GT2-71CP High-Accuracy Digital Contact Sensor Amplifier by Keyence
The GT2-71CP is a high-accuracy digital contact sensor amplifier unit from the Keyence GT2 series. It delivers 0.1 µm display resolution for precise position and thickness measurement. This DIN-rail main unit uses a PNP open collector output and provides 4 to 20 mA analog output. It works with GT2-Pxxx heads for expanded response time options.
Engineers choose the GT2-71CP for stable signal processing, fast setup, and long-term reliability in automated inspection and measurement tasks. The unit supports timing, preset, reset, and bank no-voltage control inputs. Communication expansion is available through optional GT2 series communication units.
Technical Specifications
| Brand | Keyence |
| Model | GT2-71CP |
| 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 |
| 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 |
| Analog output | 4 to 20 mA, max. load resistance 350 Ω |
| Built-in ports | None |
| Protocols | None |
| Communication expansion | Via optional GT2 series communication units (sold separately) |
| 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 |
Performance and Environmental Tolerance
- Measurement range: ±199.999.9 display units, ideal for fine displacement checks.
- Frequency response: Fast hsp modes down to 3 ms for dynamic contact sensing.
- Sensitivity: Stable PNP output with low residual voltage (1 V or less).
- Linearity: High-accuracy amplifier design supports repeatable analog 4 to 20 mA signals.
- Resolution: 0.1 µm display resolution for micro-level measurement.
- Temperature range: -10 to +50 °C operating, no freezing.
- Environmental resistance: 35 to 85 % RH, no condensation.
- Noise immunity: Class 2 supply with ripple tolerance; robust industrial design.
Installation Guide
Mount the GT2-71CP on a standard DIN rail inside a control cabinet. Keep the unit away from high-voltage lines and strong magnetic fields. Use the specified 10 to 30 VDC Class 2 power supply. Connect GT2-Pxxx sensor heads to the amplifier before power-on. Wire the PNP open collector outputs to the PLC or indicator. For analog use, keep load resistance below 350 Ω. Confirm all wiring before applying power.
Setup and Maintenance Convenience
- Front-panel keys allow quick preset, reset, and bank switching.
- No-voltage control inputs simplify integration with existing machines.
- DIN-rail mount saves panel space and speeds replacement.
- Optional communication units add data output when needed.
- Routine checks include cleaning the sensor head and verifying cable connections.
Compatibility Notes
The GT2-71CP works with Keyence GT2 series contact sensor heads, including GT2-Pxxx models. It does not include built-in communication ports. For network or data logging, add a compatible GT2 communication unit. The amplifier supports PNP input devices and 4 to 20 mA analog receivers. Always match the sensor head response time to your measurement speed.
Certification and Packaging
This unit carries the official Keyence production status. Please confirm local certification requirements before installation. The package typically includes the GT2-71CP amplifier unit and power cable. Weight is approximately 140 g. Contact us for the latest compliance documents.
Warranty and Shipping
Oiltech Controls offers a 12-month warranty on this product. We ship worldwide via FedEx, UPS, and DHL. Each order is packed for safe transit. Tracking details are provided after dispatch.
Typical Applications
- Thickness measurement of films, sheets, and plates.
- Position verification in automated assembly lines.
- Go / No-Go inspection using HH, HI, GO, LO, LL outputs.
- Wear and gap checking on production tooling.
- Analog feedback for closed-loop positioning systems.
- Quality control in electronics, automotive, and packaging.
Diagnostic Capabilities
The GT2-71CP provides multiple comparator outputs for fast pass/fail decisions. The 4 to 20 mA analog signal helps monitor trends and detect drift. Users can set preset and reset values to simplify calibration. Bank switching allows stored settings for different products. When paired with optional communication units, the amplifier can send measurement data to higher-level systems for logging and diagnostics.
Why Buy From Oiltech Controls?
- 15+ years of industrial automation spare parts experience.
- Global shipment support with trusted carriers.
- Tested industrial surplus and refurbished options available.
- 12-month warranty on eligible products.
- Technical verification before every shipment.
- Support for obsolete control systems and legacy equipment.
Contact us for inquiries: info@oiltechcontrols.com or +86 158 8020 0923 (WhatsApp).
FAQ
Q: What is the display resolution of the GT2-71CP?
A: It provides 0.1 µm display resolution.
Q: Does this amplifier have built-in communication ports?
A: No. You can add optional GT2 series communication units.
Q: What output types does it support?
A: It has HH / HI / GO / LO / LL PNP open collector outputs plus 4 to 20 mA analog output.
Q: What is the supply voltage range?
A: 10 to 30 VDC, Class 2, with ripple tolerance.
Q: Can I use GT2-Pxxx sensor heads?
A: Yes. The response time changes to hsp(12)/20/40/400/2,000/4,000 ms with those heads.
Q: What is the warranty period?
A: Oiltech Controls offers a 12-month warranty.
Q: How do you ship?
A: We ship via FedEx, UPS, and DHL worldwide.
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