Showing posts with label industrial. Show all posts
Showing posts with label industrial. Show all posts

Monday, May 15, 2017

Wireless Communications in Industrial Process Control

symbolic wireless communications or transmission tower antenna
Industrial wireless communications for process control
Electrical cables, for many years, were the only option for connecting measurement devices with their companion control and monitoring gear. While wired connections are still in widespread use, probably still the predominant connection method, wireless communication technology offers a range of advantages in connecting process measurement instruments and their controls.

Bandwidth, in wireless communication and modem data transmission terminology, is the analog range of the radio spectrum’s frequencies, or wavelengths, used to transmit a signal between transmitter and receiver. Jurisdictional agencies throughout the world regulate the use of bandwidth and assign ranges for use by public and private organizations.

Before there can be an appreciation of radio transmissions, there first must be an understanding on the transmission medium. Radio transmissions run on the UHF radio spectrum, or the Ultra high frequency spectrum, named by the International Telecommunication Union; the spectrum runs from 300 megahertz (MHz) to 3 gigahertz (GHz).

There are two prominent frequencies utilized for industrial wireless communications in the US: 900 MHz and 2.4 GHz. Within the allocated bandwidth, there are numerous individual channels that can be used for applications.

Each of the available bandwidths has its own transmission characteristics which may make it advantageous for a particular application. Amateur radio stations operate in the 900 MHz range because attenuation of the transmission signal is less than at higher frequencies. Higher frequencies have greater theoretical transmission range, but can be impaired by smaller sized objects in the transmission path because of their shorter wavelength.

Due to a number of practical application factors, 2.4 GHz technology is predominate in consumer and many industrial applications; one of the main reasons is the sheer amount of concurrent signals in the designated bandwidth. The 2.4 GHz band can accommodate more concurrent users or devices. Both frequency ranges have useful application in automation and process control, enabling effective connections between devices over distances from several feet to thousands of miles.

Wednesday, June 1, 2016

Pressure and Temperature Switches for Demanding Industrial Applications

industrial temperature switch for hazardous location
Industrial Temperature Switch
for Hazardous Location
Courtesy CCS
Industrial process control applications, by their very scale and nature in financial, operational, and safety terms, call for rugged and well performing devices and equipment. In the area of temperature and pressure related control, switches are often employed to achieve or respond to an enormous range of possible conditions.

Temperature and pressure switch reliability is especially critical in applications located within hazardous zones or locations. Custom Control Sensors (CCS) manufactures pressure and temperature switches for the most demanding applications in hazardous environments.

Products are designed to provide high cycle life through the use of a Belleville spring to reduce mechanical wear on the switch element. The switches have no moving parts, other than the actuating mechanism which has a limited movement of 0.01 inch.


CCS products for hazardous locations are routine deployed on

  • Oil Platforms
  • Pump Control
  • Refineries
  • Control and Annunciator Panels
  • Relay Alarm Systems
  • Pipelines
  • Gas/Steam Turbines
  • Oil Filtration

Included below is a short form catalog illustrating the CCS line of pressure and temperature switches for hazardous and non-hazardous locations. In addition to the suitability of the industrial switches for use in hazardous areas, CCS temperature and pressure switches exhibit these main features:

  • High Cycle Life
  • Wide Range of Set Points
  • Protection Against Environment
  • High Over-Pressure Capability
  • No calibration needed
  • Maintenance free
  • High vibration resistance
Consider your temperature and pressure related applications and share your challenges with a product application specialist for the best solutions.