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NFM Inc, Santa Monica, CA, USA / Phone:(310) 564-6412 / FAX:(310) 802-3917 / www.nfminc.com
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Description of MI250 High Temperature Switches.

picture of MI250 and box

FEATURES

High Temperature Operation
The MI series of proximity switches are designed to operate in elevated temperatures up to 480° F / 250° C.

Protected Cable
The sensor cable is encased in a stainless steel mesh for protection.

Protective Housing
The MI series has a rugged housing capable of withstanding harsh environments, such as oil and welding spatter.

Switching Distance
These inductive switches are available with a switching distance of 0.6"/15mm, 0.8"/20mm and 1"/25mm.

Short-Circuit Protection
The output of MI series is short-circuit protected. The switches can be delivered with optional relay output.

Principle Of Operation
The MI series of switches have an inductive oscillator. Switching occurs when the inductive field collapses.
 
 
 

APPLICATIONS

- Burn-In Ovens
- Asphalt Machines
- Case Hardening Furnaces
- Lacquering Facilities for Automotive Industry
- Solder Level Detection
- Other applications requiring precise switching in high temperature environment.

 

TECHNICAL SPECIFICATIONS
Switching distance

15, 20 or 25 mm (0.6 , 0.8 or 1")
Detectable objects

Metals
Standard target

St37 Steel, minimal size 40 x 32 mm
Power supply

24V DC (+12...+30 V, max. 3V ripple)
max. 100mA
Operating
   temp. 		 Sensor Head

0 - 450° F  / 0 - 232° C
Electronics

0 - 158° F / 0 - 70° C
Output

24 V / 200mA if activated
Protection class

Better than NEMA 3 / IP64 ,
Short Circuit Protected
Cable length

3 , 7 , 10 or 20m
(10 , 23 , 32 or 65 ft)
(max. 7m (23 ft) for 25mm (1")switch)
Connector

Tuchel, type C164
Red LED

Illuminated if initiated

 
 

MOUNTING

Distance between sensor Heads : minimum 1.2" / 30mm
Sensor to Metal: minimum 0.6" / 15mm
 

Connector Pin #

Function

1

+12...+30 V DC Supply

2

Normally Open (n.o.)

3

0 V

4

Normally Closed (n.c.)

Cable can be disconnected for mounting purposes. Length of delivered cable must not be changed.

Sensor Head and Electronic Module are matched together, interchangeability is not guaranteed.

Cable insulating material is Teflon, sharp bending or permanent kinks are not good for long life operation.


 MI250 head measures

MI250 box measures

ORDERING INFO

Ordering Number: MI250 + Switching Distance (mm) + Cable Length (meters)

Example: MI250 with 15mm switching distance and a cable length of 20 meters -> MI250-15-20


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