Could you please provide instructions about wiring and usage?

There is an attached wiring diagram on the switch connecting wire.This product is widely used in outdoors gates, garage doors, Weatherproof (IP66) construction for indoor/outdoor usage etc. Supply Voltage:6-36V DC;Type : NPN（normally open ）;Wire Type : DC 3 Wire,Proximity-sensing / Opposite Type Sensory Distance : 0-20m；Sending Light : Infrared Rays;Current : 300mA;Thread diameter: 12mm/0.47"

will these work as single unit and trigger if object is sensed by the beam?

Yes. It will send a signal every time the beam is broken thru a 3rd wire. You do have to have a counter or something attached to accept the signal

what is the switching speed of the npn receiver?

The actual switching time is about 2-3 microseconds on the one I've bought, but the minimum "break" time it responds to reliably seems to be at about 10 milliseconds with a 10K load resistor. you could probably increase the sensitivity with a larger load resistor but I haven't tried.

This product is not infrared!. it is red laser dot. do you have one that is really infrared (>800nm)?

I don't have one, sorry. Issue an open ended purchase order and I will develop one just for you. Thanks.

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Taiss/1 Pair photoelectric Switch 0-20M Through-Beam Reflection Optical Photoelectric Beam Sensor NPN NO photoelectric Sensor Switch 6-36V Proximity Switch with Infrared Ray Beam E3F-20DNL-Z-12MM

Taiss/1 Pair photoelectric Switch 0-20M Through-Beam Reflection Optical Photoelectric Beam Sensor NPN NO photoelectric Sensor Switch 6-36V Proximity Switch with Infrared Ray Beam E3F-20DNL-Z-12MM

Product ID: 162777862

📏0-20m sensing range

🔋6-36V DC wide voltage

🌧️IP66 weatherproof rating

AED 159

Duties & taxes included

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Description

🚪 Secure your space with precision and weatherproof confidence!

PLUG AND PLAY INSTALLATION - Includes mounting brackets and 120cm cable for quick, hassle-free setup.
BUILT TO BRAVE THE ELEMENTS - IP66-rated weatherproof design ensures seamless outdoor and indoor performance.
FLEXIBLE POWER COMPATIBILITY - Operates smoothly across a broad 6-36V DC range to fit diverse setups.
PRECISION DETECTION AT DISTANCE - Reliable 0-20 meter infrared beam sensing for flawless security and automation.
VERSATILE INDUSTRIAL SECURITY USE - Perfect for gates, garage doors, manufacturing lines, and entry detection.

The Taiss E3F-20DNL photoelectric switch offers a robust 0-20 meter infrared sensing range with NPN normally open output, powered by a versatile 6-36V DC supply. Its IP66 weatherproof rating guarantees reliable operation in both indoor and outdoor environments, making it ideal for security systems, industrial automation, and access control. The package includes a pair of sensors with mounting brackets and a 120cm cable for easy installation.

Specifications

ASIN	B07VPSSLBR
Best Sellers Rank	#68,789 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #24 in Photoelectric Sensors
Date First Available	July 25, 2019
Item Weight	5.6 ounces
Item model number	E3F-20DNL
Manufacturer	Taiss
Package Dimensions	5.83 x 3.86 x 1.34 inches

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