Michell Instruments Ltd. - PRODUCT NEWS


Michell’s S8000 Integrale gives drift-free dew-point measurements in vacuum

The S8000 Integrale cooled mirror hygrometer provides highly reliable, drift-free dew-point measurements in vacuums as low as 0.05 mbar, making it unique in its category. It is ideal for applications, such as oil refilling of transformers, which involve vacuum pumping.

Many high voltage transformers, especially those switching many thousands of kVA (such as the types found in power plant sub-stations), are filled completely with a refined mineral oil. This serves several purposes; most importantly the oil must act as a main part of the transformer’s insulation, though it also serves to cool the transformer.

Moisture inside transformers adversely affects the dielectric and insulating properties of the oil. Vacuum pumping the transformer enclosure is a common practice in the industry, with the sole purpose of minimizing the total moisture content prior to oil filling.

Optimal dryness is desirable at this critical stage and a reliable, accurate dew point measurement enables users to monitor the process and ensure that moisture is eliminated as much as possible. Together with its low-pressure capability, the S8000 can measure dew-points as low as -60°C with 0.1°C accuracy. Its fundamental chilled-mirror technology is drift-free so measurements are reliable over time. The design of the sensor head allows for excellent sealing both in high-pressure as well as in low pressure and vacuum applications, making it a highly versatile instrument.

About Michell Instruments
Michell Instruments is the international leader in the field of moisture and humidity measurement solutions. With over 30 years experience, Michell designs and manufactures a wide range of transmitters, instruments and system solutions capable of measuring trace moisture, humidity and dew point in a vast range of applications and industries ranging from compressed air, power generation, process, oil and gas, pharmaceutical and many more. With a fast growing international subsidiary and distribution network, Michell provides solutions in moisture and humidity to the most demanding customers across the globe.

About Rense Instruments
Rense Instruments is an industry leader in the development and production of humidity and temperature measuring sensors, humidity portable and laboratory instruments and calibration transfer standards. Rense Instruments was acquired by Michell in January 2006 and completes Michell Instruments product range in humidity solutions. Rense instruments expertise spans over three decades focusing on serving customers with solutions for HVAC, energy management, storage and many other general industry and OEM applications.

Michell Instruments Limited
48 Lancaster Way Business Park,
Ely, Cambridgeshire CB6 3NW. UK
Tel: +44(0) 1353 658031 Fax: +44(0) 1353 658199
website: www.michell-instruments.co.uk

January 2010

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