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.