It is sealed and stainless so it is very water resistant. It's not made to be submersed in water, though it could last for a time underwater. The sensor can take a light stream of water, but would likely fail under high pressure washdown over time.

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Taiss 2pcs LJ12A3-4-Z/AX Proximity Switch Inductive Proximity Sensor Detection Switch NPN NC DC 6V-36V 4mm Normally Close 6-36V

Taiss 2pcs LJ12A3-4-Z/AX Proximity Switch Inductive Proximity Sensor Detection Switch NPN NC DC 6V-36V 4mm Normally Close 6-36V

Q: dumb question but does this only detect proximity of metal or magnetic device or would it detect a human finger being used as no-touch switch?

Metal only. It does detect any metal however.

Q: How sensitive is this switch to aluminum? 4mm? 2mm? Thanks

Distance or thickness of material? I was able to trip it with a small aluminum tube but it had to make physical contact with the center of the switch.

Q: it is assumed sensor has voltage applied; is sensor closed then opens when tripped?

Depends on if it a normally open or normally closed sensor.

Product ID: 497180785

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Taiss 2pcs LJ12A3-4-Z/AX Proximity Switch Inductive Proximity Sensor Detection Switch NPN NC DC 6V-36V 4mm Normally Close 6-36V

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Description

Product Name : Inductive Proximity Switch;Model : LJ12A3-4-Z/AX;Theory : Inductive Sensor;Wire Type : 3 Wire Type (Brown, Blue, Black)
Switch Appearance Type : Cylinder Type, Metal Shell;Output Type : NPN NC;
Detecting Distance : 4mm(+/-10%);Supply Voltage : DC 6-36V Output Current : 300mA;Detect Object : Iron;Column Sensor Diameter : 10.4mm/0.4";Thread Diameter : 12mm/0.5"
Total Size : 66 x 21mm/ 2.6'' x 0.8'' (L*Max.D);Cable Length : 1.16m/35.7'';External Material : Plastic, Metal
Net Weight :100g;Color : Blue Tone, Black ;Package Content : 2 x Inductive Proximity Switch

Description: Case material: Metal / Copper Output Status: Normally Close Detection objects: Conductor Voltage: DC 6-36V Output Current: 300mA Polarity: NPN Dimension: M12x1x55mm Detection Distance: 4 mm Part number: LJ12A3-4-Z/AX Three wires wiring connection: Brown is connected to the positive power supply. Blue is connected to the negative power supply. Black is connected to the load. Package Included: 2X Inductive Proximity Sensor Detection Switch

Specifications

Manufacturer	Taiss
Part number	JJ-0021
Item Weight	59 g
Package Dimensions	10.9 x 7.49 x 1.8 cm; 59 g
Item model number	JJ-0021
Size	NPN NC
Colour	NPN NC
Material	Plastic Metal
Item Package Quantity	1
Batteries included?	No
Batteries Required?	No

Have a Question? See What Others Asked

dumb question but does this only detect proximity of metal or magnetic device or would it detect a human finger being used as no-touch switch?

Is it waterproof?

How sensitive is this switch to aluminum? 4mm? 2mm? Thanks

it is assumed sensor has voltage applied; is sensor closed then opens when tripped?

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