Our Product Range Consists of:
Flange & Foot Mount Motors Automatic Swing & Sliding Doors High Speed Motors Fire Door Motors Sectional Door Motors Direct Drive Motors Tube Motors Powered Blinds and Awnings Barrel Assembly Sliding Door Gear Safety Equipment Intercom Systems/Access Controls Gate & Barrier Automation Training Courses Garage Door Operators

Loop Detectors

Ellard’s loop detectors are designed to be buried in proximity to a gate, traffic barrier, or shutter (for example at a car park entrance).

  • Description

    Loop detectors allow discreet access control systems that let you hide the workings, avoiding the disruption of the aesthetic of your property.  Vehicle detection loops can detect vehicles passing or arriving at a certain point, for instance approaching a traffic light or in motorway traffic

    They detect the presence of a vehicle through electrical conductivity, and then using this input to signal the barrier, door, or gate to operate.  Parking structures for automobiles may use inductive loops to track traffic (occupancy) in and out or may be used by access gates or ticketing systems to detect vehicles.

    The sensitivity of loop detectors can also be adjusted to only open for large vehicles, or to exclude them, giving you control of what can come in to your property.



  • Technical Specification

    Loop Detector Specification

    Model ULD 913 (Single Loop) ULD 923 (Dual Loop)
    Detection Method Induction detection Induction detection
    Sensor Dimensions 76mm (high) x 40mm 76mm (high) x 40mm
    (wide) x 75mm (deep) (wide) x 75mm (deep)
    Supply Voltage 12 - 24V AC/DC 12 - 24V AC/DC
    Supply Voltage Tolerance ± 15% ± 15%
    Current Consumption 100 mA max 165 mA max
    Relay Rating 5A @ 230V A.C. 5A @ 230V A.C.
    Operating Temperature -40°C to +80°C, (-40°F to 176°F) -40°C to +80°C, (-40°F to 176°F)
    Sensitivity Four step adjustable Four step adjustable
    Maximum 0.02%ΔL/L Maximum 0.02%ΔL/L
    Minimum 0.5%ΔL/L Minimum 0.5%ΔL/L
    Sensitivity Boost Selectable on Med High, Selectable on Med High,
    Med Low & Low Settings Med Low & Low Settings
    Indications 2 LEDs 3 LEDs
    Green = Power Green = Power
    Red = Output Red x 2 = Output per channel
    Presence Time Selectable - Permanent or limited Selectable - Permanent or limited
    (1hr for 3%ΔL/L) (1hr for 3%ΔL/L)
    Pulse Output Duration 150 ms (250 ms factory option) 150 ms (250 ms factory option)
    Response Time Approx. 100ms Approx. 120ms
    Tuning Automatic Automatic
    Output Configuration   Selectable on PCB
    2 Output relays 2 Output relays
    Relay 1 - Presence (Fail Safe) Relay 1 - Presence/Pulse/AB
    Relay 2 - Pulse/Presence (Selectable) Relay 2 - Presence/Pulse/BA
    Inductive Range 20-1500 μH 20-1500 μH
    Loop Frequency Range Four step adjustable range 20 - 140kHz Four step adjustable range 20 - 140kHz
    Connector Single rear mount 11-pin submagnal Single rear mount 11-pin submagnal
    Ordering Details ULD 913 (Single Loop) ULD 923 (Dual Loop)
      Finder Base included Finder Base included
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  • FAQs

    • What is the Fire Rating for an Ellard Roller shutter?

      It is the roller shutter that is fire rated rather than the Ellard motor. Therefore you would have to refer back to whom you bought the roller shutter from

    • What industrial door motors do you sell?

      Here at Ellard ltd we specialise in supplying industrial door motors and supply a comprehensive range of motor types and models. This includes, direct drive, flange, sectional, garage door and tubular motors. Our selection is vast, so for a comprehensive list of our products and specifications you can visit our dedicated pages or get in touch with our expert team.

    • Do your traffic barriers have obstacle detection?

      Yes, our Nubia traffic barrier has built in intelligent controllers which offer obstacle detection and built in lights to make them easy to see in the dark or in bad weather.

    • What are the benefits of direct drive motors?

      Direct drive motors remove the need to use an elaborate system of cogs. This means that the full power of the motor goes straight into the pulling mechanism, making it an extremely efficient motor. Without the extra mechanisms, it also has a very low sound output comparatively to other methods.

    • Why should I use a fire motor as part of my fire safety plan?

      Fire motors are often connected to your fire detection system and activate if fire is detected on your premises. They quickly and efficiently close helping to contain the fire and keep your employees/customers safe from the dangerous area. Government legislation requires that all fire doors must have an automatic function and all Ellard fire motors comply with the latest rules and regulations. All motors can be set to a Smoke Curtain mode, and our new Fire Door Control Panel has a panic circuit function to guarantee a means of escape.This allows you to re-open the shutter 3/4 then immediately re-close when fire alarm is still active.

    • Can I link specific access controls to my gate automation system?

      Yes, our gate automation systems can be linked to keypads, switches, intercom systems and key switches, dependant on your specifications or security requirements. Take a look at the range of controls and accessories available for gate automation.

    • Can I add extra features to my sectional door drives?

      Yes, we ensure that your sectional doors have easy wiring to add safety and access accessories.

    • What are the main applications for high speed motors?

      High speed motors are used for a wide range of purposes and can increase the efficiency of companies when time is of importance. Beverage, food, car and chemical factories often use high speed motors both to increase productivity and provide a security barrier. They can also be interlocked to create a airlock function

    • What size strips do you supply your sliding door gear track?

      Our track sections are cold rolled and in standard lengths of 2,000, 2,500 and 3,000mm and can be used for both side or top fixing. If you would like to learn more about our sliding door gear then please get in touch with our team.

    • Which motors are most commonly used for shutters and garage doors?

      Tubular motors are the most common place motor for roller garage doors and shutters. They provide a durable, fast and quiet solution for both light and heavy applications. Tubular motors can be plugged into the mains through our easy fit panel to give you low voltage at the key switch or are backed up with battery power. Additionally, we provide garage door automation for sectional and balanced doors.

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