SOURCE: Epson Toyocom Corp.

June 25, 2009 08:00 ET

U.S.-Based Epson Toyocom Timing Products Division Announces New High-Precision Quartz-Based Pressure Sensors

Unique Architecture Enables the XP-7000 Series to Directly Measure Fluid Pressure

EL SEGUNDO, CA--(Marketwire - June 25, 2009) - Epson Toyocom Corporation's U.S.-based Timing Products Division today announced the development of a new series of high-precision quartz pressure sensors. The sensors in the new XP-7000 series feature an architecture that allows fluid pressure to be directly transmitted to a pressure-sensing element. Sample units and pricing will be available this September.

Most pressure sensors used for high-precision measurements contain a pressure-transmitting medium such as oil. The XP-7000 series, however, uses a frequency-stable QMEMS(*1) tuning-fork crystal unit(*2) as a pressure-sensing element and Epson Toyocom's unique pressure-transmitting architecture to directly read pressure to an accuracy of +/- 0.05 %FS.

In direct response to today's environmental concerns, Epson Toyocom designed the sensors in the XP-7000 series as eco-considerate products that do not release oil or gas. In addition, the unique architecture employed by Epson Toyocom enable the company to reduce the cubic volume of the new sensors by more than 40% compared to their predecessors.

Leveraging these characteristics, the new sensors are ideally suited to applications such as precisely and accurately measuring the water level of rivers and sewers, fluid pressure levels in environments with stringent cleanliness requirements, and pressures in industrial plant equipment.

The two models in the XP-7000 series are the XP-7000MB and the XP-7001MB. The XP-7000MB is equipped with a buffer circuit to maintain output levels even with long cables. The XP-7001MB supports low current.

Main Features

(1) Pressure reading accuracy of +/- 0.05 %FS

(2) Clean environmental performance, with no release of oil or gas

(3) Small size (22 mm diameter x 40 mm length; 43% smaller than predecessors)

Main Specifications

Item                 Specification                  Note
Pressure          0 to 100 kPa         Water level: 0 to 10 m
measurement range (gauge pressure)
Pressure reading  +/- 0.05 %FS         After pressure value conversion
accuracy                               (including linearity, hysteresis,
                                       and repeatability)
Temperature       +/- 0.05 %FS         After compensation processing by a
characteristics                        built-in temperature sensor
Operating         -10ºC to +50ºC
temperature range
Output voltage    +12 V DC
Supply voltage    8 mA Typ.            XP-7000MB (with buffer circuitry)
                  1 mA Typ.            XP-7001MB (without buffer circuitry)
External          dia. 22 mm x 40 mm   Excluding the protruding portion of
dimensions                             the base
Material          316L stainless steel Pressure sensing unit


(*1) QMEMS (Quartz Micro Electro Mechanical System) was coined by combining "Quartz" with "MEMS." QMEMS are fabricated on quartz, a crystalline material that has excellent stability and accuracy. Microfabrication processes such as photolithography, etching, metallization, sacrificial layers removal, etc. are used to produce extremely small crystal devices that still provide excellent performance. QMEMS is a registered trademark of Epson Toyocom.

(*2) Double-ended tuning fork crystal unit. This uses the flexure vibration of two combined tuning fork type crystal units. It features a high Q (resonance sharpness) value, excellent stability, high precision, and fast responsiveness.

About Epson Toyocom

Epson Toyocom Corporation is the global leader in crystal devices, which serve as the heart and pulse for a wide range of electronic products for consumers and industry. Utilizing its innovative hybrid quartz microfabrication technology, QMEMS, Epson Toyocom offers technological expertise in timing, sensing, and optical devices, and maintains its leadership position by providing customer-specific combinations and solutions.

About Epson Electronics America, Inc.

The Timing Products Business Unit of Epson Electronics America, Inc. (EEA) is the North American sales, marketing, and engineering arm of Epson Toyocom Corporation (Epson Toyocom) and provides a wide array of crystals, oscillators, real-time clock modules, SAW products, optical devices and gyro and pressure sensors. Based in El Segundo, California, the EEA group has more than 40 sales representative offices nationwide and a growing network of exclusive distributors. For more information, please visit and click on the Epson Toyocom center box. Both Epson Toyocom and EEA are part of the Seiko Epson Group, which consists of 108 companies around the world.

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