Qnix 8500, Basic, Ferrous & Non-Ferrous, Digital Dual Probe, 0-80 mils, by TestCoat

A modular system with interchangeable probes


The QNix 8500 allows you to accurately measure coating thickness on iron and steel substrates as well as non-magnetic metal substrates, such as aluminum, zinc, copper, brass and stainless steel. The gauge features a modular system with interchangeable probes.

In addition, you will benefit from bi-directional wireless communication with your PC, multiple calibration options and a configurable language setting. Whether implementing a quality control management program, inspecting an outdoor structure, or using them on a liquid or powder line, this gauge will improve your job performance.


  • Clear graphic display with high resolution
  • All languages can be downloaded with QNix Software
  • State of the art keypad with illuminated keys 
  • Elegant modern design for One-Hand-Operation
  • Modular system with exchangeable digital probes
  • Durable chasis for on-site operations
  • Basic and Premium version available
  • Backlit display
  • Flip option by 180 degrees
  • Two color LED display to read measurement process, data transfer and monitoring of limits

Technical Data

Technical Data
Fe-Probe: Measurements on iron and steel substrates
NFe-Probe: Measurements on non-magnetic metal substrates, such as aluminum, zinc, copper, brass, stainless steel
Range: See specification of probes. With exchangeable probes - up to 5 mm measuring range
Resolution: 0.1 μm 0 to 99.9 μm 
1 μm 100 to 999 μm
0.01 mm ±1.00 mm
0.01 mil 0 to 9.99 mil
0.1 mil 10 to 100 mil
1 mil > 100 mil
Accuracy (* of reading): ±(1 μm + 2%*)
±(0.04 mil + 2%)
0 to 2000 μm
0 to 80 mil
> 2000 μm (80 mil)
(factory calibration on zero reference plates supplied with the gauge)
With the one-point or two-point calibration the accuracy can still be improved using the optionally available test shims.
Minimum Area: Fe-Probe: 20 x 20 mm(0.8” x 0.8”)
NFe-Probe: 20 x 20 mm(0.8” x 0.8”)
Min Curvature: Convex: 5 mm (0.2”)
Concave: 30 mm (1.2”)
Min Substrate Thickness: Fe-Probe: 0.2 mm (8 mil)
NFe-Probe: 0.05 mm (2 mil)
Interface: wireless 2.4 GHz, range max. 10 m (30 ft.) in undisturbed environment
Temp. Range: Storage: 32°F to 122°F (0°C to 50°C)
Operation: 14°F to 140°F (-10°C to 60°C)
Power Supply: 2 x AA batteries 1.5V Alkali, or 2 x AA rechargeable batteries 1.2V
Dimensions: 124 mm x 67mm x 33 mm (4.9” x 2.6” x 1.3”)
Weight: ca. 120 g (4.3 oz) gauge with batteries and probe
Wireless Probes must remain plugged into Gage for approx. 5 hours to fully charge.