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Sigma Hellas Ltd contact information

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Working Hours

Mon - Fri: 08:00 - 16:00 (EET)
Sat: Closed
Sun: Closed

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The Trouble with Cabling

Cabling tends to anchor equipment to fixed locations, thus reducing flexibility in equipment placement and reorganization. Cabling can also be very expensive to install and maintain in terms of both material and labour costs. New runs, moves, or upgrades easily disrupt operations while cable is accommodated, and re-positioning or upgrading equipment can necessitate completely new runs. Moreover, as the distance between equipment and control or monitoring devices increases, cable run length maximums are quickly exceeded.

Wireless data communication via radio modem provides a means of maintaining communication with for example:

  • Remote units
  • Measuring stations
  • External buildings and unmanned installations
  • Temporary or mobile sites
  • Devices for gathering of test readings, controlling or regulating equipment or recording various kinds of alarms.

The advantages with radio communication compared with traditional data communication through cable are:

No cost for cable or calls on the license free channels Mobile applications Back-up system for cable installations.

We offer telemetry solutions as well as radio data modems with optional powerful telemetry functionality

An extensive selection of standard single and multi-channel units are available.The units are typically used with flow, pressure, level, differential pressure,temperature, position, and vibration sensors. Applications include any situation where cabling is too expensive or impractical, such as valve and motor operations, public utility operations,utility management systems, offshore installations, and alarm and security operations. There is a wide choice of inputs and outputs, including 4-20ma, 0-20ma, 0-1v, 0-5v, 0-10v, open drain, and relay switch contacts. Transmission may be continuous, at predetermined intervals, or on change of input state. Units are powered from either 110/240 vac or battery supply. Most units feature a low battery warning. Antenna types are specified on a case by case basis depending on range and terrain factors. Various housings and enclosures are available depending on location and environmental conditions.

  • Single Channel Systems
  • Two Channel Analogue/Digital Systems
  • Multi-channel Systems
  • Wireless link for sensors
  • Radio Modem Wireless link for 4-20mA signals
  • Antennas and surge arresters
  • Wireless networks
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