Oil Film Thickness Measurement
Industry Automotive Applications Oil Film Measurement Type Level Description A top marine engine manufacturer commissioned MTI Instruments to design and manufacture a non-contact sensor to measure the microscopic oil film layer between the engine cylinder wall and the piston ring. Engine testing is normally performed through a range of low RPM’s to high RPM’s (400- 6000) with piston linear speeds approaching 500 inches/second and at various torques. A measuring system with high frequency response and small sensor size was essential to keep engine machining to a minimum while not altering [...]
Standard Capacitance Probes
P/N Model Measurement Range Min. Range Stand-Off Resolution Spot Size Interface Type Request Info 8100-0001-000 Capacitance Probe: ASP-25M-CTA 25µm (1mil/s) 1.27µm (0.05mil/s) Max. Range Extension: 10x @50Hz: 0.2nm (0.008µin) – @5kHz: 1.5nm (0.06µin) 1.09mm (0.043in) SMA connector CTA Request Info 8100-0002-000 Capacitance Probe: ASP-50M-CTA 50µm (2mil/s) 2.54µm (0.1mil/s) Max. Range Extension: 9x @50Hz: 0.3nm (0.012µin) – @5kHz: 3nm(0.119µin) 1.55mm (0.061in) SMA connector CTA Request Info 8100-0003-000 Capacitance Probe: ASP-125M-CTA 125µm (5mil/s) 6.35µm (0.25mil/s) Max. Range Extension: 10x @50Hz: 0.8nm (0.032µin) – @5kHz: 7.5nm (0.296µin) 2.49mm (0.098in) SMA connector CTA Request Info 8100-0004-000 Capacitance Probe: ASP-250M-CTA 250µm (10mil/s) 12.7µm (0.5mil/s) [...]
Accumeasure Probes
High resolution, low cost sensors to measure gap and displacement in industries such as semiconductor, electronics, R&D applications and many more. For grounded targets MTI offers standard capacitance probes. For ungrounded or poorly grounded targets MTI offers push/pull dual sensor probes. Both types of probes are available in stainless steel construction or flat and flexible polyimide construction. Polyimide flat probes are perfect for gap applications or confined spaces. How Probe Sensors Work Standard capacitive sensors require the target to be electrically grounded (for position, gap and vibration measurement applications). Current flows from the probe face to the target and back [...]
Push/Pull capacitance probes
Model Specifications: Push/Pull Capacitance Probes P/N Model Measurement Range Linearity Min. Range Stand-Off Spot Size Interface Type Request Info 8200-2104-420 PP Probe: ASP-250MD-ILA/PP 250µm (10mil/s) 0.02% FSR 25µm (1mil/s) Max. Range Extension: 7x 9.45 mm SMA connectors ILA Request Info 8200-2114-420 PP Probe: ASP-250MD-ILA/PP Ext 250µm (10mil/s) 0.02% FSR 25µm (1mil/s) Max. Range Extension: 8x 11.58 mm SMA connectors ILA Request Info 8200-3104-420 PP Probe: ASP-250MD-ILR/PP 250µm (10mil/s) 0.02% FSR 25µm (1mil/s) Max. Range Extension: 7x 7.11 mm SMA connectors ILR Request Info 8200-2109-420 PP Probe: ASP-350MD-ILA/PP 350µm (14mil/s) 0.02% FSR 35µm (1.4mil/s) Max. Range Extension: 7x 11.58 mm [...]
Brake Rotors
Industry Automotive Applications Brake Rotors Measurement Type Surface Description Under normal operating conditions brake rotors are subjected to extreme temperatures and forces, which can cause rotor distortion and potential failure. To make certain it can withstand these conditions; extensive laboratory testing is performed to optimize design for longevity, short stopping distance, and vibration free operation. Extensive on-vehicle testing is done under real life conditions to test prototype units and engineering designs. Test vehicles are driven for long periods of time while brake performance is monitored by a variety of sensors [...]
GLASS THICKNESS
Industry Consumer Electronics Applications Glass Thickness Measurement Type Thickness Description Did you know that glass thickness can be measured with a capacitance probe? You will need some equipment: Digital Accumeasure D200 ASP-2500-CTA Dielectric probe (The capacitance probe has a sensing area of 11.25 mm) Range extension = 3X, 10Hz filter Introduction: An industrial glass fabricator needed a way to determine the thickness of glass, before cutting it to shape and coating it. The glass sample was marked with indices to find the measuring points. The sample center point -5- thickness was checked [...]
HEIGHT GAP OF INKJET PRINTERS
Industry Consumer Electronics Applications Height Gap Of Inkjet Printers Measurement Type Positioning Description Introduction: Inkjet printers require a certain distance between the inkjet print head and the paper. If the distance is set incorrectly, the printed images get blurry. Current state of the art printers have the print head nozzles built right into the bottom of the ink reservoir (B) as shown below. When the ink cartridge is installed in the printer, the inkjet nozzles (made out of silicon) essentially become a grounded target through the connections shown at [...]
Precision Control in Semiconductor Wafer Lapping
Application Overview Wafer lapping is a critical semiconductor thinning process that demands tight control to avoid over-removal of material, which can lead to costly yield loss. This application note details how MTI Instruments’ Accumeasure™ capacitive sensing technology enabled precise, real-time displacement and thickness measurement during lapping operations, ensuring consistent wafer quality. Challenge During lapping, wafers are thinned from the backside using a rotating abrasive surface. As the process proceeds, precise feedback is essential to monitor how much material is removed and to determine the wafer's final thickness. Traditional mechanical methods or visual inspections are not sensitive or fast enough [...]
NUCLEAR HEAT EXCHANGER VIBRATION
Power plants, particularly nuclear power plants, require heat exchangers to cool down the primary working fluid for the power plant. Excessive vibration can lead to cracking and premature failure of the heat exchanger. Problem: A major power plant company approached MTI looking for a sensor that could measure vibration of a heat exchanger assembly that was immersed under water. Additionally, the water could reach 250 F and up to 220 PSI; the probe had to be sealed with a gland at a bulkhead feed through area. Solution: MTI developed a special fiber optic probe based on the MTI-2125H probe configuration. The [...]