German Tecsis sensors, Tecsis models, Tecsis prices

Tecsis 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 isolated diffused silicon sensing elements or ceramic capacitive pressure sensors to convert static pressure into electrical signals, which are then temperature-compensated and linearized into standard electrical signals (typically 4–20mA/15VDC).

Tecsis sensor structure

It consists of a scale grating and a grating readhead. The figure on the right shows the structure of the grating scale. 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).

Tecsis sensor principle

The essence of grating displacement sensors is to measure position using the grating pitch as a standard ruler. High-resolution grating scales are generally expensive and difficult to manufacture. To improve system resolution, Moiré fringes must be subdivided; grating scale sensor systems mostly employ electronic subdivision methods. When two gratings overlap at a slight angle, 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 counting 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 scale with 50 line pairs per 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 signal paths obtained from 4 photosensitive devices are fed into the inputs of 2 differential amplifiers. The two output signals 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 scale can be determined. By counting the square wave pulses, the displacement and velocity of the grating scale can be obtained.

Tecsis sensor usage precautions

Power off before plugging or unplugging the connectors of the linear encoder sensor and the digital readout. Install an external protective cover whenever possible, promptly remove chips and oil splashed onto the scale, and 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 sealing strip; take care not to let it splash onto the glass grating etched surface. To ensure reliable operation of the linear encoder sensor, periodically clean and wipe the linear encoder scale surface and the index grating surface 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 linear encoder scale breaks, 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; otherwise, you may compromise the accuracy of the linear encoder sensor and cause relative friction between the main scale and the secondary scale, damaging the chrome layer and thus the grating lines, which will render 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 chrome layer on the grating and the surface of the linear encoder scale, which would degrade the quality of the linear encoder scale.

Weidou Intelligent Technology specializes in selling German Tecsis sensors, Tecsis proximity sensors, Tecsis distance sensors, Tecsis vision sensors, Tecsis displacement sensors, Tecsis torque sensors, Tecsis speed sensors, Tecsis photoelectric sensors, Tecsis position sensors, Tecsis angle sensors, Tecsis tactile sensors, Tecsis temperature sensors, Tecsis pressure sensors, Tecsis flow sensors, Tecsis level sensors, Tecsis motion sensors, and Tecsis process sensors. All products are original imports from Germany. Customers are welcome to inquire and order.