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PNP, NPN, 2-Wire and NAMUR Inductive Sensors

Switch & Sensor Specifications
Moniteur VPTs are available with a wide variety of industry proven inductive sensors for today's advanced process PLCs. Whether your process control system requires PNP, NPN, or NAMUR Intrinsically Safe rated sensors, Moniteur can supply the preferred position transmitter. Standard sensors available are shown in the table below:
Sensor Types Available

Sensor

Code

Type

Rating

FM Approval

P&F NJ2-V3-N

8

2 Wire NAMUR

5-25 VDC

Intrinsically Safe

P&F NBB3-V3-Z4

K

2 Wire DC, Normally Open

4-100 mA; 5-60 VDC

Non Incendive

P&F NBB2-V3-US

Q

2 Wire AC/DC

5-200 mA; 10-140 VAC/VDC

Non Incendive

P&F NBB2-V3-E0

M

3 Wire NPN DC, Sinking

100 mA max; 10-30 VDC

Non Incendive

P&F NBB2-V3-E2

N

3 Wire PNP DC, Sourcing

100 mA max; 10-30 VDC

Non Incendive

About Inductive Sensors
Inductive sensors are "solid state" (without moving parts) and are the most reliable of sensing methods, with a MTBF over 20 million cycles. Inductive Sensors have three parts of operation - the oscillator, triggering circuit and switching amplifier. The oscillator generates a high-frequency electromagnetic field in the sensor's target area. When a ferrous metal target enters the electromagnetic field (target area), eddy currents created in the target by the oscillator increase the load on the oscillator. At a specific load, the trigger circuit senses the reduction in oscillation and signals the switching amplifier to change the signal. Inductive Sensors consume electric power to operate, and must have approval to be used in hazardous areas (see table).
NAMUR inductive sensors operate without the amplifier circuitry in the sensor, allowing use in all hazardous areas. The required signal amplifier must be installed externally in the safe area.
Hazardous areas rated Division 2. The P & F sensors listed are FM approved for general purpose or hazardous areas rated Division 2, according to the NEC.
Intrinsically Safe. NAMUR Inductive Sensors are rated Intrinsically Safe and must be used with an approved current and voltage limiting barrier.
Moniteur Devices, Inc. 36 Commerce Road, Cedar Grove, NJ 07009 T 973.857.1600 F 973.857.7289