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Haldzemo SN04 Inductive Proximity Sensor
Proximity switch definition:
An inductive proximity switch consists of high frequency oscillation, detection, amplification, triggering and output circuits. The oscillator generates an alternating magnetic field on the detecting surface. When there is a metal object close to its detecting surface, the eddy current generated in the metal absorbs the energy of the oscillator, which makes it weaken to stop oscillating. The oscillator oscillation and stop vibration of these two states is converted into an electrical signal through the detection, amplification and trigger output circuit.
Difference between normally open (NO) and normally closed (NC):
Normally open (NO) is the usual state of the signal output line is disconnected state, no signal output, when sensed to the object is closed, the output signal.
Normally closed (NC) is the usual state of the signal output line for the closed state, continuous signal output, when the sense of the object is disconnected, close the signal.
LED working indicator:
signal indicator, when sensing metal objects the light is on for normally open, the light is off for normally closed.
Square proximity switch
- Model: SN04
- Detected object: Metal/Iron
- Detection distance: 4mm
- Working voltage: within DC 5-30V
- Wire type: 3 wire (Brown, Black, Blue)
- Shell Material: ABS
- Output current: 300mA
- Response time: 2mS
Application:
The function of proximity switches (also known as non-contact travel switches) is to act when approaching metal, and are widely used in machine tools, metallurgy, chemical industry, light textile and printing industries, in the automatic control system can be used as limit, counting, positioning control and automatic protection link, etc..
SN04 Proximity Switch
Shape: Square
Size: 18*18*36mm
Weight: 50g
Color: Blue
Wire length: 1.2m
SN Bracket
Size: 32*18*8.5mm
Weight: 15g
Color: Silvery
With 2pcs M3 screws
Wiring Method
Brown connect to Positive
Blue connect to Negative
Black connect to Load (signal output)
NPN NO
Mode: SN04-N
Output Type: NPN NO
PNP NO
Mode: SN04-P
Output Type: PNP NO
NPN NC
Mode: SN04-N2
Output Type: NPN NC
PNP NC
Mode: SN04-P2
Output Type: PNP NC
Robert T.
Reviewed in the United States on September 2, 2024
Well made
stephen Lynch
Reviewed in the United States on August 25, 2024
I use copious amounts of these inductive limit switches for CNC, 3d Printer, Automation devices, conveyor endstops, and height sensors.Inductive is so much nicer than mechanical switches, as it only cares how far it is from the metal reference plate, and does not care about dust, chips, or other obstructions.They are water resistant, they're virtually indestructible, and they're super accurate!I love them, and I know you will too!When ordering, Make sure you know whether you need NPN, or PNP style.NPN - Switches the negative side of the circuit.PNP - Switches the positive side.If you didn't design the circuit yourself, you'll need to know what the device you're interfacing this with is expecting. trying to use an NPN with a PNP device will result in no response, and if you don't test it, you could cause a seriously expensive machine crash.So just make sure you know the difference!
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