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Motorola Two-Way Radios MTP8500Ex Tetra ATEX Series Intrinsically Safe

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MTP8550EX Motorola Tetra Two Way Radios

MTP8500Ex ATEX – Full Color Display with limited Keypad,
GPS and Bluetooth. IP64, IP65, IP67

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SKU: MTP8000EX Categories: Motorola Intrinsically Safe Radios, Portable Radios, Two Way Radios Tags: ATEX IS, Motorola Portables, motorola two way radios, Portable Radios
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  • Description

Tetra EX Two-Way Radios from Motorola

ATEX radios are essential tools for those working in the potentially explosive environments found in the oil, gas and mining industries, providing a safe alternative for two-way communications. Beyond the primary function of ATEX radios to prevent any potential sources of ignition, additional considerations should be made regarding the features of the radio and its suitability to the unique challenges presented in these applications.

Here we look at five key elements of an ATEX radio in oil and gas operations:

Audio performance – Experiencing high levels of noise is an inescapable part of working in the oil and gas industry. Constant drilling, heavy machinery, pumps and compressors can see noise levels regularly exceeding 90dB, making clear, loud audio crucial to two-way communications.

The challenge in the design of ATEX radios for oil and gas operations is driving the speakers to the loudest, clearest possible level without compromising on safety. While the usual solution would be to increase the amount of current driven into the radio, ATEX restrictions means this is not possible.

In addition to this, the unique ambient background noise experienced in oil and gas applications means not all radios will provide the best results. Any radios in use should be optimised for the specific requirements.

Network and radio coverage – Transmission power and receiver sensitivity needs to be maximised to give the best possible coverage. While receiving a signal in the radio will not generally cause any major challenges, it can cause some of the internal components to generate heat, in turn raising the temperature of the radio and increasing the risk of ignition.

Advancements in radio frequency (RF) design have meant higher transmission power can be achieved without raising the temperature of the radio. The challenge is creating a radio that can transmit at the same power levels as non-ATEX radios.

The European Telecommunications Standards Institute (ETSI) standard defines transmit power in “Class” levels. For example, a Class 4 radio has a nominal Tx power of 1W, but the actual definition is 30 dBm +/- 2dB, allowing some design flexibility and manufacturing tolerance. For most modern non-ATEX radios the Tx power is aligned to the higher end of this tolerance, that is, above 1W, however, for ATEX radios the actual measured Tx power of a Class 4 radio is less than 1W – often around 0.7W. This is driven by the need to limit maximum currents in the radio and to limit heating effects.

Rugged for a tough environment – Oil and gas operations can be found in some of the most harsh and unpredictable conditions in the world, so the ATEX radios used must be resilient in the occurrence of extreme heat or extreme cold, as well as exposure to dirt, oil, metal dust and chemicals.

Exposure to multiple water sources is also inescapable, creating a need for radios to provide multiple levels of IP protection, even after thermal cycling, heat shock and drop testing.

ATEX accessories – Having the right accessories for specific environments is a necessity for getting the most from an ATEX radio with remote speaker mics, skull mics, boom mics, noise cancelling headsets, hardhat solutions, smoke diver face masks, earpieces, and large push-to-talk buttons just some of the wide range of accessories used in oil and gas applications.

Usability and ergonomics – As ATEX radios will frequently be used by workers wearing various personal protective equipment (PPE), operation of the radio and its accessories must be optimised for people who may have reduced tactility in their fingers, restricted vision and, as mentioned earlier, work in a loud ambient noise environment.

With many users required to operate from long distances for extended periods of time, the usage of the radio and battery life should extend beyond an average shift of eight hours.

These five key requirements demonstrate the extraordinary technical challenges in delivering communications equipment which not only meets end user needs, but also complies with ATEX and IECEX standards.

For Australia-wide sales call 1800 551 427 or email your specific requirements / frequencies etc to sales@miningtelecoms.com and we will be happy to provide you with a no obligation free quote.

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