Explosion Proof Temp Sensor in Oman | Ex Temperature Sensors
The ATEX TTJGB-1..Exi Temperature Sensor provides intrinsically safe temperature measurement for liquids and gases in hazardous industrial environments. As a reliable Explosion Proof Temp Sensor in Oman, it supports HVAC systems, refrigeration plants, cooling-water circuits, process tanks, pipelines, heat exchangers, chemical facilities, refineries, and oil and gas installations.
The TTJGB-1..Exi uses a Type J thermocouple sensing element housed inside a durable 9 mm stainless-steel thermowell. It can measure temperatures from approximately −40°C to +150°C and can be supplied with one or two thermocouple elements. Related versions in the same product family include the TOPGB-1..Exi Pt100 sensor and the TTKGB-1..Exi Type K thermocouple.
The sensor provides ATEX Ex ia intrinsic-safety protection, an IP65 aluminium connection head, replaceable measuring inserts, multiple process connections, and mounting lengths from approximately 50 mm to 2,000 mm. These features support accurate measurement and easier maintenance in demanding industrial applications.
Atex Hub supplies ATEX temperature sensors across Oman, the UAE, Saudi Arabia, Qatar, Kuwait, Bahrain, Europe, Africa, and worldwide for hazardous-area HVAC, cooling, refrigeration, heating, and process-control projects.
What Is an ATEX TTJGB-1..Exi Temperature Sensor?
The TTJGB-1..Exi is an industrial head-mounted thermocouple sensor designed to measure the temperature of liquids and gases in hazardous locations.
Its Type J sensing element consists of iron and copper-nickel conductors joined at the measuring point. When the measuring junction experiences a different temperature from the reference junction, it produces a small electrical voltage. A compatible temperature controller, transmitter, PLC, or indicator converts this voltage into a temperature reading.
The sensor includes a process probe, threaded connection, replaceable measuring insert, aluminium terminal head, and protected cable entry. Its construction makes it suitable for installation in:
- Process pipelines
- Liquid storage tanks
- Cooling-water lines
- Refrigeration circuits
- Air ducts
- Heat exchangers
- Process vessels
- Industrial machinery
The sensor family includes three main configurations:
- TOPGB-1..Exi: One or two Pt100 RTD elements
- TTKGB-1..Exi: One or two Type K thermocouple elements
- TTJGB-1..Exi: One or two Type J thermocouple elements
The Type J version supports a temperature range from approximately −40°C to +150°C, while the related Pt100 model covers approximately −200°C to +150°C.
Key Features of the Explosion Proof Temperature Sensor
The Explosion Proof Temperature Sensor combines intrinsically safe measurement, interchangeable inserts, flexible connection options, and durable stainless-steel construction.
- Type J thermocouple element: Provides dependable temperature measurement from approximately −40°C to +150°C.
- Single or dual sensing elements: Available with one or two Type J thermocouples for standard or redundant measurement.
- Intrinsically safe circuit: Uses Ex ia protection for low-energy temperature measurement in hazardous areas.
- ATEX gas protection: Marked II 1/2G Ex ia IIC T6 for suitable explosive gas atmospheres.
- ATEX dust protection: Marked II 1/2D Ex iaD 20/21 T85°C for combustible-dust environments.
- Mining configuration: An optional connection-head arrangement supports M1 Ex ia I applications.
- Replaceable measuring insert: Supports maintenance without replacing the complete process assembly.
- Insert options: Compatible with W1./6 Exi replaceable inserts or W2./6 Exi mineral-insulated inserts.
- Stainless-steel thermowell: Uses corrosion-resistant 1.4541 stainless steel.
- 9 mm sensor diameter: Provides a practical balance between mechanical strength and temperature response.
- Flexible insertion lengths: Available from approximately 50 mm to 2,000 mm, with special lengths possible.
- Threaded process connections: Available with G½-inch or M20 × 1.5 connections.
- Aluminium connection head: Uses an XE-DANA S1-type head.
- IP65 enclosure protection: Resists dust and water exposure during industrial service.
- Multiple cable entries: Supports M20 × 1.5 as standard or optional ½-inch NPT.
- Output flexibility: Supports direct thermocouple output or an optional 4–20 mA transmitter.
- Industrial accuracy classes: Available in Class 1 or Class 2 thermocouple accuracy.
- Wide ambient tolerance: The connection assembly supports ambient temperatures from approximately −40°C to +100°C.
How Does the Ex Proof Temp Sensor Work?
The Ex Proof Temp Sensor converts a temperature difference into a low-level electrical signal.
Inside the TTJGB-1..Exi sensor, two different metal conductors form a Type J thermocouple junction. The metals are iron and copper-nickel.
When the sensing junction heats or cools, it generates a small voltage. The value of this voltage changes according to the measured temperature.
The signal travels through the replaceable insert to the terminals inside the aluminium connection head. From there, the signal can connect to:
- A PLC thermocouple input
- A temperature controller
- An industrial indicator
- A data logger
- A SCADA system
- A building-management system
- A head-mounted temperature transmitter
- A safety monitoring system
When a 4–20 mA transmitter is fitted, the transmitter converts the small thermocouple voltage into a standard industrial current signal. This improves transmission over longer cable distances and simplifies connection to PLC or control-panel analogue inputs.
In a hazardous location, the sensor circuit connects through a compatible intrinsic-safety barrier or galvanic isolator. The barrier limits the voltage, current, and power available in the field circuit.
The control system can use the temperature measurement to:
- Start or stop an HVAC fan
- Control a cooling-water valve
- Operate a circulation pump
- Adjust a refrigeration system
- Trigger a high-temperature alarm
- Stop a compressor during overheating
- Protect a process vessel
- Record temperature trends
- Activate an emergency shutdown
Applications of the Hazardous Area Temperature Sensor
The Hazardous Area Temperature Sensor supports temperature measurement across industrial cooling, refrigeration, HVAC, and process systems.
- Oil and gas facilities: Measures liquids and gases in pipelines, process skids, tanks, and utility systems.
- Chemical plants: Monitors reactors, storage vessels, transfer lines, cooling systems, and process media.
- Petrochemical facilities: Supports temperature monitoring around hydrocarbons and chemical processes.
- Refineries: Measures fuel, oil, gas, cooling water, and process-line temperatures.
- Industrial HVAC systems: Monitors heating coils, cooling coils, duct air, and equipment temperatures.
- Refrigeration plants: Measures suction lines, discharge lines, condenser circuits, and process fluids.
- Cooling-water systems: Monitors water temperatures at pumps, pipes, tanks, and heat exchangers.
- Heat exchangers: Measures inlet, outlet, and process-medium temperatures.
- Storage tanks: Tracks the temperature of approved chemicals, fuels, oils, and industrial liquids.
- Process pipelines: Provides direct temperature measurement through threaded connections.
- Gas-processing plants: Measures process gases and utility-system temperatures.
- Compressor stations: Monitors cooling circuits, bearings, lubrication systems, and gas lines.
- Marine and offshore facilities: Supports temperature measurement in corrosive and humid industrial locations.
- Pharmaceutical plants: Measures suitable utility, cooling, and controlled-process temperatures.
- Combustible-dust facilities: Supports intrinsically safe sensing in approved dust-hazard environments.
Technical Specifications of the ATEX TTJGB-1..Exi Sensor
| Specification | Product Details |
|---|
| Product Name | ATEX TTJGB-1..Exi Temperature Sensor |
| Product Type | Intrinsically safe head-mounted thermocouple sensor |
| Sensor Family | TOPGB-1..Exi / TTKGB-1..Exi / TTJGB-1..Exi |
| TTJGB Sensing Element | Type J, Fe-CuNi thermocouple |
| Number of Elements | One or two |
| TTJGB Temperature Range | Approximately −40°C to +150°C |
| Related Pt100 Range | Approximately −200°C to +150°C |
| Related Type K Range | Approximately −40°C to +150°C |
| Output Options | Thermocouple or 4–20 mA |
| Thermocouple Accuracy | Class 1 or Class 2 |
| Measuring Insert | W1./6 Exi or mineral-insulated W2./6 Exi |
| Process Connection | G½-inch or M20 × 1.5 |
| Mounting Length | Approximately 50–2,000 mm |
| Sensor Diameter | 9 mm |
| Thermowell Material | Stainless steel 1.4541 |
| Connection Head | XE-DANA S1 aluminium-alloy head |
| Cable Entry | M20 × 1.5 or optional ½-inch NPT |
| Cable Diameter Range | Approximately 5–10 mm |
| Ingress Protection | IP65 |
| Ambient Temperature | Approximately −40°C to +100°C |
| Gas Marking | II 1/2G Ex ia IIC T6 |
| Dust Marking | II 1/2D Ex iaD 20/21 T85°C |
| Optional Mining Marking | M1 Ex ia I with N1 connection head |
| Approvals | CE and ATEX |
The product family supports Pt100, Type K, and Type J sensing elements, direct RTD or thermocouple outputs, and optional 4–20 mA transmission. The TTJGB-1..Exi configuration specifically uses a Type J thermocouple.
Sensor Construction, Replaceable Insert and Ex Protection
The TTJGB-1..Exi uses a strong 1.4541 stainless-steel thermowell to isolate the measuring insert from the process medium.
This thermowell protects the sensing element against:
- Process pressure
- Flow forces
- Mechanical contact
- Moisture
- Suitable industrial liquids
- Corrosive operating environments
- Routine maintenance damage
The 9 mm probe diameter offers suitable strength for pipeline, vessel, tank, and HVAC installations.
The replaceable measuring insert improves maintenance. Technicians can remove and replace the internal thermocouple assembly while retaining the threaded process connection and outer thermowell.
Available insert styles include:
- W1./6 Exi: Replaceable conventional measuring insert
- W2./6 Exi: Mineral-insulated replaceable insert
A mineral-insulated insert can provide improved vibration resistance, flexibility, and temperature response in demanding industrial applications.
The XE-DANA aluminium connection head protects the terminals and optional transmitter. Its IP65 construction prevents harmful dust entry and protects against water jets when installers use the correct cable gland and maintain the enclosure seals.
The Ex ia marking means the measurement circuit uses intrinsic-safety protection. The complete circuit must include correctly matched equipment, such as:
- TTJGB-1..Exi sensor
- Certified intrinsic-safety barrier
- Galvanic isolator
- Compatible thermocouple input
- Approved transmitter
- Correct cable parameters
- Proper wiring segregation
- Hazardous-area documentation
Selection, Installation and Maintenance
Correct sensor selection helps maintain measurement accuracy, process sealing, and hazardous-area compliance.
- Select the TTJGB-1..Exi Type J sensor for applications between approximately −40°C and +150°C.
- Choose the related Pt100 model when lower temperatures or resistance measurement are required.
- Select one sensing element for standard measurement.
- Select two elements for redundant measurement, separate monitoring, or control and safety functions.
- Choose Class 1 accuracy when tighter measurement performance is required.
- Select the mounting length so the sensing tip reaches the representative process area.
- Avoid an excessively short insertion depth that measures only the pipe-wall temperature.
- Match the G½-inch or M20 × 1.5 process connection to the equipment.
- Use a suitable process seal for the operating pressure, temperature, and medium.
- Choose the standard M20 × 1.5 or optional ½-inch NPT cable entry.
- Use a certified ATEX cable gland with the correct cable diameter.
- Confirm compatibility between the sensor, barrier, transmitter, and control-system input.
- Verify all intrinsic-safety entity parameters before energising the circuit.
- Keep intrinsically safe wiring separated from ordinary power and control wiring.
- Connect the correct Type J compensation or extension cable.
- Maintain thermocouple polarity throughout the circuit.
- Avoid placing the aluminium connection head above its approved ambient temperature.
- Inspect the thermowell for corrosion, erosion, or mechanical damage.
- Check the cable gland, terminal screws, enclosure cover, and seals regularly.
- Calibrate the sensor according to the site’s quality and maintenance schedule.
- Allow only qualified hazardous-area technicians to modify the sensor circuit.
Certifications, Standards and Compliance
The TTJGB-1..Exi Temperature Sensor carries CE and ATEX approval for intrinsically safe temperature measurement in hazardous gas and combustible-dust areas.
Why Choose Atex Hub for Explosion Proof Temperature Sensors?
Atex Hub supplies Explosion Proof Temperature Sensors for hazardous-area HVAC, cooling, refrigeration, heating, and industrial process applications.
- Supplies Explosion Proof Temp Sensors across Oman, the UAE, Saudi Arabia, Qatar, Kuwait, Bahrain, Europe, Africa, and worldwide.
- Provides Type J, Type K, and Pt100 sensor configurations.
- Offers single and dual sensing elements.
- Supplies direct sensor and 4–20 mA output options.
- Provides replaceable and mineral-insulated measuring inserts.
- Offers mounting lengths up to approximately 2,000 mm.
- Supports hazardous gas and combustible-dust areas.
- Supplies barriers, galvanic isolators, transmitters, indicators, and PLC interfaces.
- Assists with sensing element, accuracy, process connection, length, and transmitter selection.
- Provides technical submittals and hazardous-area documentation.
Frequently Asked Questions
1. What is the TTJGB-1..Exi Temperature Sensor?
The TTJGB-1..Exi is an intrinsically safe Type J thermocouple sensor for measuring liquid and gas temperatures in hazardous areas.
2. Is the Explosion Proof Temp Sensor suitable for Oman?
Yes. The Explosion Proof Temp Sensor in Oman supports correctly designed HVAC, refrigeration, oil and gas, and process-control installations.
3. What is its measuring range?
The TTJGB-1..Exi Type J version measures approximately −40°C to +150°C.
4. Which sensing element does it use?
It uses one or two Type J iron-copper nickel thermocouple elements.
5. What outputs are available?
The sensor provides a direct thermocouple output or an optional 4–20 mA signal.
6. Can the measuring insert be replaced?
Yes. The sensor supports replaceable W1./6 Exi or W2./6 Exi inserts.
7. Which process connections are available?
Available process connections include G½-inch and M20 × 1.5.
8. What is the probe diameter?
The stainless-steel thermowell has an approximate diameter of 9 mm.
9. Does the sensor require an intrinsic-safety barrier?
Yes. It must connect through a compatible Ex i barrier or galvanic isolator as part of the approved circuit.
10. Can Atex Hub supply customised sensor lengths?
Yes. Atex Hub supplies standard lengths from approximately 50 mm to 2,000 mm, along with project-specific lengths.
Conclusion
The ATEX TTJGB-1..Exi Temperature Sensor provides dependable and intrinsically safe temperature measurement for liquids and gases in hazardous industrial environments.
Its Type J thermocouple covers approximately −40°C to +150°C. The sensor uses a 9 mm stainless-steel thermowell, G½-inch or M20 × 1.5 process connection, IP65 aluminium head, and interchangeable measuring insert. Direct thermocouple and optional 4–20 mA outputs support integration with PLCs, controllers, indicators, transmitters, and SCADA systems.
The II 1/2G Ex ia IIC T6 gas marking and II 1/2D Ex iaD 20/21 T85°C dust marking support correctly engineered hazardous-area measurement circuits.
For organisations seeking a reliable Explosion Proof Temp Sensor in Oman, the TTJGB-1..Exi supports HVAC systems, refrigeration plants, cooling circuits, process pipelines, tanks, heat exchangers, chemical plants, refineries, and oil and gas facilities.
Atex Hub supplies ATEX temperature sensors across Oman, the GCC, Europe, Africa, and worldwide.
