GT2-71P Keyence Digital Contact Sensor Amplifier Unit
GT2-71P is a high-accuracy digital contact sensor amplifier unit from the Keyence GT2 series. It mounts on a DIN rail. It uses a PNP output and works as a main unit. This unit is active and in production. Keyence confirms its official status. Engineers choose it for precise position and dimension checks in automation lines.
Keyence builds this amplifier for micro-level measurement. It reads down to 0.1 µm. The display range is wide. It covers -199.999.9 to 199.999.9. Response time is selectable. You can set it to hsp(3)/5/10/100/500/1,000 ms. For GT2-Pxxx heads, use hsp(12)/20/40/400/2,000/4,000 ms. This makes it flexible for slow and fast processes.
This unit has no built-in communication port. But you can add a GT2 series communication unit separately. That expands its network options. The amplifier uses a no-voltage control input for timing, preset, reset, and bank switching. It runs on 10 to 30 VDC. Power draw is low. It needs 2,200 mW or less (73.3 mA or less at 30 V).
The output section offers HH/HI/GO/LO/LL PNP open collector. Ratings are 40 V / 50 mA or less. Residual voltage is 1 V or less. Operating temperature is -10 to +50 °C. No freezing allowed. Humidity range is 35 to 85 % RH. No condensation. The unit weighs about 140 g including the power cable. Mount it vertically or horizontally on a DIN rail. Keep airflow clear around the vents.
Technical Specifications
| Parameter | Value |
|---|---|
| Brand | Keyence |
| Model | GT2-71P |
| Series | GT2 series |
| Type | High-accuracy digital contact sensor amplifier unit |
| Mounting | DIN-rail mount, main unit |
| Display range | -199.999.9 to 199.999.9 |
| Display resolution | 0.1 µm |
| Response time | hsp(3)/5/10/100/500/1,000 ms; hsp(12)/20/40/400/2,000/4,000 ms with GT2-Pxxx heads |
| Control input | Timing / preset / reset / bank no-voltage input |
| Built-in ports | None |
| Protocols | None |
| Communication expansion | Via optional GT2 series communication units (sold separately) |
| Supply voltage | 10 to 30 VDC, ripple (p-p) 10 % included, Class 2 |
| Power consumption | 2,200 mW or less (73.3 mA or less at 30 V) |
| Output type | HH/HI/GO/LO/LL PNP open collector, 40 V / 50 mA or less, residual voltage 1 V or less |
| Operating temperature | -10 to +50 °C (No freezing) |
| Storage temperature | Not available |
| Relative humidity | 35 to 85 % RH (No condensation) |
| Protection rating | Not available |
| Dimensions (H×W×D) | Not available |
| Weight | Approx. 140 g (including power cable) |
| Lifecycle | Active; official Keyence production status confirmed via product/spec page (Last verified: 2026-09) |
Installation Guide
- Mount the GT2-71P on a standard DIN rail. Use the main unit clip.
- Keep the unit away from high-voltage lines and inverters. This reduces noise.
- Connect the 10 to 30 VDC supply. Watch the ripple. Keep it under 10 % p-p.
- Wire the control input for timing, preset, reset, or bank switching as needed.
- Use the PNP open collector output with a load under 50 mA.
- Allow free air around the unit. Do not block the vents.
Debugging and Maintenance
- Check the display for error codes. The 0.1 µm resolution helps spot drift fast.
- Clean the sensor head and amplifier vents with dry air. Do not use solvents.
- Verify the response time setting. Match it to your machine cycle.
- Test the HH/HI/GO/LO/LL outputs with a meter. Confirm residual voltage is under 1 V.
- Replace the power cable if the weight or bend stress looks high.
Compatibility Notes
The GT2-71P works with GT2 series sensor heads. It also supports optional GT2 communication units. These add network functions. The unit has no built-in port. So you need a separate communication unit for fieldbus or serial links. This amplifier fits existing GT2 racks. It is a main unit. Do not use it as an expansion unit.
Certification Information
Keyence confirms the GT2-71P as active and in production. Official product and spec pages verify this status. Last verified: 2026-09. For specific certifications such as CE or UL, contact your Keyence representative. This listing does not claim extra approvals beyond the official Keyence data.
Packing List
- GT2-71P amplifier unit × 1
- Power cable × 1
- DIN rail mounting clip (attached) × 1
- Quick reference sheet × 1 (if supplied by Keyence)
Warranty and Shipping
Oiltech Controls offers a 12-month warranty on this unit. We ship by FedEx, UPS, and DHL. Choose the service that fits your lead time. We test and verify each unit before shipment. This reduces downtime risk for your line.
Typical Applications
- Semiconductor wafer thickness checks
- Electronic component height measurement
- Precision stage position feedback
- Automotive parts gap and flush inspection
- Small motor shaft runout detection
- Glass and film thickness verification
Diagnostic Capabilities
The GT2-71P gives fast GO/NO-GO judgment. It shows HH, HI, GO, LO, and LL states. The 0.1 µm resolution helps catch tiny changes. You can set response time to filter noise. The no-voltage input lets you trigger, preset, reset, or switch banks. This supports in-line diagnosis without a PC. For deeper data, add a GT2 communication unit.
Why Buy From Oiltech Controls?
- 15+ years in industrial automation spare parts
- Global shipment support
- Tested industrial surplus and refurbished options
- 12-month warranty
- Technical verification before shipment
- Support for obsolete control systems
Contact us for inquiries: info@oiltechcontrols.com or +86 158 8020 0923 (WhatsApp).
FAQ
Q: Does the GT2-71P have built-in communication?
A: No. It has no built-in port or protocol. You need an optional GT2 series communication unit for network links.
Q: What is the display resolution?
A: It is 0.1 µm. The display range is -199.999.9 to 199.999.9.
Q: Can I use GT2-Pxxx heads with this amplifier?
A: Yes. When you use GT2-Pxxx heads, the response time changes to hsp(12)/20/40/400/2,000/4,000 ms.
Q: What output type does it use?
A: It uses HH/HI/GO/LO/LL PNP open collector. Max load is 40 V / 50 mA. Residual voltage is 1 V or less.
Q: What is the supply voltage?
A: 10 to 30 VDC, with ripple (p-p) 10 % included, Class 2.
Q: How much does it weigh?
A: About 140 g, including the power cable.
Q: What is the warranty?
A: 12 months from Oiltech Controls.
Q: How do you ship?
A: We ship by FedEx, UPS, and DHL. We verify each unit before shipment.
Copyright © 2026 Oiltech Controls Limited. All rights reserved.
Original Source: https://www.oiltechcontrols.com/
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