GT2-72CN High-Accuracy Digital Contact Sensor Amplifier by Keyence
The Keyence GT2-72CN is a high-accuracy amplifier unit for the GT2 series. It mounts on a DIN rail. This expansion unit delivers 0.1 µm display resolution. It also provides NPN outputs and a 4 to 20 mA analog signal. Engineers use it for precise position and thickness checks. The unit supports fast response modes. It works with GT2-Pxxx heads for extended response settings.
This amplifier suits inline measurement, fixture monitoring, and automated assembly. It offers stable readings in industrial environments. The GT2-72CN is an active Keyence product. Oiltech Controls supplies tested units with a 12-month warranty.
Technical Specifications
| Parameter | Value |
|---|---|
| Brand | Keyence |
| Model | GT2-72CN |
| 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; 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 NPN open collector, 40 V / 50 mA or less, residual voltage 1 V or less |
| Analog Output | 4 to 20 mA, max. load resistance 350 Ω |
| Operating Temperature | -10 to +50 °C (No freezing) |
| Relative Humidity | 35 to 85 % RH (No condensation) |
| Weight | Approx. 140 g (including power cable) |
| Lifecycle | Active; official Keyence production status confirmed via product/spec page (Last verified: 2026-09) |
Measurement Performance
- Measurement range: -199.999.9 to 199.999.9
- Frequency response: Selectable from hsp(3) to 4,000 ms
- Sensitivity: Set by connected GT2 sensor head
- Linearity: Depends on GT2 head specification
- Resolution: 0.1 µm
- Temperature range: -10 to +50 °C
- Environmental tolerance: 35 to 85 % RH, no condensation
- Interference resistance: Stable NPN open collector outputs with low residual voltage
Installation Guide
- Mount the GT2-72CN on a standard DIN rail.
- Use it as an expansion unit beside a main amplifier.
- Connect a compatible GT2 sensor head to the unit.
- Wire the 10 to 30 VDC supply with correct polarity.
- Keep signal cables away from high-power lines.
- Confirm the analog load stays below 350 Ω.
Setup and Maintenance Convenience
- Front controls allow quick timing and preset changes.
- Bank input supports fast product changeover.
- No built-in communication port means simple standalone use.
- Optional communication units add network functions later.
- Routine checks include cable seating and clean terminals.
- No special calibration tool is required for basic setup.
Compatibility Notes
- Works with GT2 series sensor heads.
- Use GT2-Pxxx heads for extended response times.
- Add optional GT2 communication units for network links.
- Designed for DIN-rail expansion racks.
- NPN output suits common PLC and control inputs.
- Analog 4 to 20 mA output fits standard data loggers.
Certification and Packaging
- Keyence production status: Active (verified 2026-09).
- Certification details: Contact Oiltech Controls for current documents.
- Packaging: Amplifier unit, power cable, and protective packing.
- Weight: Approx. 140 g including power cable.
- Warranty: 12 months.
- Shipping: FedEx, UPS, DHL.
Typical Applications
- Inline thickness measurement
- Position verification on fixtures
- Automated assembly checks
- Parts presence and gap detection
- Obsolete control system support
- Quality inspection stations
Diagnostic Capabilities
- HH/HI/GO/LO/LL outputs show part status clearly.
- Analog output supports trend monitoring.
- Timing input helps capture peak readings.
- Preset and reset inputs simplify fault recovery.
- Bank input allows rapid recipe switching.
- Stable NPN outputs reduce false triggers.
Why Buy From Oiltech Controls?
- More than 15 years in industrial automation spare parts.
- We ship worldwide with FedEx, UPS, and DHL.
- Tested surplus and refurbished options are available.
- Every unit includes a 12-month warranty.
- We verify technical condition before shipment.
- We support obsolete control systems.
Contact us for inquiries: info@oiltechcontrols.com or +86 158 8020 0923.
FAQ
- Q: What is the display resolution?
A: The GT2-72CN offers 0.1 µm resolution. - Q: Does it have built-in communication?
A: No. Add optional GT2 communication units for network use. - Q: What output type does it use?
A: It uses HH/HI/GO/LO/LL NPN open collector outputs. - Q: What analog signal does it provide?
A: It provides 4 to 20 mA with max. 350 Ω load. - Q: What is the warranty?
A: Oiltech Controls offers a 12-month warranty. - Q: How fast can it respond?
A: Response starts at hsp(3) ms and extends to 4,000 ms with GT2-Pxxx heads.
Copyright © 2026 Oiltech Controls Limited. All rights reserved.
Original Source: https://www.oiltechcontrols.com/
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