SICK 6020232 IM08-2N5NS-ZT1 NPN Inductive Proximity Sensor

Technical Overview

The SICK IM08-2N5NS-ZT1 is a standard-design M8 × 1 inductive proximity sensor for non-flush installation in metal. It has a 2.5 mm nominal sensing range and an NPN normally-open output in a DC three-wire circuit, with a switching frequency of 2,500 Hz. The device operates from 10–30 V DC and connects through an M8 three-pin connector. Its nickel-plated brass housing and plastic sensing face provide IP67 protection for operation from −25 to +70 °C. The output supports up to 200 mA continuous current, with a maximum 1.2 V voltage drop at maximum load and availability within 100 ms after power-up.

M8 normally-open inductive sensor with 2.5 mm nominal range, a DC three-wire circuit, 2,500 Hz switching and an M8 three-pin connector.

Key Features

M8 × 1 standard-design housing; non-flush in metal

2.5 mm nominal sensing range

NPN, normally open (NO); DC three-wire

2,500 Hz switching frequency

M8 three-pin connector

10–30 V DC; continuous current ≤200 mA

Voltage drop ≤1.2 V at maximum load; availability delay ≤100 ms

Nickel-plated brass housing and plastic sensing face

Short-circuit and power-up pulse protection

IP67; −25 to +70 °C operation

Technical Specification Matrix

Parameter	Value
Functional principle	Inductive proximity sensing
Housing design	Metric, standard design
Mounting thread	M8 × 1
Body diameter	Ø8 mm
Nominal sensing range Sn	2.5 mm
Installation	Non-flush in metal
Switching frequency	2,500 Hz
Switching output	NPN, normally open (NO)
Electrical wiring	DC three-wire
Power supply	10–30 V DC
Ripple	≤10%
Voltage drop	≤1.2 V at maximum Ia
Time before availability	≤100 ms
Hysteresis	2–10%
Reproducibility	≤2% of Sr at constant supply voltage and ambient temperature
Temperature drift	±10% of Sr
Continuous output current	≤200 mA
Protection	Short-circuit and power-up pulse protection
Connection	M8 three-pin connector
Pin assignment	1 BN=L+; 4 BK=NO output; 3 BU=M (CD-002)
Housing material	Nickel-plated brass
Sensing face	Plastic
IP rating	IP67; EN 60529
Operating temperature	−25 to +70 °C
Maximum tightening torque	4 Nm
Shock resistance	30 g, 11 ms
Vibration resistance	10–55 Hz, 1 mm
EMC	EN 60947-5-2
Housing length	50 mm
Thread length	31.3 mm
Indication	Display LED
Mounting nuts	Two metal fastening nuts, 13 mm across flats
Installation clearances	Manufacturer table references A/B/C/D/E/F: 8 / 16 / 8 / 7.5 / 4 / 20 mm
MTTFD	152 years
DCavg	0%

Parameter

Value

Functional principle

Inductive proximity sensing

Housing design

Metric, standard design

Mounting thread

M8 × 1

Body diameter

Ø8 mm

Nominal sensing range Sn

2.5 mm

Installation

Non-flush in metal

Switching frequency

2,500 Hz

Switching output

NPN, normally open (NO)

Electrical wiring

DC three-wire

Power supply

10–30 V DC

Ripple

≤10%

Voltage drop

≤1.2 V at maximum Ia

Time before availability

≤100 ms

Hysteresis

2–10%

Reproducibility

≤2% of Sr at constant supply voltage and ambient temperature

Temperature drift

±10% of Sr

Continuous output current

≤200 mA

Protection

Short-circuit and power-up pulse protection

Connection

M8 three-pin connector

Pin assignment

1 BN=L+; 4 BK=NO output; 3 BU=M (CD-002)

Housing material

Nickel-plated brass

Sensing face

Plastic

IP rating

IP67; EN 60529

Operating temperature

−25 to +70 °C

Maximum tightening torque

4 Nm

Shock resistance

30 g, 11 ms

Vibration resistance

10–55 Hz, 1 mm

EMC

EN 60947-5-2

Housing length

50 mm

Thread length

31.3 mm

Indication

Display LED

Mounting nuts

Two metal fastening nuts, 13 mm across flats

Installation clearances

Manufacturer table references A/B/C/D/E/F: 8 / 16 / 8 / 7.5 / 4 / 20 mm

MTTFD

152 years

DCavg

Industrial Applications

1. Checking a metal part seated in an assembly fixture

An assembly fixture can present a metal component at a repeatable gap in front of the non-flush-mounted sensing face. The NPN normally-open output supplies a component-present condition for external inspection logic after the fixture settles. Commissioning verifies the actual material, target geometry and placement tolerance against the 2.5 mm nominal sensing range, rather than treating nominal range as an assured installation distance.

Problem Solved

A metal-present reference helps external inspection logic identify an empty or mispresented fixture location before the next assembly operation proceeds at the station.

Fixture seating Non-flush mounting NPN normally open

2. Counting metal teeth for rotational-speed monitoring

A rotating mechanism can present separated metal teeth or flags past the sensor at a controlled gap. External counting logic derives rotational speed from the pulse frequency and the known number of targets per revolution. Tooth spacing, material and transit speed are assessed against the 2.5 mm nominal range and 2,500 Hz switching specification during commissioning.

Problem Solved

Repeated metal-target transitions give an external counter a rotation-rate reference, helping the machine monitor shaft motion using the known number of teeth or flags.

Tooth passage External speed calculation 2,500 Hz

3. Timing an actuator’s arrival at the end of a stroke

An actuator can carry a metal flag that enters the sensor’s range when the mechanism reaches its process end position. External timing logic starts from the motion command and stops at the NPN arrival transition, comparing elapsed travel time with configured limits. Setup checks flag material, gap and repeatability, and begins timing only after the sensor’s documented power-up availability interval.

Problem Solved

A discrete arrival event lets external timing logic compare stroke duration with the expected process interval, helping identify delayed motion at the monitored end position.

Stroke timing Metal arrival flag External timer