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Jinzhou Jinshi Mining Equipment Technology Co., Ltd.

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  • Intrinsically Safe Expansion Telephone for Mine

Intrinsically Safe Expansion Telephone for Mine

Product Description

Intrinsically Safe Expansion Telephone For Mine


Product Overview

The spreading telephone is a mine-used sound communication and signal communication device, which is suitable for the environment with danger of gas and coal dust explosion under the coal mine. This device has half-duplex call, dot alert, dot count display, blocking signal output, blocking status indication, external audio input, call recording and other functions.
● Explosion-proof type: intrinsically safe type for mining;
● Explosion-proof mark: ExibI.
Use environmental conditions:
● Ambient temperature: 0 ℃ ~ + 40 ℃;
● Average relative humidity: not more than 95% + 25 ℃);
● Atmospheric pressure: 80kpa ~ 106kpa;
● No significant vibration and shock;
● There is an explosive mixture of methane and coal dust under the coal mine, but there is no mixture of corrosive gases that damage the insulation.


Intrinsically Safe Telephone

Working environment

Amplified telephones are composed of main control board, display board, microphone, button, speaker, battery, connector and other components. The main control board completes data collection and signal transmission functions, and the display board and other accessories complete human-machine interface functions.

The working state of the amplified telephone is divided into the power-on state and the standby state. Without any key operation, it is in the standby state. The processor enters the sleep state and closes all functional circuits. At this time, the circuit consumes only a few microamperes of current. When a key is detected or a communication signal is received, the processor is woken up and turned to the power-on state. After the call or RBI ends, if there is no key operation for more than 15 seconds or no communication signal is received, it automatically enters the standby state.

Expansion Telephone for Mine


■ Main technical index
● External power supply
Provided by mine flameproof and intrinsically safe DC stabilized power supply. Voltage: DC18V. Current: ≤1000 mA.
● Internal power supply
The amplified telephone has a built-in nickel-metal hydride battery pack, which can work normally for 48 hours after the external power supply is cut off.
● Voice intensity, not less than 95dB (A weighting);
● Voice clarity MOS score ≥ 4.0 points;
● Signal transmission: digital signal;
● Communication distance: ≥2.5KM




■Our Company

Jinzhou Jinshi Mining Equipment Technology Co., Ltd. is located in the beautiful coastal city of Jinzhou, specializing in mining communication products and coal Mine automation equipment design and development, production and sales, contract installation related to coal mine safety production monitoring and monitoring system, solutions, after-sales service, etc.

The company has a high-level research and development team, cooperates with many domestic and foreign scientific research institutions, adhering to the "excellence, service-oriented" business policy, adhere to the market-oriented and meet user needs as the development goal, and make every effort to intelligentize our country Mine development and construction services. A series of high-precision automation technology solutions are applied to the mines to escort the safe production of coal mines. Products can also be used in other explosion-proof and non-explosion-proof automation fields, such as chemical, dust, petroleum, heat, security and so on.


Looking for ideal Intrinsically Safe Telephone Manufacturer & supplier ? We have a wide selection at great prices to help you get creative. All the Expansion Telephone for Mine are quality guaranteed. We are China Origin Factory of Mine Intrinsically Safe Telephone. If you have any question, please feel free to contact us.

Product Categories : Mine Communications > Mine Intrinsically Safe Phone

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