Keyence GT-A22 Digital Contact Sensor Head | Air Push, 22 mm Stroke
The GT-A22 is a general purpose digital contact sensor head from the Keyence GT series. Moreover, it uses an air push mechanism and offers a 22 mm measuring range. This sensor head connects to a GT series amplifier for signal processing. In addition, it suits dimensional inspection, position checking, and automated gauging in industrial environments. The IP67 rating protects it from dust and water. Furthermore, the GT-A22 works with dry air at 0.35 to 0.5 MPa and withstands up to 1.0 MPa pressure. Repeatability is 8 µm at 23 °C with a 100 ms response. Therefore, measuring force varies by mounting: 1.5 N downward, 1.4 N side, and 1.3 N upward. The sensor head weighs about 180 g with a 2-m cable. Additionally, it operates from 0 to +55 °C and 35 to 85 % RH without condensation. No built-in ports or protocols exist; instead, the GT amplifier handles communication. This unit is active and in official production as of September 2026.
Technical Specifications
| Parameter | Value |
|---|---|
| Brand | Keyence |
| Model | GT-A22 |
| Series | GT series |
| Sensor Type | Digital contact (LVDT) displacement sensor head |
| Type | Air push |
| Measuring Range | 22 mm |
| Measuring Force (Downward) | 1.5 N |
| Measuring Force (Side) | 1.4 N |
| Measuring Force (Upward) | 1.3 N |
| Repeatability | 8 µm (at 23 °C, response 100 ms) |
| Pressure Resistance | 1.0 MPa |
| Applied Pressure Range | 0.35 to 0.5 MPa |
| Fluid | Dry air |
| Built-in Ports | None |
| Protocols | None |
| Communication Expansion | None |
| Supply Voltage | Not available (powered by GT series amplifier) |
| Power Consumption | Not available |
| Output Type | Not available (sensor head; connects to GT amplifier) |
| Operating Temperature | 0 to +55 °C (No freezing) |
| Storage Temperature | Not available |
| Relative Humidity | 35 to 85 % RH (No condensation) |
| Protection Rating | IP67 |
| Dimensions (H×W×D) | Not available |
| Weight | Approx. 180 g (with 2-m cable) |
| Lifecycle | Active; official Keyence production status confirmed (Last verified: 2026-09) |
Installation Guide
- First, mount the GT-A22 in downward, side, or upward orientation. Therefore, measuring force changes with position.
- Then, use dry air only. Also, keep pressure between 0.35 and 0.5 MPa.
- Moreover, do not exceed 1.0 MPa pressure resistance.
- Next, connect the sensor head cable to a compatible GT series amplifier.
- In addition, operate within 0 to +55 °C and 35 to 85 % RH without condensation.
- Finally, maintain the IP67 seal. Also, avoid sharp impacts on the contact tip.
Debugging and Maintenance Convenience
- Air push design reduces wear on the contact tip. Consequently, this lowers maintenance needs.
- Repeatability of 8 µm allows stable, repeatable measurements after setup.
- No built-in electronics means fewer failure points. Thus, the amplifier handles signal conditioning.
- IP67 rating permits washdown and dusty environments. Therefore, clean the exterior with a damp cloth.
- Check air supply for moisture and oil. In addition, dry air extends sensor life.
Compatibility Notes
- Works only with Keyence GT series amplifiers.
- No direct communication ports or protocols. Instead, the amplifier provides output and interfacing.
- Not a standalone sensor. Therefore, a GT amplifier is required for power and signal readout.
- Replacement or surplus units may need technical verification before shipment. Moreover, contact us for details.
Certifications and Compliance
- Protection rating: IP67 (dust tight and water immersion resistant).
- Keyence official production status confirmed. Furthermore, last verified September 2026.
- No specific safety certifications listed for this sensor head. However, check with the amplifier for system-level approvals.
Package Contents
- 1 x Keyence GT-A22 sensor head
- 2-m cable attached
- No amplifier included
- No mounting hardware included
Warranty and Shipping
- 12-month warranty against defects.
- Shipping via FedEx, UPS, or DHL. Also, global support available.
- Each unit undergoes technical verification before shipment.
- Tested industrial surplus and refurbished options may be available. Therefore, ask our team.
Typical Applications
- Dimensional inspection on production lines
- Position checking for fixtures and tooling
- Automated gauging in harsh or wet areas (IP67)
- Thickness measurement of parts and materials
- Go/no-go checking in assembly processes
- Integration into obsolete control systems needing GT series parts
Diagnostic Capabilities
- Amplifier-based diagnostics. Moreover, the GT amplifier shows signal status and errors.
- Repeatability check: use a known reference to verify 8 µm stability.
- Air pressure monitoring helps detect supply issues.
- No onboard LEDs or self-test on the sensor head.
Why Buy From Oiltech Controls?
- 15+ years in industrial automation spare parts.
- Global shipment support to many countries.
- Tested industrial surplus and refurbished options. Furthermore, each unit verified.
- 12-month warranty on every sale.
- Technical verification before shipment. In addition, we check function and condition.
- Support for obsolete control systems. Moreover, hard-to-find parts are our specialty.
- Contact us for inquiries: info@oiltechcontrols.com or +86 158 8020 0923 (WhatsApp).
FAQ
- Q: Does the GT-A22 work alone?
A: No. Therefore, it needs a Keyence GT series amplifier for power and signal output. - Q: What air pressure should I use?
A: Use dry air at 0.35 to 0.5 MPa. Also, do not exceed 1.0 MPa. - Q: What is the repeatability?
A: 8 µm at 23 °C with a 100 ms response. - Q: Is the sensor waterproof?
A: Yes. Moreover, it has an IP67 rating for dust and water protection. - Q: What is the warranty?
A: 12 months against defects. - Q: How fast is shipping?
A: We ship via FedEx, UPS, or DHL. Therefore, delivery time depends on your location. - Q: Can I use it in an upward mounting position?
A: Yes. In addition, measuring force is 1.3 N for upward mounting. - Q: Do you offer tested surplus units?
A: Yes. Furthermore, we verify each unit before shipment. Contact us for stock.
Copyright © 2026 Oiltech Controls Limited. All rights reserved.
Original Source: https://www.oiltechcontrols.com/
Reviews
There are no reviews yet.