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In cipher converter coded the following parameters:

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Ltd. "SKTB ELPA" designed and engineered sensors for measuring pressure of various fluids: fresh and salt water, oil and its derivatives products, food products (milk, paste).

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To visualize the characteristics of the output signal converters PTC; MPC and PDTK:

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Manometric feature of quartz resonators is the reproducibility of temperature-frequency characteristic (PMx), which must be compensated with high accuracy over a wide temperature range and in the range of operating pressures. You must take into account the change in the temperature sensitivity of the cavity of the pressure acting on it. The following describes two methods of temperature compensation.

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 In Fig. 2 is a graph of the test results quartz pressure transducer with mathematical temperature compensated readings of temperature-sensitive resonator, which is located in the transmitter housing. The test was conducted in the Company "SKTB ELPA" December 12, 2007.

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 Public safety and preservation of complex industrial infrastructure along the coast and the ocean shelf, as well as reducing the risk of adverse impacts on the marine environment in emergency situations on offshore oil platforms, closely related to the study of nonlinear dynamics of waves in the coastal zone. The experimental data are thus of great value in relation to the increasing demands for precision estimates of mean and extreme values of various parameters of hydro and the need for verification and refinement of mathematical models of wave processes. A collaboration of research teams of "Applied Mathematics" Nizhny Novgorod State Technical University (NSTU) and the Laboratory of wave dynamics and coastal currents of the Institute of Marine Geology and Geophysics (IMGG), Far East Branch, subject to many years of experience studying the nonlinear wave dynamics and conduct field experiments in the Pacific [1 - 5, 7 - 12, 14 - 17], it was decided to conduct a joint experiment, the purpose of which relate to the study of wave dynamics of the shelf area in general and, in particular, marine hazards on the shelf, the analysis of low-frequency (with periods ranging from minutes to hours ) sea-level fluctuations, registration processes due to topographical capture wave energy. In addition, the full-scale data obtained will be used for development and testing of a deterministic forecast model of nonlinear boundary waves.

Пьезоэлектрические кварцевые резонаторы и их применение в датчиках

 Пьезоэлектрический резонатор представляет собой электромеханическую систему, в которой используется явление прямого и обратного пьезоэффекта, которая обычно выполнена в виде двухполюсника, объединяющего системы электрического возбуждения механических колебаний и съема электрического сигнала, пропорционально их амплитуде. В виду целого ряда свойств одним из самых распространенных пьезоэлектриков, применяемых в пьезоэлектрических резонаторах, является пьезокварц. Кварцевые резонаторы имеют высокую добротность 10⁷ и более, кратковременную и долговременную стабильность 10^-4 до 10^-7 , практически отсутствует гистерезис при механических, температурных и электрических воздействиях.

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Quartz crystals are widely used in today's electronic equipment, generators and stable frequency filters. But quartz relevant sections and structures are also used to measure various physical parameters such as temperature, pressure, humidity, acceleration. [1,2] For example, pressure sensors. In precision barometer, a precise gauge of absolute pressure in downhole pressure sensors from companies such as Druck (UK), Quartzdyne (USA), Spartek Systems (Canada), Schlumberger (France), Ltd. "SKTB ELPA" (Russia) apply piezoresonance sensors (PCHE).

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• A little over ten years ago, in the market of load cells used in electronic scales, a new type - quartz piezoresonance load cell (the quartz load cell). Prior to that time in the art, of course, dominated by two types of sensors - vibrochastotny and tensoresistance.
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• Quartz load cells is the product of a new dynamic technology which in ten years has convincingly proved its competitiveness. The involvement of a growing number of businesses involved in the production, operation and maintenance of the devices using quartz load cells, leading to the popularization of this type by an adequate assessment of their benefits. The same process stimulates further work on improving the technology and products made ​​with it.
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