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PR18S-BC10DNO is an M18 cylindrical plastic housing diffuse-reflective photoelectric sensor from LANBAO (Shanghai Lanbao Sensing) PR18S Series. It adopts a dedicated control IC for stable performance and integrates multiple circuit protections. Rated IP67 for dust and water resistance, it is a general-purpose object detection component widely used in industrial automation. It comes standard with a 2-meter PVC cable (suffixe: -E2).
- Model Code Decoding
The full standard model is PR18S-BC10DNO-E2. The definition of each code is as follows:
PR18S: Série de produits, featuring M18×1 thread, PBT plastic housing and diffuse-reflective detection principle
BC10: Detection specification
BC: Diffuse-reflective (direct reflection) detection mode
10: Rated sensing distance of 10cm (fixé, non-adjustable)
D: Power supply type, DC 10~30VDC
N: Output type, NPN
Ô: Output logic, Normalement ouvert (NON; output turns on when an object is detected)
-E2 (Default suffix): Cable outlet, standard 2m PVC cable; suffix -C stands for M12 4-pin connector type
- Principales spécifications techniques
| Catégorie | Spécification |
| Detection Mode | Diffuse reflection (direct reflection) |
| Light Source | 880nm Infrared LED |
| Rated Sensing Distance | 10cm (basé sur 90% reflectivity white card, non-adjustable) |
| Tension d'alimentation | 10 ~ 30 VCC |
| Type de sortie | 3-wire NPN Normally Open (NON) |
| Max Load Current | ≤300mA |
| Consommation actuelle | ≤25mA |
| Temps de réponse | ＜8.2ms |
| Précision de répétition | ≤5% Sr |
| Hysteresis Range | 3% ~ 20% Sr |
| Fonctions de protection | Reverse polarity protection, protection contre les courts-circuits, protection contre les surcharges, protection contre les surtensions |
| Status Indicator | Yellow LED (lights up when object is detected) |
| Matériau du boîtier | PBT Engineering Plastic |
| Dimension globale | M18×1 thread × 53.5mm (body length) |
| Classe de protection | IP67 (Compliant with IEC Standard) |
| Température de fonctionnement | -15℃ ~ +55℃ |
| Ambient Humidity | 35% ~ 95%RH (Sans condensation) |
| Certifications | CE, UL |
- Full Model List of DC Diffuse-Reflective Sensors in the Same Series
| Sensing Distance | NPN NO | NPN NC | PNP NO | PNP NC | NPN NO+NC | PNP NO+NC |
| 10cm (Non-adjustable) | PR18S-BC10DNO | PR18S-BC10DNC | PR18S-BC10DPO | PR18S-BC10DPC | PR18S-BC10DNR | PR18S-BC10DPR |
| 40cm (Réglable) | PR18S-BC40DNO | PR18S-BC40DNC | PR18S-BC40DPO | PR18S-BC40DPC | PR18S-BC40DNR | PR18S-BC40DPR |
Note: All models are equipped with -E2 (2m de câble) par défaut; replace the suffix with -C for connector version.
- Wiring Definition (3-wire Cable Version)
Brown wire: Power positive (+10~30VDC)
Blue wire: Power negative (0V / GND)
Black wire: Sortie de signal (NPN NO; output conducts when object is detected, connect to the negative side of load)
- Applications typiques
Workpiece presence detection and counting on automated production lines
Material detection for packaging and printing industries
Object recognition and sorting trigger on warehouse conveyor lines
Limit positioning and home position detection for equipment stations
Missing part and falling part detection for small components
- Troubleshooting Matrix for Common Faults
| Phénomène de défaut | Root Cause | Step-by-Step Solutions |
| Indicator off and no output after power-on | 1. Reverse power polarity | 1. Check brown and blue wires and rewire correctly |
| 2. Supply voltage out of 10~30VDC range | 2. Measure supply voltage with multimeter to ensure it is within rated range | |
| 3. Internal cable breakage | 3. Replace cable or conduct cross test with spare sensor | |
| No signal output even when object is detected | 1. Object beyond effective sensing distance | 1. Reduce the distance between sensor and object with proper margin |
| 2. Low reflectivity of measured object (pure black / light-absorbing material) | 2. Use high-reflective surface or select 40cm long-distance model | |
| 3. Wrong wiring of output circuit | 3. Verify complete connection of black output wire and load circuit | |
| False triggering & continuous output with no object | 1. Highly reflective objects in background | 1. Adjust mounting angle to avoid reflective background |
| 2. Strong ambient light directly irradiating the receiver lens | 2. Install light shield to block strong direct light | |
| 3. Severe electromagnetic interference | 3. Route sensor cables away from power cables and ensure proper grounding | |
| Fluctuating and unstable output signal | 1. Object stays at the detection boundary | 1. Fine-tune mounting distance to stay away from critical zone |
| 2. Dust or dirt covering the lens | 2. Clean the lens with a soft dry cloth |
- Modèles alternatifs
Upgraded model of the same brand: PR18-BC10DNO (Nickel-copper alloy metal housing with higher mechanical strength, paramètres électriques identiques)
Cross-brand equivalent alternatives: OMRON E3Z-D61, Schneider XUB5BNANL2
PR18S-BC10DNO is a standard M18 plastic housing diffuse-reflective photoelectric sensor manufactured by LANBAO. See physical specifications below:
- Detailed Mounting Dimensions
This sensor adopts threaded cylindrical mounting. Dimensions and mounting regulations are specified as follows:
| Article | Spécification |
| Main Thread | M18 × 1mm (Metric fine thread) |
| Effective Thread Length | 30mm |
| Sensor Body Length (Excluding cable/connector) | Environ. 53.5mm (cable version) |
| Sensing Face Diameter | Φ18mm |
| Accessoires standards | 2 pcs M18 lock nuts, 1 pc anti-loose washer |
| Recommended Mounting Hole | Φ18.5mm through hole |
| Minimum Spacing for Side-by-Side Installation | ≥40mm (to prevent optical crosstalk) |
Mounting Instructions
- Fix the sensor on cabinet panels, brackets and other mounting positions via two lock nuts; the extension length is adjustable.
- Align the sensing face towards the moving direction of measured objects. The tilt angle is recommended ≤15°, otherwise the effective sensing distance will be reduced.
- This is a non-flush mount sensor. Do not embed the sensing face into metal mounting surface; keep the sensing face fully exposed.
- Wiring Definition & Connection Instructions
9.1 Standard Cable Version (Suffix -E2, 2m PVC Cable, 3-fil)
| Wire Color | Fonction | Description |
| Brun | Power Positive (V+) | Connect to 10~30VDC positive terminal |
| Bleu | Power Negative (GND) | Connect to power 0V / negative terminal |
| Noir | Signal Output (DEHORS) | NPN Normally Open (NON) sortir |
9.2 Wiring Principle of NPN NO Output
This model is NPN sinking output:
When no object is detected: Output terminal is floating, internal transistor cuts off with no signal output.
When object is detected: Internal transistor turns on, black output wire connects to blue power negative terminal and outputs low level (0V).
Câblage typique (Connect to PLC Sinking Input)
Brown wire → 24V+ of switching power supply
Blue wire → 0V of switching power supply & PLC common terminal (COM)
Black wire → PLC digital input terminal
Wiring for Relay / Indicator Load
One end of load connects to 24V+, the other end connects to sensor black output wire.
Sensor blue wire connects to 24V-.
Single-channel load current shall not exceed 300mA. Pour charges inductives, connect a freewheeling diode in reverse parallel.
9.3 M12 Connector Version (Suffixe -C, 4-pin Male Connector)
Pin assignment (View from sensing face, numbered clockwise):
- Épingle 1: Brun (Pouvoir +)
- Épingle 3: Bleu (Pouvoir -)
- Épingle 4: Noir (Signal Output)
- Épingle 2: De rechange (Inutilisé)
- Montage & Précautions de câblage
- Protection de polarité: Do not reverse power polarity. The built-in reverse polarity protection prevents burnout, but the sensor will not work normally under reversed connection.
- Load Limit: Maximum output load current is 300mA. Do not drive high-power loads directly; use intermediate relays for transition.
- Exigences environnementales: Avoid direct sunlight or strong LED light on the sensing window, and keep away from mirror or polished metal reflective surfaces in the background.
- EMC Requirements: Separate sensor cables from power cables (onduleur, servo cables) with a distance of ≥20cm. Do not lay them in the same conduit.
