Shandong Jining Hengwang Industrial and Mining Co

Explosion-proof telephone


Purpose and function
Mine intrinsically safe explosion-proof telephone is an intrinsically safe electrical equipment. The signaling method is dual-tone signaling. Suitable for communication in dangerous places containing explosive gas mixtures such as gas (methane) in coal mines

. Through its associated equipment, the telephone coupler can be matched with the program-controlled dispatch switch and the length of cable connected to it.
The mining intrinsically safe explosion-proof telephone has the characteristics of beautiful appearance, small size, light weight and reliable performance. It can replace similar products at home and abroad. Explosion-proof type: intrinsically safe for mining. Explosion-proof mark: b.
Structural Features
The phone casing is made of anti-static and flame-resistant B plastic injection molding. It is waterproof, dustproof and anti-corrosive, with a high protection level and is suitable for

extremely harsh environments.
Sit-hang dual-purpose installation, using a new contactless switch with long service life, effectively solving the shortcomings of mechanical switches that are prone to damage due to malfunction

There are no movable parts on the phone.
The keyboard is fully sealed with luminous touch buttons, ring current call audible and visual display, and is equipped with emergency call hangup and redial keys.
New structural design and unique small installation cavity make it easier to install external cables and replace handles (no need to open the big cover).
Equipped with a call distance gain adjustment switch, which can adjust the gain of sending and receiving calls according to the distance between the phone and the dispatch switchboard. It is suitable for coal mines

When the underground call distance is long and the line insulation is poor.
Technical Parameters
Feed voltage:
Ringing voltage
Ringing sound level B (simulation line)
Electrical sound and signaling indicators: in line with B
Intrinsic safety parameters:
Dimensions
Weight:
Jining Hengwang Industrial and Mining Machinery Co., Ltd. mainly produces the following products: start and stop sensors, smoke sensors,

/High and low concentration Methane sensor, carbon monoxide sensor, R carbon dioxide sensor deviation sensor,
deviation switch, speed sensor, temperature sensor, intrinsically safe infrared temperature sensor, start-stop sensor

Sensor, chemistry Oxygen self-rescuer, pressure air self-rescuer, positive pressure oxygen respirator,
negative pressure oxygen respirator, B portable methane detection alarm
Prices are favorable, customers are welcome to inquire and purchase! ! ! (_)


Telephone:
Fax:
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Manager: Han Ting
:
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Shandong Jining Hengwang Industrial and Mining Machinery Co., Ltd.