Wireless data logger eases testing in inaccessible locations

7th May 2015
Mick Elliott

A new wireless data logger will permanently record temperature, humidity and pressure values using miniature transmitter modules over long periods of time, at operating temperatures from -20 °C to +125 °C, even in inaccessible locations.The MSR385WD from MSR Electronics operates in the 868 MHz ISM band, offers these options.

In order to ensure the temperature-resistance of the modules, MSR Electronics is using silicone casting technology for waterproof electronics applications.This technology can be used to protect the wireless sensors of the transmitter modules, allowing for metrological applications even under harsh environmental conditions, for instance in continuous furnaces.The measured values are transmitted by means of transmitter modules equipped with either internal or external temperature, humidity and pressure sensors, in the unlicensed ISM frequency band at 868 MHz, across distances of up to 500 m.

The measuring and transmission intervals of the transmitter modules can be adjusted as follows:1 s, 10 s, 1 min, 15 min, 1 h.Depending on the type of housing selected, the transmitter modules are supplied with power either by means of a rechargeable 260 mAh lithium-polymer battery or an 800 mAh Li-SOCl2 battery.

The optimised power management ensures that – depending on the frequency of measurements and radio transmissions – the power supply to the MSR385SM miniature transmitter modules is warranted for up to five years.

Equipped with the smallest type of housing, such a compact transmitter module weighs approximately 25 g and measures just 35 x 55 x 25 mm externally. Therefore, it can be positioned even in inaccessible locations, for instance in working machines, or for inconspicuously measuring the climate, e.g. in display cabinets of museums.

The wireless data logger is equipped with a colour OLED display for a compact representation of data.The high screen resolution facilitates easy reading of measured values, even in total darkness and from virtually any viewing angle.The display is switched on and off manually; the desired display data can be configured using the MSR PC software.

The MSR385WD will be available by the end of May 2015.

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