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Accumeasure Series
Technology-driven measurement solutions for high resolution gap applications.
The Accumeasure product line offers affordable, precise measurement solutions for a wide range of environmental conditions and configurations.
The Accumeasure product line features capacitive sensor products for high resolution gap and displacement measurements that require a high level of accuracy that is both stable and repeatable. A capacitive sensing system consists of a probe and amplifier. Capacitive measurements can be performed in a multitude of environments using non-contact passive capacitance probes that are not affected by magnet fields, temperature, humidity, nuclear radiation, and pressure. This is largely due to the nature of the rugged and passive capacitance probes.
Extremely high-precision and high linearity amplifiers make these systems ideal for critical measurements in X-Y stages, rotating spindles, shaft position, armature gap, disk position, and piezo electric positioning applications. MTI engineering guarantees a highly stable, accurate and low noise amplifier design with an attention to fast response time.
Thousands of MTI’s products are used globally in the semiconductor, automotive, aviation, electronics, and medical industries. As the leader in capacitance technology with decades of experience, MTI stands behind the quality and performance of the most demanding user environments.
Product Comparison
| Feature | Accumeasure HD | Accumeasure D | Accumeasure MicroCap | Accumeasure AS-56X | Accumeasure Wireless |
|---|---|---|---|---|---|
| Resolution | pm | nm | nm | μm/nm | μm |
| Linearity (% FSR) | ±0.01 | ±0.01 | ±0.02 | ±0.02 | ±0.3 |
| Output | Digital | Digital/Analog | Analog | Analog | Digital |
| Bandwidth (Hz) | 5,000 Hz | 5,000 Hz | 5,000 Hz | 5,000 Hz | 1.5 Hz |
In Process or Desktop Solutions
A system consists of a capacitance amplifier packaged in an enclosure ideal for lab or in-process systems and a capacitance probe or probes as several of MTI’s solutions incorporate multiple channels.
PCB OEM Boards for Embedded Applications
A system consists of a printed circuit board (PCB) capacitance amplifier, probe and coax cable. The customer provides the enclosure and power supply. MTI provides the connector interface. Probes require a MCX connector or BNC depending on the amplifier chosen.
Probes and Probe Systems
Probes need to be mated with a capacitance amplifier. Some probes have integral leads, others require selecting a coaxial cable assembly. MTI works with OEM clients to make custom probes meeting specific application needs.
Technology Principles
MTI capacitance measurement system is based on the principle of parallel plate capacitor measurement. The electrical capacitance formed between a capacitance probe and a target surface varies as a function of the distance (gap) between these two surfaces. Capacitance-based measurement probes have long been employed as a means of non-contact measurement of electrically conductive materials. In a typical system, MTI’s capacitance probe acts as one of the plates and the grounded target the other plate. MTI’s amplifier converts the gap’s capacitance into an output voltage proportional to the gap. Capacitive measurements are very stable rivaling interferometer accuracy. The Capacitance sensors are not adversely affected by temperature, humidity and pressure.
A Closer Look at Some of Our Accumeasure Series Products
The Accumeasure Series is engineered to deliver accurate, reliable, and efficient measurements, ensuring unparalleled performance across various industrial applications. We provide fantastic products, and our Accumeasure Series products are representative of MTI Instrument’s ability to deliver products that lead the way in numerous operations. Take a closer look below.
Accumeasure HD
Our Accumeasure HD is a high-precision, two-channel capacitance-based displacement measurement instrument designed for conductive targets. This advanced tool offers picometer-scale resolution through external preamplifiers that effectively eliminate parasitic capacitance effects.
The Accumeasure HD provides a measurement range of 0 to 2mm and boasts an impressively low noise level of ≤ 0.0000001 √(Hz) FSR. With a digital resolution of 1 pm, it ensures precise measurements every time. Further enhancing its accuracy is the long-term stability of 20ppm/month or better at 20°C and a digital linearity accuracy of ±0.01% FSR.
Equipped with digital communication capabilities via Ethernet or USB, this instrument offers programmable bandwidth and range extension capabilities, making it a versatile tool for various applications. Its digital frequency response reaches up to 5kHz.
Accumeasure Digital Capacitance System D Series Gen 3
MTI Instruments is proud to introduce the Accumeasure Digital Capacitance System D Series Gen 3, a high-precision capacitance displacement sensor designed for industrial and research applications. This innovative system directly converts capacitive electric field measurements into a 24-bit digital reading, ensuring accurate determination of position, thickness, motion, and vibration.
The D Series Gen 3 stands out for its ability to eliminate common errors found in analog amplifiers. Through advanced technology, it bypasses issues related to analog filtering and linearization, promising nanometer accuracy and stability. These features make it an ideal choice for industries requiring high precision, including the semiconductor, electronics, and R&D sectors.
Accumeasure Analog Capacitance System
The Accumeasure Analog Capacitance System is an ultra-high-precision, capacitance-based measurement tool. This instrument is recognized for its nanometer-level resolution, making it ideal for a variety of metrology tasks.
Compact and lightweight, this system is easy to set up and operate. It is designed to measure various parameters, including stage position, metal thickness, semiconductor wafer thickness, and rotating shaft runout. Its high precision makes it a valuable tool in industries where accuracy is very important. For those seeking an accurate, versatile, and user-friendly measurement tool, the Accumeasure Analog Capacitance System is a top contender.
Accumeasure AS-500 Modular Capacitance Rack System
The AS-500 is engineered for high-resolution and accurate measurements of position, thickness, dynamic motion, vibration, and runout of conductive and semiconducting materials. Its use extends to in-vehicle testing scenarios such as brake rotor assessment, axle runout evaluation, and thermal expansion testing.
The system includes the advanced AS-562 and AS-563 capacitance probe amplifiers. The AS-562 is designed to work with push/pull probes for measuring ungrounded targets, while the AS-563 specializes in measuring the position of grounded targets. With its modular design, the AS-500 allows for customization according to the desired number of measurement channels, catering to all our customer requirements.
Accumeasure OEM Boards
MTI’s Accumeasure OEM Boards are your solution to high-precision non-contact displacement, thickness, and gap measurement. These compact capacitance boards are custom-designed with micro-positioning, thermal correction, focusing, and closed-loop control.
Our Accumeasure OEM Boards stand out for their sub-nanometer resolution, extreme stability, exceptional repeatability, and rapid response time. These features make them a top choice for Original Equipment Manufacturers (OEMs) seeking tailored measurement solutions. These boards also incorporate MTI Instrument’s latest capacitance amplifier design, leveraging over 60 years of product line history.
Get Your Accumeasure Capacitance Sensors Today From MTI
Our Accumeasure Capacitance Sensors represent the pinnacle of precision, reliability, and efficiency in measurement technology. We invite you to explore these innovative solutions, each designed to meet diverse application needs and deliver the performance your industry is looking for. For exceptional quality and trusted expertise, look no further than MTI Instruments.