GT2-72N Keyence Amplifier Unit DIN-Rail NPN 0.1 µm Resolution Expansion

GT2-72N Keyence Digital Contact Amplifier Unit

The GT2-72N is a high-accuracy amplifier unit for the GT2 series. It mounts on DIN rail and works as an expansion unit. Display range spans -199.999.9 to 199.999.9. Display resolution is 0.1 µm. Response time is selectable from hsp(3) ms to 1,000 ms. With GT2-Pxxx heads, the range extends to 4,000 ms. The GT2-72N runs on 10 to 30 VDC. Output is HH/HI/GO/LO/LL NPN open collector. Control inputs include timing, preset, reset, and bank. No built-in ports. Communication needs optional GT2 series units. This amplifier pairs with GT2 sensor heads for precise position and dimension checks.

Core Specifications

• Brand: Keyence
• Model: GT2-72N
• Series: GT2 series
• Type: High-accuracy digital contact sensor amplifier unit
• Mounting: DIN-rail mount, expansion 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
• Response with GT2-Pxxx heads: hsp(12)/20/40/400/2,000/4,000 ms
• Control input: Timing / preset / reset / bank no-voltage input

Electrical Data

• Supply voltage: 10 to 30 VDC, ripple (p-p) 10%, Class 2
• Power consumption: 2,200 mW or less (73.3 mA or less at 30 V)
• Output type: HH/HI/GO/LO/LL NPN open collector
• Output rating: 40 V / 50 mA or less, residual voltage 1 V or less
• Built-in ports: None
• Protocols: None
• Communication expansion: Via optional GT2 series communication units (sold separately)

Environmental and Physical

• Operating temperature: -10 to +50 °C (no freezing)
• Relative humidity: 35 to 85 % RH (no condensation)
• Protection rating: Not available
• Storage temperature: Not available
• Weight: Approx. 140 g (including power cable)
• Dimensions (H×W×D): Not available

Oiltech Controls Review

• The GT2-72N is the brain for GT2 series contact heads.
• 0.1 µm display resolution suits tight tolerance work.
• Five-level judgment (HH/HI/GO/LO/LL) speeds up sorting.
• DIN-rail mount saves panel space and cuts wiring time.
• Expansion unit design scales up without replacing the main amp.
• Selectable response time balances speed and noise.
• Pairs with GT2-A12KL and other GT2 heads.

Oiltech Controls Insight: Suitable Equipment

• Automated gauging stations for shaft and bore diameter.
• Thickness and height checks on assembly lines.
• Press-fit monitoring for connectors and bearings.
• Glass and wafer thickness measurement.
• Robot end-effector position feedback.
• Quality gates with multi-level pass/fail sorting.

Installation and Commissioning

• Clip the GT2-72N onto a standard DIN rail.
• Connect the GT2 sensor head to the amplifier input.
• Wire the NPN outputs to the PLC or sorting logic.
• Set response time to match the line speed.
• Use timing or preset input for fast re-zero.
• Check the display against a known master part.

Maintenance and Debugging

• Verify the display zero after head replacement.
• Use preset input to reset without power cycling.
• Check output LEDs for HH, HI, GO, LO, LL states.
• Clean the sensor head if readings drift.
• Confirm 24 VDC supply stays within 10 to 30 VDC.

Compatibility Notes

• Works with GT2 series contact sensor heads.
• Adds channels as an expansion unit to a main amplifier.
• Communication needs optional GT2 series units.
• NPN output fits most PLC input cards.
• No IO-Link or Ethernet built in.

Five Professional FAQs

Q: What is the difference between the main unit and an expansion unit?

A: The expansion unit adds channels but needs a main amplifier for setup and display. The GT2-72N works as a slave. Plan your rack layout before ordering.

Q: How do I choose the right response time?

A: Use hsp(3) ms for fast sorting. Use 100 ms or more for noisy or vibrating targets. Slower settings give a more stable display.

Q: Can I use the GT2-72N without a GT2 sensor head?

A: No. The amplifier needs a GT2 series head for input. Match the head type to your measuring range and force needs.

Q: What do HH, HI, GO, LO, and LL mean?

A: These are five judgment levels. HH is highest, LL is lowest. GO is the pass band. You can sort parts into five groups without extra logic.

Q: How do I add communication to the GT2-72N?

A: Use an optional GT2 series communication unit. It clips onto the DIN rail beside the amplifier. This adds Ethernet or serial output for data logging.

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 eligible units.
• Technical verification before shipment.
• Support for obsolete control systems.

Contact us: info@oiltechcontrols.com or +86 158 8020 0923 (WhatsApp). We reply fast.

Shipping and Warranty

• Ships in 24 to 28 hours after order confirmation.
• Couriers: FedEx, UPS, DHL.
• 12-month warranty from Oiltech Controls Limited.
• Technical check before dispatch.
• Tracking number provided after pickup.

Packaging List

• 1x Keyence GT2-72N amplifier unit
• Power cable
• DIN-rail mounting clip
• Protective packaging

Copyright © 2026 Oiltech Controls Limited. https://www.oiltechcontrols.com/ All rights reserved.