M18-4 Series

Overview

Heavy-duty barrel sensor protected by a 316 stainless steel housing that resists exposure to harsh chemicals and washdown conditions.

  • Complete family of sensors, all housed in the popular 18 mm threaded metal barrel
  • Chemically robust stainless steel sensors for washdown applications
  • Robust housing is sealed against fluid ingress and exposue to harsh chemicals
  • Powerful and bright visible red emitter beam for easy alignment and setup
  • Highly visible output and dual-function power and stability indicators
  • Advanced ASIC technology is resistant to fluorescent light and offers exceptional cross talk immunity
  • Robust 250° adjustment potentiometer on select models
  • Widest operating temperature range
  • (-40 to +70 °C) of comparable sensors

Product Specifications

Supply Voltage10 to 30 V dc for ambient temperature ≤ 55 °C

10 to 24 V dc for ambient temperature > 55 °C
Supply Protection CircuitryProtected against reverse polarity and transient voltages
Supply Current (Exclusive of Load Current)Diffuse: 16 mA

Opposed Mode Emitters: 17 mA

Opposed Mode Receivers: 8 mA

Retroreflective and Polarized Retroreflective: 16 mA
Output Protection CircuitryProtected against false pulse on power-up and continuous short circuit

of outputs. Short circuit protection at elevated temperature may

require a power cycle to reset.
Output Rating≤ 50 mA total current for ambient temperatures > 55 °C

≤ 100 mA total current through both outputs ≤ 55 °C

OFF-State Leakage Current: < 50 μA at 30 V dc

ON-State Saturation Voltage: < 1.5 V at 10 mA; < 3.0 V at 100 mA
Output ConfigurationComplementary PNP or NPN by model number
Output Response TimeResponse is independent of signal strength

Opposed mode: 1.5 milliseconds ON, 1.0 milliseconds OFF

Retro, Polarized Retro, and Diffuse: 1.5 milliseconds ON, 0.75

milliseconds OFF

Delay on Power-up: 100 milliseconds; outputs do not conduct during

this time
IndicatorsThree LEDs (1 green, 2 amber)

Green solid: indicates power applied and sensor ready

Green flashing: indicates marginal sensing signal

Amber solid: indicates Pin 4 (black wire) output conducting
Emitter LEDVisible red
RepeatabilityRepeatability is independent of signal strength

Opposed mode: 170 microseconds

Retro, Polarized Retro, and Diffuse modes: 100 microseconds
ConstructionHousing: 316L stainless steel

Front Window: PMMA

Indicator Windows: Clear polysulfone (PSU)

Indicator cover and gain pot driver: Black PSU

Cable: PVC jacket

Pigtail QD: 316L stainless steel and PVC jacket

QD connector and mounting nuts: 316L stainless steel
AdjustmentsDiffuse (DL, DS), Emitter (ES), Receiver (RS), Polarized Retroreflective

(LPC), Retroreflective (LV) models: Single turn sensitivity (gain)

adjustment potentiometer

Emitter Beam Inhibit (EJ) models: Tie black wire to 10 to 30 V dc for

beam inhibit

English

Data Sheets

Document Name Part Number File Size Download
1. M18-4 Stainless Steel 18 mm Barrel Sensors -- Datasheet 188320 Download

French

Data Sheets

Document Name Part Number File Size Download
1. M18-4 Stainless Steel 18 mm Barrel Sensors -- Datasheet
(French)
188320_FR Download

German

Data Sheets

Document Name Part Number File Size Download
1. M18-4 Stainless Steel 18 mm Barrel Sensors -- Datasheet
(German)
188320_DE Download

Italian

Data Sheets

Document Name Part Number File Size Download
1. M18-4 Stainless Steel 18 mm Barrel Sensors -- Datasheet
(Italian)
188320_IT Download

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