IIC Heavy Duty Explosion Proof Industrial Telephone JWBT811
Our IIC explosion-proof industrial telephone is a dedicated communication terminal for flammable and explosive hazardous areas classified as IIC gas group. It adopts an explosion-proof structural design complying with international explosion-proof standards, isolating internal electric arcs and high temperature from external explosive gas mixtures.
The rugged yellow die-cast aluminum housing delivers excellent resistance to corrosion, water, dust and vibration. Equipped with a heavy-duty handset and anti-corrosion metal keypad, the unit maintains stable voice communication even under high humidity, salt spray, extreme temperature and loud background noise. Multiple cable gland ports support flexible field wiring.
✅ IIC Explosion-proof Grade – Suitable for IIC explosive gas mixtures (hydrogen, acetylene etc.), approved for Zone 1 and Zone 2 hazardous locations
✅ IP66 Ingress Protection – Fully waterproof, dust-tight enclosure, works outdoors and in wash-down environments
✅ Heavy-duty Die-cast Aluminum Housing – Anti-corrosion, anti-shock, anti-vibration, long service life in harsh conditions
✅ Stainless Steel Metal Keypad – Wear-resistant, vandal-proof, clear tactile feedback for operation with gloves
✅ Noise Cancelling Handset – High SNR receiver & transmitter for clear audio in high-noise industrial sites
✅ Multiple Cable Entry Ports – Standard cable glands for easy on-site wiring and expansion
✅ Wide Operating Temperature Range – Stable performance from low to high temperature environments
✅ Optional Functions – Hotline, auto-dial, emergency one-touch call, VoIP/SIP version available
✅ Vandal Resistant Design – Robust latch and sealed cover to prevent accidental damage and tampering
Application Scenarios
- Oil & gas onshore platforms, pipeline stations
- Chemical processing plants, paint workshops, solvent storage areas
- Refineries, petrochemical facilities
- Coal & metal mining (gas hazardous zones)
- LNG plants, hydrogen energy stations
- Pharmaceutical factories with flammable solvent
- Hazardous waste treatment plants
- Marine on-deck hazardous compartments
- Any Zone1 / Zone2 IIC gas group explosive locations
| Item | Technical data |
| Power Supply | Telephone Line Powered |
| Voltage | 24--65 VDC |
| Standby Work Current | ≤0.2A |
| Frequency Response | 250～3000 Hz |
| Ringer Volume | >80dB(A) |
| Corrosion Grade | WF2 |
| Ambient Temperature | -40～+60℃ |
| Atmospheric Pressure | 80～110KPa |
| Relative Humidity | ≤95% |
| Lead Hole | 3-PG11 |
| Installation | Wall-mounted |
This IIC explosion-proof telephone can be deployed in two mainstream communication solutions:
1. Analog PSTN Solution: Connect to conventional PBX telephone exchange. Each phone has an extension number. Workers dial directly for intercom or external calls. Support emergency hotline setting for one-button calling to control room. No extra network configuration required, simple and stable for small & medium hazardous zones.
2. SIP VoIP Network Solution (Optional): Integrate with industrial SIP PBX / IP communication system. Telephones transmit voice over Ethernet network. Support centralized management, call recording, intercom group, priority emergency call, remote status monitoring. Ideal for large-scale chemical parks and oilfield sites that need unified communication platform.
All telephones work independently when the main system runs normally. In emergency scenarios, auto-dial function ensures the alarm signal reaches the control room reliably.
Every unit passes strict inspection before shipment:
-Explosion-proof structure inspection and pressure test according to Ex d IIC standard
-IP66 waterproof & dust ingress test
-Salt spray corrosion test for coastal and offshore applications
-High & low temperature cycling aging test
-Vibration & mechanical impact test
-Full function audio and dialing test
-Continuous 72-hour power-on stability test
-Raw material incoming inspection and finished product serial traceability
Full test reports and certification documents can be provided for engineering tender and site acceptance.
Q1: What gas types can this IIC explosion-proof telephone be used for?
A: IIC grade covers the most dangerous explosive gases including hydrogen, acetylene, carbon disulfide, etc. It is applicable for all IIA, IIB and IIC gas group hazardous areas.
Q2: What is the difference between IIC and IIB explosion-proof telephone?
A: IIC has a larger safe gap for flame suppression. It can be used for IIC gas which IIB phones cannot support. IIC version is a higher standard for more dangerous working conditions.
Q3: Can this phone work in the rain and outdoor environment?
A: Yes, IP66 rating ensures it is waterproof and dustproof. It can be installed outdoor, but long-term submerged use is not supported.
Q4: Do you provide ATEX / IECEx certificates?
A: Yes, certificates and test reports are available upon request for project bidding and site inspection.
Q5: Can I set an emergency hotline number?
A: Yes, we can pre-program auto hotline / one-touch emergency dial function for you before delivery.
Q6: Is SIP VoIP version available?
A: Yes, we offer analog PSTN standard version and optional SIP VoIP version for IP network systems.
