Wiratama Mitra Abadi - Bekasi, Indonesia

Seametrics Inc. is a designer and manufacturer of a wide variety of flow metering products. Since 1990 the company has provided innovative solutions to users in industrial water treatment, energy management, irrigation, utilities, transportation, and chemical handling. Seametrics products have a reputation for durability and accuracy at a competitive price, and are sold largely through a network of domestic and international distributors.

Seametrics flow measurements is committed to providing a broad range of flow metering products for the Industrial/Municipal and Irrigation industries in addition to a variety of OEM applications. We maintain an attitude of responsiveness to the many flow metering needs encompassed within these industries and are vigilant in our efforts at developing new flow meter products and enhancing our existing products to better serve our customers.

VSE Volumentechnik GmbH develops and manufactures highly-precise flow measuring devices for almost all pumpable media as well as electronic evaluation devices. The company's inhouse development and design department comes up with technically exceptional solutions tailored to the client's individual requirements. Thus, customer specific flow sensors with highest accuracy can be designed within shortest development times. VSE, headquartered in the German town of Neuenrade, was founded in 1989 and belongs to the Echterhage Group.

Tek-Air has provided laboratory airflow control systems since our incorporation in 1983. The experience gained through the completion of hundreds of installations, for a wide variety of customers, is reflected in our design philosophy. Our design for each project is intended to embody the following key elements of this philosophy.

Be it airflow, space pressure, or face velocity; if a parameter is important enough to be controlled, it should be measured directly. Most competitors of fume hood controls measure sash open area only and then position a calibrated mechanical volume regulator (springs, bearings, and levers) to achieve volumetric flow control.

Tek-Air has designed fume hood controls for many specialized Hood applications using three different methods of control.

> Control based on the Velocity Measurement of the air drawn from the room through the open sash over our velocity sensor. Virtually any occurrence which affects the face velocity is detected by the sensor, even those which are caused by improper use of the hood. This measured face velocity is used as the parameter for the controller to change the flow in the duct to maintain face velocity set point.