Electricity and Control September 2020

MEASUREMENT + INSTRUMENTATION : PRODUCTS + SERVICES

New level sensors in radar instruments

bulk solids. They are available in a compact version with cable connection housing, and a standard version with a fixed IP68 cable connection. The radar sensors maintain steady, accurate measurements without effect or loss of echo from external influences such as solar gain, air temperature fluctuations or weather conditions causing vapours, or condensation. Users can choose from 4 ... 20 mA, HART, SDI-12 or Modbus as the direct output sig- nal. ATEX versions are also available. The VEGAPULS series of instruments can be complemented by the optional VEGAMET controllers. The controllers feature a large graphic display which can be used to visualise all measured values. They have also been designed to meet the special requirements of the water/wastewater industry. VEGAMET controllers allow simple implementation of pump control, flow measurement in open channels and overfill protection according to WHG. They are designed for operation in outdoor environments and are supplied in a weather- resistant housing. Simple setup and wireless operation The sensors and the controllers can be operated easily via Bluetooth with a smartphone or tablet. This makes setup, display and diagnostics easier, especially in harsh environments or hazardous areas.

A few years ago, when VEGA introduced the VEGAPULS sensors based on 80 GHz technology, it began a new era in radar level measurement. With the more precise focusing of the radar beam, the sensor virtually elimi- nates any unwanted or interfering reflections – making level measurement much easier and more reliable. Many difficult measuring tasks for ultrasonic sensors are be- coming standard practice with radar technology. VEGA has now added a new compact 80 GHz instru- ment series to its portfolio of radar sensors. It is especial- ly suitable for price-sensitive applications, such as those found in the water/wastewater industry and in auxiliary process loops in process automation. VEGA designed a new radar microchip especially for this purpose – it is characterised by its very small size, fast start-up time and low energy consumption. This makes for a particu- larly compact and versatile radar sensor.

Robust and weatherproof The new VEGAPULS instruments are suitable for use with both liquids and

The new VEGAPULS series of radar instru- ments offer a number of advantages compared to current ultrasonic level measurement tech- nologies. Due to their better all-conditions re- liability, ruggedness, simple operation and low price, they offer a preferred choice for water industry applications.

For more information contact VEGA Controls SA. Tel: +27 (0)11 795 3249, email: info.za@vega.com Visit: www.vega.com

The VEGAPULS instrument series is available in a compact version with cable connection housing (left) and a standard version with fixed cable connection (IP68), with the VEGAMET controller (right).

New check valve with redundant sealing

Its sealing system with a self-centring piston reliably pre- vents backflow of liquid and gaseous media. The reliability of the new instrumentation valve is main- ly due to its redundant sealing, consisting of an O-ring and a metal cone. Its leak tightness has been tested in accordance with BS6755/ISO 5208 leakage rate A. The solid-machined, robust design of the model CV en- sures high repeatability and a long service life, even in heavy-duty applications. The pressurised parts corre- spond to the safety factor of 4:1. For the new check valve, WIKA offers an applica- tion-specific assembly with a measuring instrument. Such instrument hook-ups are delivered ready-to-install and leak tested. For more information contact WIKA Instruments. Tel: +27 (0)11 621 0000, email: sales.za@wika.com Visit: www.wika.co.za

The new model CV check valve from WIKA is designed for a wide range of applications in the process industry.

The CV check valve is designed to suit wide ranging applications in the process industry.

20 Electricity + Control SEPTEMBER 2020