Description
The Keyence GT2-PA12 Contact Digital Sensor Head is a stylus-type, air-cylinder, general-purpose measurement sensor designed for precise dimensional and displacement detection. Featuring a 12 mm measuring range with 0.5 µm resolution, it provides high-accuracy, high-speed measurement in production and inspection environments. The unit’s robust IP67 construction ensures dependable performance even in harsh industrial conditions.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Keyence |
| Category |
Sensors & Switches |
| Part Number |
GT2-PA12 |
| Subcategory |
Photoelectric |
| Type |
Contact Digital Sensor Head, Stylus Type, Air Cylinder Type |
| Detection System |
Scale Shot System II (absolute type, no tracking error) |
| Measuring Range |
12 mm (0.47") |
| Resolution |
0.5 µm (0.02 mil) |
| Indicated Accuracy |
±2 µm (0.08 mil) |
| Measuring Force (Downward) |
1.2 N |
| Measuring Force (Side) |
1.15 N |
| Measuring Force (Upward) |
1.1 N |
| Sampling Cycle |
4 ms |
| Fluid Used |
Clean dry air |
| Indicator Light |
2-color LED (red/green) |
| Enclosure Rating |
IP67 (IEC) |
| Pressure Resistance |
0.5 MPa |
| Applied Pressure Range |
0.24–0.26 MPa |
| Operating Temperature |
0°C to +55°C (32°F to 131°F) |
| Operating Humidity |
35–85% RH (no condensation) |
| Vibration Resistance |
10–55 Hz, double amplitude 1.5 mm (2 h in each axis) |
| Shock Resistance |
1,000 m/s² (IEC60068-2-27) |
| Housing Material |
SUS303 stainless steel |
| Spindle Material |
SUS430 with fluorine coating |
| Contact Material |
TYPE304, 440C stainless steel |
| Sensor Cable |
Optional, connect to relay connector |
| Weight |
Approx. 0.20 lbs (35 g, excluding cable) |
Information About GT2-PA12
The GT2-PA12 is part of Keyence’s GT2 Series of digital contact sensors utilizing the Scale Shot System II, which eliminates tracking errors and ensures absolute measurement accuracy. It offers a 4 ms sampling cycle for rapid and stable data capture in automated inspection systems. Built from high-strength stainless steel with a fluorine-coated spindle, the sensor is resistant to mechanical wear and contamination. Its air-cylinder actuation enables consistent measuring force, ideal for precision gauging in machining, assembly, and quality assurance applications.
Key Features:
- High Precision: 0.5 µm resolution with ±2 µm indicated accuracy for exact dimensional measurement.
- 12 mm Measuring Range: Supports a wide measurement span for diverse inspection tasks.
- Fast Sampling: 4 ms response time enables high-speed, real-time detection.
- Durable Construction: IP67-rated stainless steel housing resists oil, dust, and water.
- Stable Air-Cylinder Design: Ensures uniform measuring force and reduced mechanical impact.
- Advanced Detection System: Scale Shot System II provides absolute measurement without tracking errors.
- Multi-Directional Mounting: Compatible with downward, side, or upward installation orientations.
- LED Indicator: Two-color (red/green) operation light for easy visual status monitoring.
- Environmental Robustness: Resistant to vibration (10–55 Hz) and shock up to 1,000 m/s².
- Clean Operation: Uses dry air to maintain sensor cleanliness and long-term stability.
The GT2-PA12 delivers the precision and reliability required for high-accuracy displacement and dimensional control in demanding industrial environments.
