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The International Safety Standard IEC61010


This Safety Standard which is established for protecting operators and environment stipulates safety requirements for measuring instruments and electric equipment. The IEC standard defines the degree of pollution, measurement classification, barrier, material, spatial distance and creepage distance to assure safety. The impulse withstand voltage as transitional energy is estimated from the measurement category and main power supply voltage to conduct tests for measuring instruments.

Test voltage (impulse withstand voltage)
Nominal AC or DC line of main power
supply and neutral voltage
CAT.II CAT.III CAT.IV
300V 2500V 4000V 6000V
600V 4000V 6000V 8000V
1000V 6000V 8000V 12000V
The output impedance of an impulse generator is 12Ω in the measurement category II, and 2Ω in measurement categories III and IV.
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Environmental Management System

We implemented activities aimed at acquiring certification under the ISO 14001 standard for environmental management systems, and were granted the certification by the Japan Quality Assurance Association in November 2007. We involve all employees in environmentally balanced....More

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We involve all employees in environmentally balanced activities throughout every stage of the process of delivering products and services to customers in order to achieve sound environmental management as a community and customer-oriented company. (Established on April 2nd, 2007).....More

Imitation Warning

SANWA is a registered trademark of SANWA ELECTRIC INSTRUMENT CO. LTD., JAPAN. Lately, there have been reports that SANWA products have been imitated and such imitations have the trademark "SANWA", which is similar in style, appearance same pronunciation...More

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Measurements only become meaningful when there is confidence in the accuracy and the quality of the instruments being used.Sanwa has developed countless measuring instruments since its founding in 1941 and, in doing so, has delivered countless solutions to customer needs.....More

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