KRIWAN's level switches EX are specifically designed to ensure maximum safety and precision in liquid monitoring within potentially explosive environments. With their robust construction and certified technology, they meet the highest standards and deliver reliable performance in demanding applications.
Whether in the chemical industry, the oil and gas sector, or other sensitive areas, the EX models are the ideal choice when safety and quality are paramount. Their easy installation and versatile applicability make them the preferred solution for applications where compromise is not an option.
Innovations and Advantages of the level switches EX at a Glance:
Productinformation
Get comprehensive details on the technical specifications of the INT278 CAN EX, specifically designed for precise liquid monitoring in potentially explosive areas.
The INT278 CAN EX must only be used in combination with the appropriate screw-in part.
| Article number | 52 K 482 S080 | 41 K 482 S080 |
| Permissible media temperature | max. +100°C |
| Permissible ambient temperature | -20 ≤ Ta ≤ +60°C |
| Function | min |
| Startup bypass | 90 sek. ± 5 s |
| Switching delay | 3 sek. ± 1 s |
Locked shutdown | yes |
| Running detection | yes |
Alarm contact | Changeover |
Connection cable length | 1m |
Housing material | PA Fiberglass reinforced |
| Certification | UL, EX |
| Protection class according to EN 60529 | IP54 In the mounted condition |
| Power supply | AC50/60 Hz 230V | AC50/60 Hz 115V |
| Article number | 02 K 465 S21 |
| Permissible media temperature | max. 100 °C |
| Permissible ambient temperature | -30 ≤ Ta ≤ +60°C |
| Operating pressure | 42 bar |
| Burst pressure | 210 bar |
| Screw-in thread | M20x1,5mm |
Housing material | Nickel-plated steel |
Designed for use in EX-certified areas
The INT278 CAN EX is certified for use in explosion-prone areas according to II 3G Ex ec nC IIC T4 Gc and enables contactless and precise monitoring of liquid levels – perfectly suited for compressors, pumps, and containers.
Weitere Informationen zu unseren KRIWAN Lösungen für explosionsgefähredete BereichePrecise level measurement in demanding applications
– Application examples for the KRIWAN INT278 CAN EX
In a refinery, the sensor is installed in a liquefied gas storage tank to continuously monitor the liquid level. Due to the potentially explosive atmosphere and high safety requirements, the INT278 CAN EX is ideally suited. The sensor is robust enough to withstand temperature fluctuations and chemical exposure. This application helps prevent costly leaks and ensures safe operation.
A pharmaceutical company uses the sensor to monitor the refrigerant level in a cleanroom facility, where liquid refrigerant is essential for drug production. Given the strict hygiene and safety requirements in these areas, the explosion-proof design and chemical resistance of the sensor are advantageous. The sensor detects deviations in the refrigerant level early, allowing production to continue without interruptions.
In a manufacturing facility, the INT278 CAN EX is used in hydraulic systems of CNC machines. The sensor measures the oil level in the hydraulic system, ensuring that the oil level remains within the optimal range. In the event of a critical drop in the liquid level, the system automatically triggers a warning to prevent damage to the equipment.
In a biogas plant, the sensor monitors the liquid and sewage sludge levels in a fermenter. Since biogas plants are explosion-prone areas, the EX-certified sensor is an ideal solution. The sensor continuously transmits the measurement data to the plant's control system. This allows operators to optimize the process while preventing overflow in the fermenter, enhancing both the safety and efficiency of the plant.
In a data center, the sensor is used to monitor the refrigerant level in a large cooling system that maintains a constant temperature in server rooms. The sensor reliably detects fluctuations in the liquid level, even with high evaporation due to intense use. Thanks to real-time data transmission, operators can quickly respond to a low liquid level and prevent damage to the sensitive IT infrastructure.
Advantages of the KRIWAN Level Sensor for EX Applications
Yes, the INT278 CAN EX is compatible with most refrigerants, including NH₃.
An integrated LED signals the current status using blink codes:
Yes, the potential-free NO contact can be directly wired into a safety circuit without an auxiliary relay. Integrated self-monitoring enhances operational safety, and installation checks ensure proper assembly.
The sensor uses infrared pulses, which are either reflected or absorbed within the glass cone depending on the medium. This allows it to accurately detect whether liquid or gas is present at the measuring point.
Yes, the INT278 CAN EX is designed for ambient temperatures ranging from -20°C to +60°C and medium temperatures up to a maximum of 120°C (short-term).
The sensor is compatible with various media, such as oils and refrigerants, including NH₃. However, a compatibility check is recommended for particularly aggressive media.
The sensor is mounted with a screw-in part (M20x1.5 mm thread, torque 75 Nm). The evaluation unit can be easily plugged in without opening the medium circuit.
The evaluation unit is replaceable without opening the medium circuit, simplifying maintenance and repairs.
A reset of the power supply for at least three seconds is sufficient to release the lock and restart the sensor.
Our level switch categories for every application:
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The level switches ADAPT stand for maximum flexibility and easy integration. Thanks to the innovative M12 plug-in connection, cables can be attached individually and as required. This solution offers enormous advantages, especially in large systems: Maintenance work can be carried out quickly and efficiently, as the cable can remain unchanged in the wiring harness. The level switch ADAPT also makes it easy to replace the sensor without the need for an electrician. Perfect for applications where customisability and reliability count.
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The level switches EXTENDED have been specially developed for demanding applications. With a temperature resistance of up to 160°C and encapsulated electronics, they are ideal for use in heat pumps and refrigerant compressors. The innovative design prevents icing and increases durability even under extreme conditions. The level switches EXTENDED are the first choice for systems that have to work with modern refrigerants and high temperature requirements.
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