Sensors & Switches

Plastic request to exit (RTE) proximity switch with green hand logo

• Operate with no physical contact
• 12V DC Working
• Easy clean
• Optional bleep & LED indication
• Green hand logo

DA421: Narrow proximity switch

• Proximity-operated
• 12V DC-Operating
• SPCO relay switching
• Optional sounder & LED

Activated through close proximity, these request to exit (RTE) switches control a single-pole change-over (SPCO) relay with normally-closed or normally open contacts. Uses include signalling or switching of automatic doors, locks or any electronic equipment using the SPCO clean relay contacts.

DA123-S: Surface-mounting

• Weather-resistant white or black casing
• Optional: LED indication
• Optional: Tamper-loop
• Optional: Buzzer
• Mounting kit included

Available within a white or black casing these weather-resistant surface-mounting push-button with buzzer sounder, security tamper-loop or LED indicator options are ideal for final exit buttons in security applications and much more.

DA123-F: Flush

• Weather-resistant white or black casing
• Optional: LED indication
• Optional: Tamper-loop
• Mounting kit included

Available within a white or black casing these weather-resistant surface-mounting push-button with buzzer sounder, security tamper-loop or LED indicator options are ideal for final exit buttons in security applications and much more.

DA125: Expanding foam detector

• LED indication
• Switch rating 30V DC 100mA
• 2 years warranty

This small PCB unit is for detecting the use of expanding foam into equipment such as sounders, bells or other security devices.

12V DC Mains power failure detector

• Mains present indication
• Fault indication (follows relay)
• Alarm relay, SPST 30V DC 1A
• Tamper-switched ABS enclosure
• 12V DC-powered
• Made in Britain with 5 year warranty

DA223: Contacted door lock keep

• Brushed stainless steel faceplate
• Supply voltage 12V DC
• Supplied with 1m, 3 core cable

The DA223 is a door lock keep; this unit replaces an existing lock keep. There is a single-pole change-over (SPCO) contact that is actuated when the lock bolt is thrown. Typical uses for these units are for final setting of an intruder alarm system or for monitoring whether perimeter doors are locked.

DA225: Setting inhibitor

• Key switch operated relays
• Tamper switch

This unit was originally designed to inhibit setting of an intruder alarm system after an alarm activation. With its double-pole key switch, double-pole relay and LED, it can be used in many other applications where a relay and key switch are required. Typically used for inhibiting systems for testing such as fog bandit, smoke cloak and Smart water systems.

DA228: High-security key switch

• Key switch operated relays
• Tamper switch

A handy high-security key switch with DPCO (double-pole change-over) contacts housed in a die-cast aluminium enclosure with security screws, complete with LED and tamper connections. Typical uses include to override equipment such as magnetic locks or electronic releases in the event of an access control system failure.

DA290:
12V battery automatic isolator

• Low 12V battery isolator with 9V disconnect
• Automatically disconnect and re-connect depleted batteries
• Protect against deep cycle damage
• Current consumption <50mA
• Fault indication, follows relay
• Made in Britain with 5 year warranty

DA291:
12V battery automatic isolator

• Low 12V battery isolator with 11V disconnect
• Automatically disconnect and re-connect depleted batteries
• Protect against deep cycle damage
• Current consumption <50mA
• Fault indication, follows relay
• Made in Britain with 5 year warranty

DA292:
24V battery automatic isolator

• Low 24V battery isolator (22V disconnect)
• Automatically disconnect and re-connect depleted batteries
• Protect against deep cycle damage
• Current consumption <50mA
• Fault indication, follows relay
• Made in Britain with 5 year warranty

Plastic request to exit (RTE) proximity switch with green person logo

• Operate with no physical contact
• 12V DC Working
• Easy clean
• Optional bleep & LED indication
• Green person logo

Infra-red Proximity Sensor

• Proximity-operated, no physical contact required
• Current consumption <30mA
• Relay contact rating SPST 30V DC 1A
• Detection range up to 75mm
• Tamper switch

A multi-purpose sensor designed to detect the presence or absence of a nearby surface. An infra-red beam is transmitted from the unit and is reflected back by a nearby object or surface (up to 75mm).

Pre-wired micro-switch for monitoring mortice locks

• Ideal for monitoring if mortice locks are engaged
• Supplied with 4 core cable
• Tamper-loop