 and Cincinnati.	See order forms for prices
120 Volts, Alternating Current and Single Relay Version
3546-3*	FEATURES: Standard 11-pin male connector. Presence relay is normally open or normally closed. Normally open pulse relay with pulse on arrival. Pulse relay can be set to pulse on departure. It can be used as a direct replacement for the original Sarasota detector and Delta 816-3 or 816-11. *This is the most commonly specified detector.	See order forms for prices
120 Volts, Alternating Current and Dual Relay Version
3546-4	FEATURES: Presence relay is normally open and normally closed. Relay can be set to a pulse function on arrival or departure. Direct replacement for Delta 816-4 and DECA.	See order forms for prices
24 Volts, Alternating Current and Single Relay Version
3546-6	FEATURES: Standard 11-pin male connector. Presence normally open and nomally closed. Relay can be set to a pulse function on arrival or departure. Direct replacement for Delta 816-6.	See order forms for prices
24 Volts, Alternating Current and Dual Relay Version
3546-7	FEATURES: Standard 11-pin male connector. Presence normally open and nomally closed. Relay can be set to a pulse function on arrival or departure. Direct replacement for Delta 816-7.	See order forms for prices
220-240 Volt, Alternating Current and Dual Relay Version
3546-8	FEATURES: Standard 11-pin male connector. Presence normally open and nomally closed. Normally open pulse relay with pulse on arrival.Pulse relay can be set to pulse on departure.	See order forms for prices
120 Volts, Alternating Current and Dual Relay Version
3546-9	FEATURES: Standard 11-pin male connector. Presence relay normally open and nomally closed options. The pulse relay is normally open on arrival. Pulse relay can be set to pulse on departure. Direct replacement for Delta 816-9	See order forms for prices
24 Volts, Alternating Current and Dual Relay Version
3546-10	FEATURES: This detector uses the 10-pin Amphenol military connector. Presence nomally open and closed with the pulse relay normally open on arrival. Pulse relay can be set to pulse on departure. Direct replacement for the Delta 816-10.	See order forms for prices