1. Introduction
This manual provides detailed instructions for the safe and effective use of the GYS 059856 Paint Thickness Gauge. This portable device is designed for quick and easy measurement of non-magnetic coatings (such as paint or film) on metallic surfaces. It is an essential tool for various applications including the processing industry, automotive repair, metal treatment, chemical industry, and goods inspection.
Please read this manual thoroughly before operating the device and keep it for future reference.
2. Safety Information
- Always ensure the device is clean and dry before use.
- Do not expose the device to extreme temperatures, humidity, or direct sunlight.
- Avoid dropping or subjecting the device to strong impacts.
- Do not attempt to disassemble or repair the device yourself. Refer to qualified personnel for service.
- Keep the device out of reach of children.
- Dispose of batteries responsibly according to local regulations.
3. Product Overview
The GYS 059856 Paint Thickness Gauge features a compact design with an LCD display and intuitive controls.

Figure 1: Front view of the GYS 059856 Paint Thickness Gauge. The device is yellow with a black LCD screen at the top. Below the screen are three black buttons: 'MODE' on the left, 'UNIT' on the right, and 'ZERO' with a power symbol in the center bottom.
3.1 Key Components
- LCD Display: Shows measurement readings, units, and mode indicators.
- MODE Button: Used to switch between measurement modes (Single, Continuous, Differential).
- UNIT Button: Used to switch between metric (µm) and imperial (mils) units.
- ZERO Button: Used for zero calibration and powering the device on/off.
- Measurement Probe: Located at the bottom of the device, used to contact the surface for measurement.
4. Setup
4.1 Battery Installation
Locate the battery compartment on the back of the device. Insert the required batteries, ensuring correct polarity. Close the battery compartment securely.
4.2 Powering On/Off
Press and hold the ZERO button to power on the device. To power off, press and hold the ZERO button again. The device also features an automatic shut-off function to conserve battery life.
5. Operating Instructions
The GYS 059856 offers three measurement modes and supports both metric and imperial units.
5.1 Selecting Measurement Units
Press the UNIT button to toggle between metric (µm) and imperial (mils) units.
5.2 Measurement Modes
Press the MODE button to cycle through the following measurement modes:
- Single Measurement Mode: Takes a single reading each time the probe is placed on the surface.
- Continuous Measurement Mode: Continuously takes readings as the probe is moved across the surface.
- Differential Measurement Mode: Displays the difference between the current reading and a previously set reference value.
5.3 Taking a Measurement
- Ensure the surface to be measured is clean and free of debris.
- Select the desired measurement unit and mode.
- Place the measurement probe firmly and perpendicularly onto the coated metallic surface.
- Read the thickness value displayed on the LCD screen.
- Lift the device from the surface to prepare for the next measurement (in Single mode).
6. Calibration
Accurate measurements depend on proper calibration. The device supports three calibration functions:
6.1 Zero Calibration
This calibration is performed on an uncoated, bare metallic surface to establish a zero reference point. Place the probe on a clean, uncoated metal surface and follow the on-screen instructions or refer to the device's specific calibration sequence (usually involving the ZERO button).
6.2 Two-Point Calibration
This method uses two known thickness standards (e.g., a thin film and a thicker film) to calibrate the device across a range. This provides more accurate readings for varying thicknesses.
6.3 Easy Calibration
Refer to the device's specific instructions for "Easy Calibration," which may involve a simplified process for quick adjustments.
Note: Always calibrate the device before critical measurements or if you suspect inaccurate readings.
7. Maintenance
- Cleaning: Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Storage: Store the device in a dry, cool place, away from direct sunlight and extreme temperatures. If storing for extended periods, remove the batteries.
- Probe Care: Keep the measurement probe clean and free from scratches or damage.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Low or dead batteries; incorrect battery polarity. | Replace batteries; check battery orientation. |
| Inaccurate readings. | Device not calibrated; dirty probe; surface not clean; incorrect measurement mode. | Perform calibration; clean probe and surface; select appropriate measurement mode. |
| Display shows "OL" or "Err". | Measurement range exceeded; sensor error. | Ensure measurement is within device's range; restart device. If error persists, contact support. |
9. Specifications
- Model: GYS 059856
- Manufacturer: GYS
- Product Dimensions (L x W x H): 10.5 x 6.1 x 2.8 cm
- Weight: 137 grams
- Measurement Principle: Non-magnetic coating on metallic surfaces
- Measurement Units: Metric (µm), Imperial (mils)
- Measurement Modes: Single, Continuous, Differential
- Calibration Functions: Zero calibration, 2-point calibration, Easy calibration
- Automatic Shut-off: Yes
- ASIN: B09GS7G1N4
- Manufacturer Reference: 059856
- Spare Parts Availability: Information not available
10. Warranty and Support
For warranty information and technical support, please refer to the official GYS website or contact your local distributor. Information regarding spare parts availability is not provided in the product specifications.
GYS Official Website: www.gys.fr





