QL56 Series


Reliably detects luminescent plastics, coatings, lubricants, and marks on irregular or reflective surfaces. Housed in IP67-rated aluminum housing for use in rugged industrial environments.

  • High-power UV emission provides a consistent beam for improved sensitivity and reliable detection
  • Emitted spot is a line of light formed by 6 UV LEDs
  • Three push buttons to adjust the sensor’s switch point sensitivity and enable or disable a 20 ms off delay
  • Variable operating distance depending on model: 15, 30, or 40 mm
  • 5 position swivel QD connector to accommodate cramped mounting situations

Product Specifications

Sensing BeamLED UV, 375 nm; class 1
Sensing RangeQL56M6XD15BQ:10 to 20 mm (0.39 in. to 0.79 in.)
QL56M6XD30BQ:20 to 40 mm (0.79 in. to 1.57 in.)
QL56M6XD40BQ:30 to 50 mm (1.18 in. and 1.97 in.)
Supply Voltage and Current15 to 30 V dc (2 Vpp max. ripple); 50 mA max. @ 24V dc (excluding output current)
Supply Protection CircuitryProtected against reverse polarity
Output ConfigurationBipolar (1 NPN & 1 PNP), plus 0.75 to 5.5V dc analog output
Analog Output0.75 to 5.5V dc max
Analog Output impedance2.2 kΩ (short-circuit protection)
Output Rating100 mA max.
Output saturation voltage≤ 2V
Output Protection CircuitryOverload and short circuit protection
Output Response Time250 μs
Switching Frequency2 kHz
Delay0 ms (default) or 20 ms user selectable
Adjustments+ and – push buttons determine sensitivity

Set push button activates delay and keylock function
IndicatorsYellow OUTPUT LED:ON indicates output conducting
Green READY LED:ON indicates power on; Flashing indicates output overload
Orange DELAY LED:ON indicates 20 ms delay activated
Orange KEYLOCK LED:ON indicates push buttons are unlocked
5-segment bar graph:Indicates sensitivity
ConstructionAluminum housing, glass lens; mass 180 g max.
Environmental ratingIP67
Connections5-pin Euro-style (M12) integral QD
Operating ConditionsTemperature:–10º to +55º C (14º to 131º F)
Storage Temperature:–20º to +70º C (–4º to +158º F)
Minimum Spot Dimension2 x 8 mm @ 10 mm (QL56M6XD15BQ)

3 x 11 mm @ 24 mm (QL56M6XD30BQ)

4 x 15 mm @ 50 mm (QL56M6XD40BQ)
Ambient Light RejectionAccording to EN 60947-5-2
Shock resistance30 G; 6 shocks per axis; 11 ms duration (EN60068-2-27)
Vibration0.5 mm amplitude; 10 to 55 Hz frequency, per axis (EN60068-2-6)


Data Sheets

Document Name Part Number File Size Download
1. QL56 Series Luminescence Sensor 142396 Download

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