Vehicle Loop Detector with Detachable 7-Pin Terminal Block

  • Easy to install and set up with the ULTRAMETER™ sensitivity display
  • Fail safe in the event of a loop failure
  • Fail secure in the event of a power loss
  • Compact design
  • Cost effective
  • Energy efficient

Overview of the ULTRA-II Vehicle Loop Detector

The ULTRA II vehicle loop detector is a compact, energy-efficient design with a user-friendly, detachable 7-pin terminal block that simplifies set-up.

This vehicle loop detector provides a relay output indicating vehicle presence or pulse on entry. The ULT-II also has an option for automatic sensitivity boost (ASB) which causes the sensitivity to increase following initial detection. This feature is useful to prevent dropout when detecting high-bed vehicles.

The ULT-II is easy to install and operate. Sensitivity selection is simplified by the ULTRAMETER™ display. Ten sensitivity settings allow for finer adjustment of the detection level, and four frequency selections help to prevent crosstalk in multi-loop applications.

Features of Our ULTRA II

  • ULTRAMETER™ displays optimum sensitivity setting / diagnostic aid
  • Fail safe in the event of a loop failure
  • Fail secure in the event of a power loss
  • Frequency count/reset switch
  • 10 sensitivity settings
  • Loop diagnostics
  • 4 operating frequencies
  • Lightning and surge protection
  • Frequency counter
  • Fail safe operation
  • CE compliant
Power Supply 12-24 VDC/AC
Current Draw 18 mA max.
Dimensions L=3.0in (76 mm) W=0.9in (22 mm) H=2.75in (70 mm)
Weight 0.15 lbs.(69g)
Loop Inductance 20…2000µH (Q factor >5)
Environmental Tracking Automatic Compensation
Operating Environment -40° C to 82° C (-40°F to 180° F) 0 to 95% relative humidity
Housing Material ABS
Connection 7 position screw terminal
Loop Compensation Isolation transformer allows operation with poor quality loops
Loop Frequency 4 settings (low, med-low, med-hi, high)
Surge Protection Loop circuitry protected by surge suppressors
ULTRAMETER Display Indicates optimum sensitivity level
Ouput Relay 1A @24 VDC Common, Normally Open, Normally Closed
Power/Loop Fault Indicator Green LED
Detect/Frequency Count Indicator Red LED
Frequency Count To aid in detector set up and prevention of crosstalk
Pulse/Presence Allows the relay output to send either a pulse output or have constant presence
Sensitivity 10 levels, 0-9
ASB (Automatic Sensitivity Boost) Increases sensitivity after initial detection to prevent dropout due to high bed vehicles


Terminal block
7 position

Preformed loop
2×6, 4×6, 4×8, 4×10, 6×10 or 8×12 ft with 50 ft lead

Test loop
1.25 x 1.25 x 0.75 inches

Spec Sheet

Loop Information

Loop Sizes
Loop Installation
Preformed Loop Spec Sheet
Preformed Loop Manual
Test Loop Instructions



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