Name: SICK GTB2S-E1451 Photoelectric Proximity Sensor - INOSAKI
SKU: SICK-1064342
Price: 70.15 USD
Availability: InStock

Technical Overview

Miniature NPN dark-on photoelectric proximity sensor with background suppression, 2–120mm range, IP67 ABS housing, and a 3-turn potentiometer.

Key Features

Compact rectangular miniature housing (7.7 mm x 27.5 mm x 13.5 mm) for highly restricted spaces [2.3.2].
Reliable background suppression (BGS) prevents false triggers from reflective or shiny backgrounds.
High-visibility red PinPoint LED simplifies alignment with a distinct Ø 3.5 mm light spot at 50 mm.
Adjustable sensing range from 2 mm to 120 mm using a 3-turn potentiometer.
NPN, dark-switching output with a fast response time of < 0.6 ms and 800 Hz switching frequency.
Rugged IP67-rated ABS housing with PMMA optics, suitable for harsh operational temperatures from -25°C to +50°C.
Integrated circuit protection including reverse polarity protection, interference suppression, and short-circuit protection.

Technical Specification Matrix

Parameter	Value
Functional principle	Photoelectric proximity sensor
Functional principle detail	Background suppression
Dimensions (W x H x D)	7.7 mm x 27.5 mm x 13.5 mm
Sensing range max.	2 mm ... 120 mm
Sensing range	25 mm ... 90 mm
Type of light	Visible red light
Light source	PinPoint LED
Light spot size (distance)	Ø 3.5 mm (50 mm)
Wave length	640 nm
Adjustment	Potentiometer, 3 turns
Supply voltage UB	10 V DC ... 30 V DC
Ripple	< 5 Vpp
Current consumption	20 mA
Switching output	NPN
Switching mode	Dark switching
Output current Imax.	≤ 50 mA
Response time	< 0.6 ms
Switching frequency	800 Hz
Connection type	Cable, 3-wire, 2 m
Cable material	Plastic, PVC
Cable diameter	Ø 3 mm
Housing material	Plastic, ABS
Optics material	Plastic, PMMA
Enclosure rating	IP67
Ambient operating temperature	–25 °C ... +50 °C
Ambient temperature, storage	–40 °C ... +75 °C
MTTFD	3,378 years
Physical Weight (kg)	0.03
Dimensions L x W x H (cm)	1.35 x 0.77 x 2.75

Industrial Applications

1. High-Speed Electronic Component Presence Detection

In automated PCB assembly lines, tiny electronic surface-mount devices (SMDs) or IC chips must be detected on conveyor belts prior to pick-and-place operations [2.1.4]. The GTB2S-E1451's miniature form factor (7.7mm width) fits easily into tight machine spaces, while its small Ø 3.5 mm PinPoint LED spot enables precise targeting of small components.

Problem Solved

Traditional sensors fail because different component colors or shiny PCB background surfaces cause false triggers. The background suppression (BGS) of this sensor ignores background reflections from the PCB, ensuring only the target component is detected.

Background SuppressionPinPoint LEDNPN switchingElectronic AssemblyMiniature Housing

2. Compact Packaging Line Bottle Cap Detection

In compact cosmetic or pharmaceutical packaging machines, the sensor is used to verify the presence of dark or opaque caps on bottles. Since it is dark-switching, it outputs a signal when the light beam is interrupted, indicating a capped bottle is in position.

Problem Solved

Space on bottle filling starwheels is extremely limited, preventing the use of standard-sized sensors. The sub-centimeter width (7.7mm) and 2m integrated cable of this sensor allow mounting directly inside the narrow starwheel pocket. IP67 rating protects it against liquid splashes during cleaning.

IP67 Enclosure RatingDark SwitchingResponse Time < 0.6 msPharmaceutical PackagingSpace-Saving

3. Automatic Tray Sorting and Positioning

In automated warehousing or laboratory sample-sorting systems, plastic trays of varying reflectivity are sorted. The sensor detects the leading edge of trays moving at speeds up to 1.5 m/s, triggering sorting gates.

Problem Solved

Varying tray colors (from white to black) usually cause fluctuating detection ranges with standard diffuse sensors. The GTB2S-E1451's background suppression and 3-turn potentiometer ensure a stable detection range from 2mm to 120mm, maintaining high accuracy irrespective of target color or material reflectivity.

Sensing range 2 mm ... 120 mmPotentiometer 3 turnsSwitching frequency 800 HzMaterial Handling