Turck
Turck BI3-M18-AZ3X/S903 1302100 inductive sensor M18 3mm 20-250VAC 10-300VDC
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
- TypeTest Equipment
- Item Count1 pack
- Selling UnitBox
- Parts3 Years
- Labor1 Year
- 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.
Highlights
- 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
Specifications
| Brand | TURCK |
|---|---|
| Model | BI3-M18-AZ3X/S903 1302100 |
| Type | Test Equipment |
| Item Count | 1 pack |
| Selling Unit | Box |
| Parts | 3 Years |
| Labor | 1 Year |
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.
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