We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Chrome-plated brass M18 threaded inductive sensor with cable

Turck

Turck BI3-M18-AZ3X/S903 1302100 inductive sensor M18 3mm 20-250VAC 10-300VDC

SKU CH-58AR-NSG97 MPN BI3-M18-AZ3X/S903

Detects metal at 3 mm range with AC 20–250 V or DC 10–300 V two-wire output in a flush-mount M18 chrome-plated brass barrel

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • 3 mm sensing range for reliable detection
  • 20-250 VAC and 10-300 VDC dual-voltage operation
  • Chrome-plated brass housing resists corrosion
  • Hysteresis below 0.1 mm ensures precise switching
  • M18 × 1 threaded barrel allows flush mounting

M18 inductive sensor for AC and DC circuits

The Turck BI3-M18-AZ3X/S903 is a flush-mount proximity switch with a threaded M18 × 1 brass barrel that is chrome-plated for durability. It operates on both 20…250 VAC and 10…300 VDC through a two-wire cable connection and provides a normally-open contact with a rated switching distance of 3 mm.

Suited for metal detection in industrial automation

This sensor suits engineers who need a single device qualified for wide AC and DC voltage ranges in a compact metal housing. It is not for applications requiring a normally-closed output, a larger sensing range, or a connectorised termination instead of a flying lead.

3 mm switching distance with sub-0.1 mm hysteresis

The unit reliably detects ferrous targets at its rated 3 mm distance while maintaining hysteresis always below 0.1 mm for repeatable actuation. Headroom diminishes when the target material is non-ferrous or when mounting clearances prevent flush installation.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $51.99
Cheaper than about 78% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameTURCK
Model nameBI3-M18-AZ3X/S903 1302100
Product typeTest Equipment
In the box
Number of items1 pack

Questions about this item

What voltage supply must already be available for the 20…250 VAC / 10…300 VDC sensor to operate?

The sensor runs on either AC 20…250 VAC or DC 10…300 VDC, so the installer must provide a supply within one of those two ranges.

Will the M18 × 1 threaded barrel fit the same mounting holes as an older M18 sensor?

Yes — the housing uses an M18 × 1 thread, so it matches standard M18 mounting cut-outs used by earlier sensors of the same thread size.

How can I confirm the 3 mm switching distance is working after wiring the NO contact?

Bring a metal target to 3 mm from the sensing face; the NO contact should close and the load should energise, showing the rated distance is met.

More in Electrical Trade Tools & Kits

Similar items