Radio system for simple temperature sensors

Signatrol, the Tewkesbury (UK) based manufacturer of the SpyDaq wireless temperature and humidity data logging system, has been awarded a UK patent for some of the communications aspects of SpYdaq, that make their system reliable, yet simple and cost efficient for pharma and food industry monitoring.

Initially designed to monitor and record temperature and humidity in buildings and storage areas, SpYdaq enables easy compliance with HACCP, EN12830, FDA CFR21 Part 11 and other relevant standards – where careful inviolate monitoring of storage conditions is required for quality reasons and to comply with legislation.

Unlike other similar systems on the market, SpYdaq features a unique high redundancy data package, specifically designed by Signatrol and it is this that has been recognized by the Patents Office and the award of UK Patent number 2479520.

SpYdaq monitors key parameters and transmits them, via a licence-free radio band, to a base station which then makes the data available via bespoke display and analysis software, using either an Intranet or the Internet. Using sensors linked by radio means that installation is quick and easy. The transmitters ‘sleep’ and then wake up at defined intervals to transmit the data. Using this method means that the transmitters are purely transmitters and not transceivers, thus reducing the cost and complexity of the system.

SpyDaq wireless from Signatrol

SpYdaq base station and sensors: this unit uses mobile phone links to the cloud for data monitoring and recording

A potential problem would arise with this approach when two or more transmitters try to transmit at the same time, and signals collide, resulting in loss of data. Signatrol has developed its unique communication system to ensure that in the event of a collision no data will be lost. In fact, for a fully populated system, the likelihood of losing a single reading is once in every 67 years.

Brian Turner, Managing Director Signatrol commented: “I am pleased that, although it has taken quite some time, our unique and innovative SpYdaq data logging system has finally been recognized with the grant of Patent. Many customers are already benefiting from this system and the patent will give added confidence to new adopters”

Indeed the Signatrol website quotes many well known names in the pharmaceutical and food industries as their customers: these are the major targets for Signatrol. Included are the NHS, AstraZeneca, Pfizer, GSK, and in foods Cadbury, Kellogg’s, Premier Foods and British Sugar.

The base stations can collect data from up to 16 transmitters, which can optionally also receive an external input signal, as well as monitor temperature and humidity. There is no info about the radio system employed, or the operating range, but various base stations offer local or intranet alarm set points, and there is also a unit that transmits data to the Signatrol cloud system for further recording and control actions. The base stations start at around GBP500, and the sensors at GBP130.

(c) ProcessingTalk.info

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