Press Release

Deeter Electronics adds “Router” to Extend Range of Industrial Wireless Sensor System

 

Enables high reliability wireless mesh operation

2.4 GHz Frequency band High Power Radio Transceiver

 

July 2010Deeter Electronics, a market leading international company in the design, development and manufacture of electronic sensors and control systems, announces the introduction of a Wireless Router to increase the range and reliability of their recently launched Deeter Wireless Sensor System for industrial measurement and control.

 

The new Wireless Router may be added to a Deeter Wireless Sensor System to significantly increase the range of the wireless communication between sensors and a Base Station. Deeter Wireless Routers may also be used to improve communications reliability.

 

A basic Deeter Wireless Sensor System is comprised of a Base Station and a remote sensor node, either a general purpose Deeter Sender or self contained Liquid Vertical Continuous Sensor (LVCS-RF) probe. The maximum range between these, in ideal conditions, can exceed 1Km. However in many industrial environments the signal will be attenuated by obstructions and fading may result from multiple signal paths caused by reflections. These effects reduce the quality of the communications link and the achievable range. Adding a Deeter Wireless Router to the system extends the effective range and improves signal quality.

 

In use the Wireless Router should be positioned midway between the remote probe or sender and Base Station, possibly offset in order to avoid obstructions that might cause interference. Up to four Routers may be used in a single system with data being retransmitted a number of times before reaching the Base Station. This will greatly extend the transmission range and reliability.

 

The use of multiple Routers allows the wireless network to automatically establish the most effective signal route between probe and Base Station at turn-on. Should this signal path become interrupted for any reason the Router network will re-establish the most efficient and reliable signal path. In this mode the Routers are operating as a self-healing wireless mesh network offering maximum signal reliability.

 

The Deeter Wireless Router must be permanently powered-up to relay messages. Any message sent from a base station to a “sleeping” battery powered remote node or sensor will wait at the last Router until the sensor wakes up and polls for data.

 

The Deeter Wireless Sensor system uses the internationally recognised IEEE 802.15.4 protocol in the 2.4GHz ISM radio band allowing users to install approved devices with no licensing requirements. It operates on one of 16 radio frequency channels available allowing several wireless sensor networks to share the same wireless spectrum without interference.

 

The Deeter Wireless Router is housed in an ABS enclosure with an external antenna. Power is provided by an external 5VDC mains wall mounted adapter connected via cable glands. An optional 3m extension lead and bracket are available for mounting the antenna in a position more favourable to wireless communication should the need arise.

 

Peter Whiteaker, Managing Director of Deeter Electronics, comments; ”Our new Wireless Router is the final piece in our class leading wireless sensor system. Adding one or a number of Routers to a measurement system not only extends the communications range but can greatly improve the reliability of the transmitted data signal. We can now offer our customers a complete, simple to operate, low cost wireless sensor system which provides a very viable alternative to conventional control and instrumentation systems.”

 

The Deeter Group product range includes level sensors, industrial weighing equipment, reed and proximity switches, security switches, termination assemblies, litz and magnetic wire and solar power systems. For more information on the Deeter Electronics range of wireless sensing products call +44 (0)1494 566046 or visit www.deeter.co.uk

About Deeter Group:

The Deeter Group is a privately owned group of companies first established in the UK in 1982 and set up to provide electronic services and products to industry. The Group comprises Deeter Engineering Services Ltd, Deeter Weighing Systems, Deeter Electronics Ltd, Deeter Electronics Inc and Deeter International Ltd. During its existence it has developed from a small local supplier to a Group of companies which trade throughout the world. Deeter now lists among its customers many large international companies and has justly earned its reputation as a supplier of quality products and services.

 

Deeter Electronics was established in 1991 as a distributor of specialist electronic products. It now supplies a range of products to customers in the UK, mainland Europe and the USA. In addition to some sensor products manufactured within the Deeter Group, Deeter Electronics is now either an agent or distributor for a number of market leading component Brands.

 

Contact:

Deeter Electronics Ltd
Deeter House
Valley Road
Hughenden Valley
HP14 4LW

T: +44 (0)1494 566046
F: +44 (0)1494 563961

E: [email protected]

W: www.deeter.co.uk

 

 

Deeter Group Wireless Sensor System

Background

The Deeter Group has been providing electronic services to industry since 1982. With the formation of Deeter Electronics in 1991 the company has become a major international manufacturer and supplier of control and instrumentation systems, including electronic sensors, industrial weighing equipment, reed and proximity switches, security switches, termination assemblies and other products and services to manufacturing industry.

 

A perennial problem with installing control and measurement systems in industrial environments is cabling. Installing and maintaining the reliable operation of cable networks can be very difficult in factories and larger industrial facilities where buildings may be remote. Roads, railways and even rivers may need to be crossed creating their own sets of health and safety hazards. Cable faults can easily be caused by mechanical damage and the environment resulting in costly lost production and safety issues which could result in life hazard, damage to process equipment and unnecessary plant shut-down.

 

The recent advent of compact, high reliability short range wireless devices has allowed Deeter to develop a wireless sensor system which can transform industrial control and measuring systems. Greatly reducing the cost and time required to install, increasing convenience and reliability and enabling simple relocation of sensors should factory layout change. In addition Deeter probes are battery powered removing the additional layer of installation complexity of providing mains power in remote locations for conventional measuring instruments.

 

.A Deeter Wireless Sensor System may include a number of Wireless Routers to form a wireless ‘mesh’ network. This allows signals to be automatically re-routed around any broken links in the mesh creating a built-in self-healing capability to further ensure communications reliability.

 

The Deeter Wireless Sensor System will be welcomed by control engineers in industrial and manufacturing industries such as food and beverages, cooling systems and agriculture.

 

System Applications and Features

The Deeter Wireless Sensor System was primarily designed for use in liquid level sensing, to complement the very popular existing range of Deeter float-switches and continuous level sensors. Countless other applications for the Deeter Wireless Sensor system are possible, including:

• remote monitoring of switch inputs to drive relay outputs

• converting a potentiometer input to a 4-to-20mA current loop output

• mirroring a 4-to-20mA current loop signal

• switching relays at preset input thresholds

 

The System has the following advanced features:

• Sophisticated RF Communications and Wireless Network capability

• Fully automatic operation once the system is installed

• Battery powered remote sensors

 

RF Communications

The system uses very reliable high power RF transceiver modules and rugged external antennae to achieve the best possible wireless communication range. Range can be further extended by adding one or more Deeter Wireless Routers which receive and re-transmit the signal with increased gain. The Base Station acts as the coordinator for the wireless network and operates in the 2.4GHz ISM (Instrumentation Scientific and Medical) frequency band. This allows the system to be used world-wide without requiring a site radio operating licence. Local regulations may restrict the maximum RF transmit power and Deeter provide different variants of the Wireless System devices for the USA, Canadian and European markets to satisfy these constraints. The IEEE 802.15.4 protocol used in the Deeter Wireless Sensor System allows several networks to share the same frequency without interfering with each other. The protocol uses sophisticated techniques to ensure good communications using very low power signalling. This allows the Deeter Wireless Sender or LVCS-RF (RF Liquid Vertical Continuous Sensor) probe to operate using battery power. Once the system is installed it will operate reliably for extended periods without any further intervention. When several Routers are used they form a ‘mesh’ network, and signals can be re-routed around any broken links in the mesh. Thus, the system has a built-in self-healing capability to further ensure communications reliability.

 

Wireless Range

At maximum transmission power (USA version) the distance between sensor node and Base Station may be up to 4km in an ideal, open field installation. For operation in Europe, regulations restrict the maximum transmission power and a range of up to 1000m may be possible. However, in most practical environments the radio signal will be attenuated by obstructions and by multi-path fading caused by reflections. To improve range, a clearer signal path can often be achieved by increasing the height of the antenna and Deeter supply an antenna extension kit for this purpose. A Deeter Wireless Router placed somewhere between the remote sensor and Base Station, or off to one side of the direct line between the two, will greatly extend the wireless range and up to four Routers may be used in a single system.

 

System Devices

There are four devices currently in the Deeter Wireless Sensor product range:

• Base Station

• Wireless Sender

• LVCS-RF Liquid Vertical Continuous Sensor probe

• Wireless Router

 

A basic Wireless Sensor System comprises a Base Station and a single sensor node, either a Sender or LVCS-RF. A Router may be added to the system to improve communications reliability or to extend the wireless range. Up to four Routers may be used in a single system.

The sensor nodes can accept a range of input devices to suit the application:

• Four switch inputs (Sender only)

• An analogue resistive input (Sender and LVCS-RF)

• A 4-to-20mA current-loop sensing input (Sender only)

 

The Base Station has a range of outputs to drive a wide variety of possible

devices:

• Four open-collector transistors for relay operation etc.

• 4-to-20mA current loop driver

• Serial communications output via RS232, RS485 or USB

(At present, serial communications is reserved for diagnostic data. Future

developments are expected to include data-logging features.)

 

The complete Deeter Group product range includes level sensors, industrial weighing equipment, reed and proximity switches, security switches, termination assemblies, litz and magnetic wire and solar power systems. For more information on the Deeter Group range of wireless sensing products call +44 (0)1494 566046 or visit www.deeter.co.uk

About Deeter Group:

The Deeter Group is a privately owned group of companies first established in the UK in 1982 and set up to provide electronic services and products to industry. The Group comprises Deeter Engineering Services Ltd, Deeter Weighing Systems, Deeter Electronics Ltd, Deeter Electronics Inc and Deeter International Ltd. During its existence it has developed from a small local supplier to a Group of companies which trade throughout the world. Deeter now lists among its customers many large international companies and has justly earned its reputation as a supplier of quality products and services.

 

Deeter Electronics was established in 1991 as a distributor of specialist electronic products. It now supplies a range of products to customers in the UK, mainland Europe and the USA. In addition to some sensor products manufactured within the Deeter Group, Deeter Electronics is now either an agent or distributor for a number of market leading component Brands.

 

 

Contact:

The Deeter Group
Deeter House
Valley Road
Hughenden Valley
HP14 4LW

T: +44 (0)1494 566046
F: +44 (0)1494 563961

E: [email protected]

W: www.deeter.co.uk