BGS-CX61 Focused-Beam Background Suppression Photoelectric Sensor

Name: BGS-CX61 Focused-Beam Background Suppression Photoelectric Sensor
Brand: DAIDISIKE
SKU: bgs-cx61-focused-beam-background-suppression-photoelectric-sensor
Availability: InStock

2 mm focused-spot BGS sensor that switches strictly by distance, ignoring shiny or close backgrounds.

BGS-CX61 Focused-Beam Background Suppression Photoelectric Sensor - product photo

🔍 Click to enlarge · 1/19

Technical Specifications

Detection method	Diffuse-reflective, background suppression (BGS)
Output type	BGS-CX61N: NPN open-collector; BGS-CX61P: PNP open-collector
Logic selection	White wire unconnected = Light-ON; white wire connected to blue wire = Dark-ON
Spot size	2 mm
Supply voltage	DC 12-24V ±10%
Current consumption	Under 30 mA
Response time	Under 0.5 ms
Load voltage	DC 26.4V max
Load current	100 mA max
Leakage current	10 μA max
Protection rating	IP67 (IEC 60529)
Operating temperature	-25°C to +55°C
Storage temperature	-40°C to +70°C (non-condensing)
Operating humidity	35-85%RH
Storage humidity	35-95%RH
Housing material	PBT (polybutylene terephthalate); resin lens/display cover
Sensitivity adjustment	Potentiometer, up to 5 full turns
Cable	4-wire lead-out, 2 m length

Overview

BGS-CX61 is a diffuse-reflective, background-suppression (BGS) photoelectric sensor available in NPN (BGS-CX61N) or PNP (BGS-CX61P) open-collector output. It is built for machine builders and line integrators who need a small-footprint sensor that detects a target at a set distance while disregarding whatever sits behind it — conveyor rollers, machine frames, reflective panels, or a mix of dark and light parts on the same line.

Detection is cut off strictly by distance rather than by reflected light intensity alone, so once the sensing distance is set, bright conveyor surfaces, metal frames, or rollers positioned beyond that range are ignored by design. The projected spot is only 2 mm, response time is under 0.5 ms, and the sealed housing is rated IP67 (IEC 60529), suiting small-part detection on fast-moving or washdown-exposed production lines.

Features & Benefits

True Background Suppression (BGS)

A standard diffuse sensor can be tricked into false triggering by a shiny or light-colored background. BGS-CX61 defines the detection zone by distance, so anything beyond the set range — bright conveyor surfaces, metal frames, rollers — is ignored by design.

Consistent Switching Distance on Dark and Light Targets

The sensor's switching distance stays consistent regardless of target color, so a line handling both black and white (or dark and light) products does not need re-teaching or sensitivity re-adjustment when the product color changes.

Focused 2 mm Spot for Small or Tightly Spaced Targets

The projected spot is only 2 mm, which lets the sensor pinpoint small parts, narrow gaps, or closely spaced positions without the beam spilling onto adjacent objects.

Sub-Millisecond Response for Fast-Moving Lines

Response time is under 0.5 ms, suitable for high-speed part counting, sorting, or presence checks on fast conveyors.

IP67-Rated Sealed Housing

The housing meets IP67 (IEC 60529) protection, tolerating dust and temporary immersion, which suits food, beverage, or oily/wet industrial environments.

Wire-Selectable Light-ON / Dark-ON Logic

A white control wire selects the output logic on site: leave it unconnected for Light-ON, or connect it to the blue wire for Dark-ON, without needing a different part number.

PBT Housing with On-Site Sensitivity Adjustment

The housing is molded from PBT (polybutylene terephthalate) with a resin lens/display cover, and sensitivity is fine-tuned with a built-in potentiometer (up to 5 full turns) for on-site setup.

Applications

Flat or Thin Workpieces Close to the Conveyor Surface — Background suppression is built for scenarios where the target sits close to the background, a case where standard diffuse sensors struggle to separate target from adjacent background.

Presence Checks in Front of Reflective or Metal Backgrounds — Background brightness does not affect detection, which suits metal-fabrication or stamping-line environments with highly reflective surroundings.

Mixed Dark/Light Color Product Lines — The same sensing-distance setting works across dark and light targets in packaging or sorting lines without retuning for each product color.

Small-Part or Narrow-Gap Position Detection — The 2 mm focused spot pinpoints small parts or narrow gaps precisely, avoiding false detections from beam spill onto neighboring objects.

High-Speed Counting and Sorting — Sub-0.5 ms response supports part counting, sorting, and presence checks on fast-moving lines.

Wet, Dusty, or Oily Production Environments — IP67 protection supports long-term use on food, beverage, or oily/wet industrial lines.

Retrofit Upgrade From Mis-Triggering Diffuse Sensors — Where a standard diffuse sensor false-triggers because of a reflective or too-close background, the distance-cutoff principle of BGS-CX61 addresses that failure mode directly.

Models & Ordering Information

Output Type Variants

BGS-CX61NBGS-CX61P

N = NPN open-collector output; P = PNP open-collector output. Both support wire-selectable Light-ON/Dark-ON logic via the white control wire.

How to Select

Choose BGS-CX61N for NPN open-collector output to match a PLC/controller NPN input.
Choose BGS-CX61P for PNP open-collector output to match a PNP input.
Both models share the same load ratings: load voltage DC 26.4V max, load current 100 mA max, leakage current 10 μA max.
Logic mode is field-selectable without changing part numbers: leave the white wire unconnected for Light-ON, or connect it to the blue wire for Dark-ON.
For wet, dusty, or oily environments, the IP67 housing rating applies; operating temperature is -25°C to +55°C and storage temperature is -40°C to +70°C (non-condensing).
The sensor is a 4-wire lead-out type with a 2 m cable; sensitivity can be fine-tuned on site with the built-in potentiometer (up to 5 full turns).
Confirm the applicable sensing-distance range directly with us before finalizing a quotation, as this figure varies by installation and must be verified for your specific setup.

📘 Need the full method? NPN vs PNP Sensor Outputs Explained

When NOT to specify the BGS-CX61 — and what to use instead

Finalizing a quotation or system design that requires a confirmed sensing-distance figure

Why not: The applicable sensing-distance range for BGS-CX61 is explicitly not published in current data and must be confirmed directly with us before finalizing.

Use instead: the BGS-CX441/CX442 or BX series, which both publish explicit adjustable sensing-distance figures

Detection distance needs to reach into the meter range rather than a close focused spot

Why not: BGS-CX61 is built around a focused 2 mm spot for small/tight-target detection at close range, not multi-meter reach.

Use instead: the BX-H4000 long-range background-suppression sensor (adjustable 50-4000 mm, single-sided, no reflector)

The load must be switched directly (contactor, solenoid valve, alarm lamp) without a PLC or controller in between

Why not: BGS-CX61 is open-collector NPN/PNP output only - it has no built-in relay contact.

Use instead: the E3JK square photoelectric sensor's relay-output versions (3 A rated)

Ambient temperature will exceed +55 degC or drop below -25 degC in operation

Why not: Published operating temperature range is -25 degC to +55 degC.

Use instead: confirm an alternative rated for the actual ambient range before specifying

Personnel guarding or any safety-related presence detection

Why not: No safety rating or safety certification is published for BGS-CX61.

Use instead: a certified safety light curtain (e.g. DQC/DQA series) for personnel protection

Specifications we do not publish yet

We only publish a figure once we are confident it is true. The items below are still being validated through further testing and real-world customer feedback, so for now we would rather leave them open than guess. If one of them matters to your design, ask us for the latest validated status.

Sensing-distance range — still being validated; ask us for the confirmed figure
Minimum detectable object size
Hysteresis
MTBF
Light source type/wavelength (visible or infrared, nm)
Cable connector type (flying leads vs. connector)
Certification status (documents said to be available on request but not specified)

Frequently Asked Questions

What does "background suppression" (BGS) mean on the BGS-CX61?

It means the sensor's detection zone is cut off by distance rather than by reflected light intensity alone. Once the sensing distance is set, anything located beyond that distance — including the conveyor, machine frame, or other background objects — is not detected, even if it is highly reflective.

What is the spot size of the BGS-CX61?

The projected light spot is 2 mm, which allows the sensor to target small parts or narrow gaps precisely.

What output types are available?

Two part numbers: BGS-CX61N (NPN open-collector output) and BGS-CX61P (PNP open-collector output).

Can I switch between Light-ON and Dark-ON without buying a different sensor?

Yes. The white wire selects the logic on site — leave it unconnected for Light-ON operation, or connect it to the blue wire for Dark-ON operation.

What is the response time?

Under 0.5 ms, based on the manufacturer's datasheet.

What is the protection rating, and is it suitable for washdown or wet environments?

The housing is rated IP67 per IEC 60529, tolerating dust and temporary immersion, which suits food, beverage, or oily/wet industrial environments.

What is the operating voltage and current consumption?

DC 12-24V (±10%), with current consumption under 30 mA.

What is the sensor housing made of?

The housing is PBT (polybutylene terephthalate); the lens/display cover is a resin material.

How is sensitivity adjusted on site?

Sensitivity is adjusted using the sensor's built-in potentiometer, which can be turned up to 5 full turns for on-site fine-tuning.

Can you provide certification documents for the BGS-CX61?

Certification documents are available on request.

Works Well Together

On the same machine or line, BGS-CX61 is typically ordered together with: Proximity Sensors · Laser Switch Sensors · Relay & Timer Modules

Related Products in Photoelectric Sensors

Browse all Photoelectric Sensors →