German MICRO MATIC sensors, MICRO MATIC models, MICRO MATIC prices

MICRO MATIC pressure sensors for level measurement. Submersible static pressure level transmitters (level gauges) operate on the principle that the static pressure of the measured liquid is proportional to its height. They use advanced imported isolated diffused silicon sensitive elements or ceramic capacitive pressure sensors to convert static pressure into electrical signals. After temperature compensation and linear correction, these are converted into standard electrical signals (typically 4–20mA/15VDC).

MICRO MATIC sensor structure

It consists of a scale grating and a grating readhead. The figure on the right shows the structure of a grating ruler. The key component of the grating detection device is the grating readhead, which comprises a light source, condensing lens, index grating, photoelectric elements, and adjustment mechanisms. There are many structural forms of grating readheads, classified by their structural characteristics and application scenarios into direct-receiving readheads (also known as silicon photovoltaic cell readheads, mirror-image readheads, beam-splitter readheads, and metal grating reflective readheads).

MICRO MATIC sensor principle

The essence of a grating displacement sensor is measuring position using the grating pitch as a standard scale. High-resolution grating rulers are generally expensive and difficult to manufacture. To improve system resolution, Moiré fringes must be subdivided; grating ruler sensor systems mostly employ electronic subdivision methods. When two gratings overlap with a slight inclination, Moiré fringes are generated in a direction roughly perpendicular to the grating lines. As the grating moves, the Moiré fringes move up and down accordingly. This converts the measurement of grating pitch into the measurement of the number of Moiré fringes. Within one Moiré fringe width, placing 4 photoelectric devices at specific intervals enables electronic subdivision and direction determination. For example, for a grating ruler with 50 line pairs/mm, the grating pitch is 0.02mm. With four-fold subdivision, counting pulses with a resolution of 5μm can be obtained, achieving high precision for general industrial measurement and control. Since displacement is a vector, both magnitude and direction must be detected, requiring at least two photoelectric signals with different phases. To eliminate common-mode interference, DC components, and even harmonics, differential amplifiers composed of low-drift operational amplifiers are typically used. The 4 photoelectric signals obtained from 4 photosensitive devices are sent to the input terminals of 2 differential amplifiers. The two signals output from the differential amplifiers have a phase difference of π/2. To obtain direction determination and counting pulses, these two signals must be shaped, first into square waves with a duty cycle of 1:1. Then, by comparing the phases of the square waves, the movement direction of the grating ruler can be determined. By counting the square wave pulses, the displacement and velocity of the grating ruler can be obtained.

MICRO MATIC sensor usage precautions

When plugging and unplugging the connector of the linear encoder sensor and the digital readout unit, ensure the power is turned off. Install an external protective cover whenever possible, and promptly remove chips and oil that splash onto the scale to strictly prevent any foreign matter from entering the housing of the linear encoder sensor. Regularly check whether the mounting and connection screws are loose. To extend the service life of the dust-proof sealing strip, apply a thin, even layer of silicone oil to the strip, taking care not to let it splash onto the glass grating etched surface. To ensure the reliability of the linear encoder sensor, clean and wipe the linear encoder scale surface and the index grating surface at regular intervals with an ethanol mixture (50%) to keep the glass linear encoder scale surface clean. The linear encoder sensor must not be subjected to severe vibration or impact, as this may damage the linear encoder scale; if the scale fractures, the linear encoder sensor will fail. Do not disassemble the linear encoder sensor yourself, and never arbitrarily change the relative spacing between the main scale and the secondary scale. Doing so may compromise the accuracy of the linear encoder sensor and cause relative friction between the main and secondary scales, damaging the chrome layer and thus the grating lines, which renders the linear encoder scale unusable. Take care to prevent oil stains and water from contaminating the linear encoder scale surface, as this can disrupt the distribution of the grating lines and cause measurement errors. Avoid operating the linear encoder sensor in environments with severe corrosive effects, to prevent corrosion of the grating chrome layer and the linear encoder scale surface, which would degrade the quality of the linear encoder scale.

Weidou Intelligent Technology specializes in selling German MICRO MATIC sensors, MICRO MATIC proximity sensors, MICRO MATIC distance sensors, MICRO MATIC vision sensors, MICRO MATIC displacement sensors, MICRO MATIC load cells, MICRO MATIC speed sensors, MICRO MATIC photoelectric sensors, MICRO MATIC position sensors, MICRO MATIC angle sensors, MICRO MATIC tactile sensors, MICRO MATIC temperature sensors, MICRO MATIC pressure sensors, MICRO MATIC flow sensors, MICRO MATIC level sensors, MICRO MATIC motion sensors, and MICRO MATIC process sensors. Original imports from Germany. Inquiries and orders are welcome.