During technical comparisons, Q20PD-77757 appears alongside Banner Photoelectric Sensor, Banner Laser Distance Sensor and Idec Relays so engineers assess signal types, ingress protection, and ambient tolerances accurately.
Q20PD: 77757 - Banner 250 mm Diffuse Sensor
Q20PD 77757 Banner 250 mm Diffuse Sensor
| Brand | Banner |
| Product Type | Photo sensor |
| Model Number | Q20PD |
Banner 250 mm Diffuse Sensor Q20PD, 77757 Technical Specifications:
| Specification | Value |
|---|---|
| IP Rating | IP67 |
| Sensing Beam | Visible Red LED |
| NEMA / UL Type Rating | NEMA 4X |
| Sensing Mode (Detailed) | Diffuse |
| Housing Style | Rectangular |
| Primary Housing Material | Thermoplastic |
| Laser Classification | - |
| Input Output | Discrete |
| Connection Type | Cable Length 2m |
| Max Sensing Distance (mm) | 250 |
| Outputs | PNP |
| Power Supply | 10-30 V dc |
| Adjustments | Potentiometer |
| Max Op Temp (Β°C) | 60 |
| Min Op Temp (Β°C) | -20 |
| Number of Pins | 4 |
| Output response time (ms) | 0.8 |
| Small Visible Spot | - |
| Sensing Beam Wavelength | 655 |
| Delay at Power-up (ms) | 100 |
| Repeatability (Β΅s) | 155 |
| Max Op Relative Humidity | 95% @ 50Β°C |
| Lens Material | Acrylic |
| Barrel Diameter (mm) | - |
| Indicator | LEDs |
The Banner Q20PD: 77757 delivers efficient sensing performance with a maximum detection range of 250 mm using a Visible Red LED at 655 nm wavelength. Designed with a Diffuse sensing mode, it detects the light reflected directly off the objectβs surfaceβperfect for applications involving matte or irregularly shaped targets. The sensor features PNP discrete output and operates within a 10β30 V DC supply range. Its 2-meter pre-wired cable makes integration with control systems quick and seamless, while a potentiometer adjustment allows users to fine-tune sensitivity on-site. The response time of 0.8 ms ensures timely detection in fast-moving automation processes.
With a rugged rectangular thermoplastic housing, this sensor is rated IP67 and NEMA 4X, ensuring durability against dust, moisture, and industrial washdowns. Operating reliably from -20Β°C to +60Β°C with high humidity tolerance up to 95% @ 50Β°C, it supports long-term deployment in harsh conditions. The unit also includes LED indicators for power and output status, and an acrylic lens that maintains optical clarity throughout extended use. Its repeatability of 155 Β΅s enables highly consistent detection, which is essential in synchronized or precision-based systems. Trusted by automation engineers across industries, the Q20PD offers a reliable balance of simplicity, robustness, and performance for cost-effective implementation in industrial automation.
Applications of Q20PD: 77757 - Banner
The Q20PD is ideal for use in assembly lines, packaging equipment, pick-and-place machines, and bottling systems where objects need to be sensed without the use of reflectors. Its diffuse sensing capability is particularly suited for detecting items with varied surface colors or textures, such as cardboard boxes, colored plastics, or painted components. Maintenance engineers prefer this model for its straightforward setup, while design engineers value its compact size and fast reaction time, which support high-speed production lines. The Q20PD is especially useful when space constraints, vibration, or visibility issues make traditional retro-reflective sensors impractical. Its proven reliability and field-tested build make it a go-to choice for both OEMs and plant automation teams.
