Keyence GT-A22 Air Push Sensor Head | GT Series

Keyence GT-A22 Air Push Sensor Head

Product Introduction

The GT-A22 belongs to the Keyence GT series, a family of general-purpose digital contact sensors. Specifically, this model combines an air push mechanism with a long 22 mm stroke for automated inspection. Furthermore, the pneumatic actuation extends and retracts the contact element using dry air pressure. Meanwhile, the sensor head carries no built-in amplifier, so it relies on a compatible GT series amplifier for power and signal conversion.

Technical Specifications

The GT-A22 sensor head achieves a repeatability of 8 µm at 23 °C with a 100 ms response setting. Additionally, the air push design maintains consistent contact force across different mounting orientations. Downward mounting produces 1.5 N, side mounting yields 1.4 N, and upward mounting results in 1.3 N. These values support stable contact on larger workpieces and deep measurement points.

Moreover, the pneumatic section tolerates a pressure resistance of 1.0 MPa. The applied pressure range spans 0.35 to 0.5 MPa, and the working fluid must be dry air. Besides, the 2-meter cable and approximately 180 g body weight keep installation manageable. For operation, the GT-A22 connects to a GT series amplifier, which supplies excitation and processes the LVDT signal.

Mechanical and Environmental Parameters

The GT-A22 operates reliably in demanding factory conditions. Its ambient temperature rating spans 0 to +55 °C with no freezing permitted. Additionally, the relative humidity tolerance covers 35 to 85 % RH without condensation. Furthermore, the housing carries an IP67 protection rating, so dust and temporary water exposure pose little risk.

First, confirm that the air supply is clean and dry before connection. Next, regulate the pressure within the 0.35 to 0.5 MPa window for consistent actuation. Finally, verify that the mounting orientation matches your required contact force.

Installation Guide

Installing the GT-A22 requires both pneumatic and electrical connections. First, connect the 2-meter cable to the GT series amplifier input according to the amplifier manual. Next, attach the air tube to the push port and set the regulator within the specified range. Then, secure the sensor head using its mounting threads or bracket accessories.

Furthermore, calibrate the amplifier after the air pressure stabilizes. For instance, set the response time to 100 ms to achieve the rated 8 µm repeatability. Besides, keep the contact element and air line free from moisture and debris. In addition, check the air filter regularly to prevent contamination inside the pneumatic chamber.

Packaging List

• 1 × Keyence GT-A22 Sensor Head

• 1 × 2-meter Connection Cable (attached)

FAQ

Q1: Does the GT-A22 work without an amplifier?
No. The GT-A22 is a sensor head only. It requires a compatible Keyence GT series amplifier for power supply and signal output.

Q2: What air pressure does the GT-A22 require?
The GT-A22 operates within an applied pressure range of 0.35 to 0.5 MPa. Always use dry air as the working fluid.

Q3: What is the difference between GT-A22 and GT-A10?
The GT-A22 offers a longer 22 mm stroke with higher contact force. The GT-A10 provides a shorter 10 mm range and finer 3 µm repeatability.

Q4: How do you ship this item?
We ship via Fedex, UPS, DHL with tracking. Delivery times vary by destination and selected service.

Q5: Is the GT-A22 protected against dust and water?
Yes. The GT-A22 carries an IP67 protection rating, covering dust ingress and temporary immersion.