Sensors & Transducers


Temperature and humidity sensing

November 2008 Sensors & Transducers

Factory calibrated sensors pair with SureCross wireless network.

Banner Engineering has introduced the SureCross temperature and humidity sensor, robust instrumentation optimised for use with the company’s SureCross wireless network.

The SureCross temperature and humidity sensor is factory-calibrated to determine relative humidity to ±2% or ±3,5% (depending on model) and delivers temperature accuracy to ±0,3°C for simple critical data monitoring. Manufactured with a rugged metal housing and IP67 electronics, it provides maintenance-free operation in a wide variety of environmental monitoring applications.

Installation and configuration

Banner designed a proprietary serial sensor interface that enables the temperature and humidity sensor and the wireless node to operate on a FlexPower battery supply for up to 20 years. Fixed and remote-mount node and sensor models enable a wide range of installation scenarios, including induct and freestanding applications. For remotely mounted sensors, cables in lengths up to 3 m are available. A hydrophobic membrane filter for general applications and a sintered stainless steel filter for hostile drying areas are available to meet the requirements of the most demanding environments.

The sensor can be paired with a node that includes an integral battery supply or an external power source including battery, solar or 10-30 V d.c. With an external power supply, two temperature and humidity sensors can be used with a single wireless node. Each node is equipped with an LCD and data is displayed in degrees C or F and relative humidity is in a percentage from 0-100%. The node can be installed as a standalone device, or it can work in conjunction with a gateway, the wireless network controller. The SureCross Wireless Network provides a robust, reliable wireless solution with bidirectional fully acknowledged data transmission. This network employs frequency hopping spread spectrum (FHSS) and time division multiple access (TDMA) to ensure the most reliable data delivery possible. The gateway supports multiple communication outputs and seamlessly integrates with existing wired control systems.

If radio frequency links are lost, all relevant outputs can be set to user-defined conditions until the links are re-established. This deterministic wireless capability makes the products simple to install and more cost-effective than conduit, delivering a reliable, long-lasting solution.

Applications

The SureCross Wireless Network equipped with the serial sensor interface and factory-calibrated temperature and humidity sensors deliver dependable monitoring in a broad range of environments, including:

* Large-scale refrigeration and cold chain storage systems.

* Greenhouses.

* Warehouse areas.

* Pharmaceutical.

* HVAC.

* Textiles.

* Energy management.

* IT resources and data centres.

For more information contact Rodney Topham, RET Automation, +27 (0)11 453 2468, [email protected], www.retautomation.com



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