Model LMA-1250

Loop Detector


The front panel 7-segment LED DEFLECTOMETER® provides visual feedback and assistance for setting the correct sensitivity, reading the frequency of the loop, reporting Loop Faults, and indicating Delay & Extension Timing functions.

With a typical size vehicle over the roadway loop, the DEFLECTOMETER® functions as a Sensitivity Meter. The optimum sensitivity setting should provide a reading of “5”. You can adjust the DEFLECTOMETER® reading by using the front panel UP or DOWN sensitivity buttons. Automatic quantitative feedback of the loop system operation ensures that the detector is set to the most optimum sensitivity level to detect ALL vehicles, including motorcycles and high-bed vehicles.

Following power-up or reset, the DEFLECTOMETER® will indicate a 2 or 3 digit number (quickly flashes) that indicates the loop frequency of the loop & loop network. Keeping your loops separated by at least 5 KHz avoids crosstalk problems and future service calls.

10 levels of sensitivity (0 to 9) can be easily set using the UP or DOWN push buttons.

Operates on 120VAC and 240VAC.

The Loop Fault Monitor continually checks the integrity of the loops and will report and store three types of loop faults; Open Loops, Shorted Loops, and 25% sudden changes in inductance.

The Loop Fault Memory uses internal Non-Volatile memory to store and display the current and previous loop faults utilizing the front panel “Loop Fault” LED and DEFLECTOMETER®. A power loss or reset will not delete this memory. A MUST FOR TROUBLESHOOTING!

The detector will not drop a Call state if power is lost for a minimum of 4 seconds or less.

A 2-second CALL “Delay” time and 2, 5, or 10-second CALL “Extension” time can be provided.

LMA-1250 Literature

LMA-1250 Manual


Model B-1

Digital Loop Detector


Sensitivity boost - user selectable by an internal dip switch

8 sensitivity levels - dip switch selectable

Self-tuning and complete environmental tracking

Loop failure indicator - Indicates current loop failures or loop failures that have occurred

Loop failure memory - Stores last record of the last loop failure

10-pin MS connector

Operating temperature range of -30°F to 180°F

Two outputs: Output A is presence; Output B is user selectable by a dip switch for presence, pulse on entry or pulse on exit

Fail Safe Operation

Output can be delayed for two seconds

Input voltage: 120 VAC


B-1 MANUAL                             






Model Ultra 2

Vehicle Loop Detector

Sensitivity selection is simplified by the ULTRAMETER™, which displays the appropriate sensitivity setting to detect the vehicle positioned on the loop.

Ten sensitivity settings enable finer adjustment of the detection level. And the four frequency settings provide greater flexibility in preventing crosstalk in multi-loop applications.


ULTRAMETER displays optimum sensitivity setting / diagnostic aid

Frequency count / reset switch

10 sensitivity settings

Loop diagnostics

4 operating frequencies

Lightning and surge protection

Frequency counter

Fail safe operation

Input Voltage: 12-30 VDC and 24 VAC, 18ma max.

Dimensions: 3"L X 0.9"W X 2.75"H

Ultra 2 Literature



Model PFL-48

Preformed Loop

The PFL preformed vehicle detection loop is constructed of stranded wire
conductors with XLP thermoplastic elastomer insulation jacketing. The outer shell
is flexible nonmetallic 0.26” tubing. The vehicle detection loop includes electronic
lightning protection. The lead-in wire is twisted, shielded and 50 ft. long.


Rugged and flexible TPE tubing with overall diameter of .26 inches suitable for saw-cut, tar and concrete installation.

Electronic lightning protection.

Comes with 50 ft. of twisted and jacketed lead-in wire.

Loops can be shipped by UPS.

Operating temperature: -60º to +260ºF.

Overall diameter of loop wire: 4' X 8' standard (PFL-48), other sizes available.

PFL-48 Literature