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  • Box Detector CH4 - TD452L

TD452L (CH4 Box Detector)

$854.08 excl. tax
Product Part Number:
850.00 Grams
Calculated at checkout

Please contact us if you wish to purchase more than 9 of a particular item – one of our sales team will contact you for our special 10+ pricing.

Product Description

4-Channel Boxed Traffic Detector

The TD450 series of 4 channel microprocessor based boxed traffic detectors are packaged according to industry standards and are ideal for use in traffic control and toll equipment vehicle detection applications.

The TD250 whilst providing separate vehicle presence outputs may also be configured to operate in various modes such as Direction, Speed and Headway, as well as delay/extend mode.  An output can be provided when pre-set speed or headway threshold has been exceeded and can be use to control third party devices.  The LS version has a serial link for communication to a host device


  • Direction Logic (AB logic)
  • Speed Logic (Optional: unidirectional)
  • Headway Logic
  • Queue detection
  • Traffic counting
  • Toll equipment

Features of the TD450L in Particular

  • Direction Logic
  • Speed Logic – output based on a preset speed
  • Headway Logic – output based on a time less than the preset

Technical Data

Download Specification:
Self-Tuning Range:
15 - 2000μH
Four step adjustable on faceplate
  • High – 0.02% ΔL/L
  • Med-High – 0.05% ΔL/L
  • Med-Low – 0.1% ΔL/L
  • Low – 0.5% ΔL/L
Four step selectable on PCB:
  • High
  • Medium-High
  • Medium-Low
  • Low
Frequency dependent on loop per channel
Output Configuration:

Presence Time:
Four step adjustable on faceplate:
  • 1 sec
  • 4 mins
  • 40 mins
  • Infinity – no fixed time-out

Delay Time:

1 x Run indicator (Red)
1 x Channel status per channel
  • On = Detect
  • Flashing = Fault
  • Off = Undetect

Loop isolation transformers, zener diode clamping on loop inputs and gas discharge tube protection.
Power Requirements:
230V AC ±10% (48 to 62Hz)

Detect outputs:
Sealed relays rated at 1A @ 220V AC
Single change-over contact per channel

Operating Temp Range:
-40 °C to + 70 °C (Circuit conformal coated)
ABS blend
131mm (deep) x 113mm (high) x 57mm (wide)
Mounting Position:
2 x 11-pin submagnal type (86CP11)
1 x 3-pin VDE plug for AC mains versions
Pulse Output:
150mS OR 500mS
Static Response Times:
Turn on 30mS ± 5mS
Turn off 40mS

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