Product Overview
Keyence LR-ZB240CB CMOS Laser Distance Sensor – Unused, New Old Stock
The Keyence LR-ZB240CB is a self-contained CMOS laser sensor engineered for stable distance-based detection across a wide range of industrial automation tasks. Its combination of background suppression, stainless-steel construction, and a visible 660 nm Class 1 laser makes it a versatile fit for part positioning, presence detection, and error-proofing in demanding environments.
The LR-Z series is known for balancing precision optics with rugged housings, allowing sensors to operate reliably near conveyors, fill lines, packaging machinery, or machining stations where vibration, washdown, and reflective backgrounds often challenge conventional photoelectric designs.
Product Condition
Unused, new old stock in the manufacturer’s packaging. Kept in original packaging with minor signs of handling from storage only.
Product Overview
This model offers a detectable range of approximately 25 to 240 mm using a red Class 1 laser projected to an optical spot of about 2.4 × 1.2 mm at its rated distance. A three-digit, seven-segment LED display provides real-time distance feedback for quick setup and on-machine monitoring. Background suppression via distance measurement allows the sensor to ignore distant reflective objects and focus on the intended target.
Electrically, the LR-ZB240CB operates on 10–30 VDC with low power consumption and provides bipolar open-collector outputs (NPN + PNP), enabling flexible integration with a wide variety of PLC inputs. Response speeds are selectable—1.5 ms, 10 ms, or 50 ms—supported by timer functions for ON/OFF delay or one-shot operation.
The stainless-steel SUS316L housing, PES display window, and PMMA lens with a scratch-resistant coating deliver high durability. The unit achieves IP68/IP69K and NEMA 4X/6P/13 ratings, along with ECOLAB approval, making it suitable for washdown, food processing, and chemical-exposure zones when installed within its specified limits.
Key Features
- CMOS laser sensor with 25–240 mm detection capability
- Red Class 1, 660 nm laser with defined spot geometry for stable readings
- M18 threaded housing with M12 4-pin connector
- Real-time distance readout via 3-digit LED display
- Bipolar NPN + PNP output rated to 100 mA max
- Selectable response times (1.5 ms, 10 ms, 50 ms) with built-in timers
- Stainless-steel SUS316L body, PES display, and PMMA lens
- IP68/IP69K and NEMA 4X/6P/13 environmental protection
- Resists ambient light up to 2000 lux (incandescent) or 4000 lux (sunlight)
- Vibration and shock tested for industrial deployment
Applications
- Positioning or presence detection for bottles, small assemblies, or trays
- PCB or component detection on electronics conveyors
- Error-proofing tasks requiring stable detection against reflective backgrounds
- Washdown environments in food, beverage, or pharmaceutical lines
- Short-range gauging or confirmation checks in automated machinery
- Retrofitting legacy sensors with a robust, distance-based alternative
Frequently Asked Questions
What is the sensor’s operating range?
The LR-ZB240CB detects targets approximately within 25 to 240 mm, with performance influenced by target reflectivity and mounting geometry.
Does it support both NPN and PNP outputs?
Yes. The sensor provides bipolar outputs (NPN + PNP), making it compatible with various PLC input cards.
How rugged is the housing?
The SUS316L stainless-steel body, PES display, and coated PMMA lens provide strong resistance to washdown, chemicals, shock, and vibration.
Is the unit suitable for high-glare environments?
Yes. The CMOS detection method, defined laser spot, and background suppression improve stability around shiny metals and reflective surfaces.
Where can I find exact pinouts and detection curves?
Those specifications are in Keyence’s official manual and datasheet and should be reviewed for engineering or commissioning work.
The LR-ZB240CB carries forward Keyence’s design philosophy: precision optics built into a rugged shell that settles comfortably into the rhythms of real production lines. Once mounted and dialed in, it becomes a quiet anchor point in any automation sequence.
