GT2-A12KL Keyence Digital Contact Sensor Head
The Keyence GT2-A12KL is an air push type sensor head from the GT2 series. It uses the Scale Shot System for absolute detection. This means no tracking error. The stroke is 12 mm. Resolution is 0.1 µm. It is built for low stress and high precision measurement.
This sensor head connects to a GT2 series amplifier via an M8 connector. It has no built in ports or protocols. All signal processing happens in the amplifier. The head uses dry air for push operation. Pressure range is 0.25 to 0.50 MPa. Pressure resistance is 1 MPa. The operation indicator is a two colour LED (red and green).
Technical Specifications
| Brand | Keyence |
| Model | GT2-A12KL |
| Series | GT2 series |
| Module Type | Digital contact sensor head, air push type |
| Detection System | Scale Shot System, absolute (no tracking error) |
| Measuring Range | 12 mm |
| Resolution | 0.1 µm |
| Indicated Accuracy | 1 µm (p-p) |
| Measuring Force (downward) | 0.4 N |
| Measuring Force (side) | 0.3 N |
| Measuring Force (upward) | 0.2 N |
| Sampling Cycle | 1 ms |
| Frequency Response | Not available (mechanical response not specified) |
| Sensitivity | 0.1 µm resolution (minimum detectable change) |
| Linearity | 1 µm (p-p) indicated accuracy |
| Temperature Range (Operating) | 0 to +55 °C (no freezing) |
| Humidity Range | 35 to 85 % RH (no condensation) |
| Environmental Resistance | Protection rating not available |
| Noise Immunity | Absolute detection system prevents tracking error |
| Fluid Used | Dry air |
| Pressure Resistance | 1 MPa |
| Applied Pressure Range | 0.25 to 0.50 MPa |
| Operation Indicator | 2-colour LED (red, green) |
| Built-in Ports | None |
| Protocols | None |
| Communication Expansion | None |
| Supply Voltage | Not available (powered by GT2 series amplifier) |
| Power Consumption | Not available |
| Output Type | Not available (sensor head; connects via M8 connector) |
| Weight | Approx. 145 g (not including cable) |
| Dimensions (H×W×D) | Not available |
| Lifecycle Status | Active (official Keyence production status confirmed, last verified 2026-09) |
| Certifications | Contact us for current certification details |
Installation Guide
- Mount the GT2-A12KL in downward, side, or upward orientation. Measuring force changes with orientation.
- Use dry air only. Keep pressure between 0.25 and 0.50 MPa.
- Connect the M8 connector to a compatible GT2 series amplifier.
- Do not exceed 1 MPa pressure resistance.
- Operate between 0 and +55 °C. Avoid freezing.
- Keep humidity between 35 and 85 % RH. Avoid condensation.
Debugging and Maintenance
- The 2-colour LED shows red or green status. Use it for quick checks.
- No tracking error means less rework after power cycles.
- Absolute system keeps position data without homing.
- Clean the sensor head with dry air only. Do not use liquids.
- Check air pressure regularly. Stay within 0.25 to 0.50 MPa.
- Inspect the M8 connector for damage or loose contacts.
Compatibility Notes
- Works only with GT2 series amplifiers.
- No built-in communication ports. All data goes through the amplifier.
- M8 connector links the head to the amplifier.
- No protocol support inside the head.
- Not compatible with non-GT2 amplifier families.
Typical Applications
- High precision dimensional checking in automated lines.
- Low stress measurement of fragile or soft parts.
- In process gauging for small stroke movements.
- Position verification in fixtures and test benches.
- Quality control for tight tolerance assemblies.
Diagnostic Capabilities
- Absolute detection removes tracking error after power loss.
- LED indicator gives immediate pass or fail status.
- 1 ms sampling cycle catches fast changes.
- 0.1 µm resolution reveals small deviations.
- 1 µm (p-p) accuracy supports repeatable decisions.
Why Buy From Oiltech Controls?
- Over 15 years in industrial automation spare parts.
- Global shipping with FedEx, UPS, and DHL.
- Tested surplus and refurbished options available.
- 12 month warranty on every eligible unit.
- Technical verification before shipment.
- Support for obsolete control systems.
Contact us for inquiries: info@oiltechcontrols.com or +86 158 8020 0923 (WhatsApp). We respond fast.
Packaging and Warranty
- 1x Keyence GT2-A12KL sensor head
- M8 connector pre installed (cable not included)
- Quick start sheet (if supplied by Keyence)
- 12 month warranty from Oiltech Controls Limited
- Shipping via FedEx, UPS, or DHL
FAQ
Q: Does the GT2-A12KL work without an amplifier?
No. It needs a GT2 series amplifier for power and signal.
Q: What air pressure should I use?
Use dry air between 0.25 and 0.50 MPa.
Q: Can I mount it sideways?
Yes. Side mounting gives 0.3 N measuring force.
Q: Is it repairable?
We test before shipment. We also support obsolete systems.
Q: What is the warranty?
12 months from the date of purchase.
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Original Source: https://www.oiltechcontrols.com/
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