GT-75AP Keyence Digital Contact Sensor Amplifier Unit
GT-75AP is a panel mount main unit from the Keyence GT series. It turns contact sensor signals into fast, stable digital readings. Engineers use it for position, thickness, and gap checks on production lines.
This amplifier offers 1 µm display resolution and a 2,000 times/second sampling rate. Seven response times let you match speed and stability. The PNP open collector output works with many PLCs and control systems.
No built-in communication ports. Add optional GT series communication units for fieldbus or serial links. This keeps the main unit compact and flexible.
Technical Specifications
| Brand | Keyence |
| Model | GT-75AP |
| Series | GT series |
| Type | Digital contact sensor amplifier unit, panel mount, main unit |
| Display range | -99.999 to 999.999 |
| Resolution | 1 µm |
| Sampling rate | 2,000 times/second |
| Response time | hsp (1.5 ms), 5 ms, 10 ms, 100 ms, 500 ms, 1 s, 5 s (selectable) |
| Output type | HIGH/GO/LOW PNP open collector, max. 50 mA (40 V or less), residual voltage 1 V or less, N.O./N.C. selectable |
| Supply voltage | 12 to 24 VDC, ripple (p-p) 10 % or less |
| Power consumption | Normal: 1,140 mW (95 mA) or less at 12 V / 1,200 mW (50 mA) or less at 24 V; Eco: 600 mW (50 mA) or less at 12 V / 840 mW (35 mA) or less at 24 V |
| Operating temperature | -10 to +55 °C (No freezing) |
| Relative humidity | 35 to 85 % RH (No condensation) |
| Weight | Approx. 110 g (including power cable) |
| Built-in ports | None |
| Protocols | None |
| Communication expansion | Via optional GT series communication units (sold separately) |
| Lifecycle status | Active; official Keyence production status confirmed (Last verified: 2026-09) |
Installation Guide
- Mount the GT-75AP on a panel. Use the main unit only. No extra base needed.
- Connect a GT series contact sensor to the amplifier input.
- Wire the PNP open collector output to your PLC or indicator. Max load 50 mA.
- Apply 12 to 24 VDC power. Keep ripple below 10 % p-p.
- Set response time to match your machine speed. Start with 5 ms for general use.
- For communication, add an optional GT series communication unit.
Commissioning and Maintenance
- Zero the display before measurement. Use the panel keys.
- Check HIGH/GO/LOW output logic. Set N.O. or N.C. as needed.
- Clean the sensor contact tip regularly. Avoid oil and dust build-up.
- Verify 1 µm resolution with a gauge block after setup.
- Keep the unit within -10 to +55 °C. Do not freeze.
- Use Eco mode to cut power to 600 mW at 12 V when speed is not critical.
Compatibility Notes
- Works with Keyence GT series contact sensors.
- Outputs are PNP open collector. Check your PLC input type.
- No built-in serial or fieldbus. Add a GT communication unit for networks.
- Panel mount size fits standard cutouts. Weight is about 110 g with cable.
- For obsolete control systems, this unit can replace older GT amplifiers with same wiring.
Certifications
Keyence confirms GT-75AP as active production. Official product page verifies specs. No CE or UL mark listed in the source data. Always check local rules for your site.
Package Contents
- GT-75AP amplifier unit (main unit, panel mount)
- Power cable
- Quick reference guide (Keyence standard)
Optional communication units sold separately. Contact us for bundle pricing.
Warranty and Shipping
All purchases include a 12-month warranty from Oiltech Controls. We ship by FedEx, UPS, or DHL. Tracking number sent after dispatch. Technical verification before shipment on every order.
Typical Applications
- Go/no-go gauge checks on assembly lines
- Thickness measurement of sheet metal or plastic
- Gap and step detection in automotive parts
- Position feedback on press-fit machines
- Wear inspection on cutting tools
Diagnostic Capability
- Real-time display shows -99.999 to 999.999 for quick fault finding.
- Output LEDs show HIGH, GO, or LOW state.
- Response time selection helps isolate noise or vibration issues.
- Eco mode confirms power draw. Use for battery or low-power checks.
- No built-in error log. External PLC can monitor output changes.
Why Buy From Oiltech Controls?
- 15+ years in industrial automation spare parts.
- Global shipment support to your site.
- Tested surplus and refurbished options available.
- 12-month warranty on every unit.
- 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 GT-75AP have built-in communication?
A: No. Add a GT series communication unit for serial or fieldbus.
Q: What is the smallest resolution?
A: 1 µm on the display.
Q: Can I use this with a sourcing PLC input?
A: Yes. Output is PNP open collector. Max 50 mA.
Q: What response time should I start with?
A: Start with 5 ms. Go faster only if your signal is clean.
Q: Is the sensor included?
A: No. This is the amplifier unit only. Order a GT series sensor separately.
Q: What is the warranty?
A: 12 months from Oiltech Controls.
Q: How fast is shipping?
A: We use FedEx, UPS, or DHL. Delivery time depends on your location.
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Keyence GT-75AP digital contact sensor amplifier. Panel mount, PNP output, 1 µm resolution, 2,000 Hz sampling. 12-month warranty. Fast global shipping. Buy now.
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