Optical level monitoring is used for non-contact single-point measurement of liquid levels, e.g. in compressors, pumps, vessels, etc. The solution consists of two components, the screw-in part and the evaluation unit. The screw-in part for optical level detection is permanently installed at the measuring point. The electronic evaluation unit can be mounted or replaced without time-consuming evacuation of the system and draining of the oil.
The optical level monitoring devices from KRIWAN protect refrigerant compressors in particular from leakage, oil deposits in the refrigeration circuit or other malfunctions. The range includes different product versions for monitoring the liquid level in refrigerant compressors, oil and refrigerant receiver and oil separators.
Robust design or increased temperature requirements?
Select the appropriate optical level switch from our extensive product range.
INT276 ICN and INT276 ICX
Moisture from the warm ambient air always condenses at the coldest point. If this happens to be the refrigerant receiver, this can lead to icing between the glass cone and the evaluation unit. A special product version has therefore been developed for this purpose. It is optimized for use on the CO₂ refrigerant receiver and is resistant to icing of the optical measuring principle.
INT279 LN and INT279 LX
Universally applicable for oil management in systems with conventional refrigerants and compressor-typical temperature requirements.
INT276 CN+ and INT276 CX+
Oil management for natural refrigerants with high temperature requirements up to 140 °C e.g. CO2 or NH3. Also suitable for heat pumps with higher temperature requirements.
KRIWAN offers you a variety of optical level switches with different technical specifications. In the following table, you will find a small selection of our level switch.
Contact our specialists and we will find the right product together with you!
| Designation: | INT275 L | INT276 ICN | INT278 LCA | INT279 LN | INT279 LX |
| Permissible media temperature | max. +80 °C | max. +120 °C (<16.000h) max. +100 °C | max. +100 °C | max. +100 °C | max. +100 °C |
| Function | min | min | min | min | max |
Start-up bridging | no | no | 90 sec. | no | no |
| Switching delay | 3 sec. | 3 sec. | 3 sec. | 3 sec. | 3 sec. |
| Interlocked shutdown | no | no | yes | no | no |
| Run detection | no | no | yes | no | no |
| Alarm contact | N/O contact | Changeover | Changeover | Changeover | Changeover |
| Connection cable length | 1m | 1m, 2m, 5 m, 10m | 1m, 3m | 10m | 10m |
| Certification | UL | no | UL | no | no |
| Power supply | AC50/60 Hz 230V AC50/60 Hz 115V AC/DC 50/60 Hz 24V | AC50/60 Hz 230V AC/DC 50/60 Hz 24V | AC50/60 Hz 230V AC50/60 Hz 115V | AC/DC 50/60 Hz 24V | AC/DC 50/60 Hz 24V |
In addition to the evaluation unit, the two-component design also includes the matching screw-in part. Our screw-in parts for the optical level switches are available for different thread types and are suitable for natural refrigerants such as NH3 and CO2.
| Article number | Operating pressure | Medium temperature |
| 02K460S23 | 42 bar | -30°C...+120°C |
| 02K460S24 | 46 bar (-10°C…+120°C) 34,5 bar (-30°C…-10°C) | -30°C...+120°C |
| 02K460S33 | 42 bar | -30°C...+120°C |
| 02K460S34 | 46 bar (-10°C…+120°C) 34,5 bar (-30°C…-10°C) | -30°C...+120°C |
| 02K460S40 | 140 bar (-10°C…+120°C) 105 bar (-30°C…-10°C) | -30°C...+120°C |
| Article number | Operating pressure | Medium temperature |
| 02K463S040 | 140 bar (-10°C…+120°C) 105 bar (-30°C…-10°C) | -30°C...+120°C |
| Article number | Operating pressure | Medium temperature |
| 02K462S21 | 46 bar | -30°C...+120°C |
| 02K462S40 | 140 bar (-10°C…+120°C) 105 bar (-30°C…-10°C) | -30°C...+120°C |
| Article number | Operating pressure | Medium temperature |
| 02K465S21 | 42 bar | -30°C...+120°C |
| 02K465S22 | 46 bar (-10°C…+120°C) 34,5 bar (-30°C…-10°C) | -30°C...+120°C |
| 02K465S24 | 63 (-10°C…+120°C) 48 bar (-60°C…-10°C) | -30°C...+120°C |
| 02K465S40 | 140 bar (-10°C…+120°C) 105 bar (-30°C…-10°C) | -30°C...+120°C |
| Article number | Operating pressure | Medium temperature |
| 02K466S021 | 60 bar (-10°C…+120°C) 45 bar (-30°C…-10°C) | -30°C...+120°C |
| Article number | Operating pressure | Medium temperature |
| 02K461S21 | 42 bar (-10°C…+120°C) 31,5 bar (-30°C…-10°C) | -30°C...+120°C |
KRIWAN Level Sensors
Gain precise insights into the liquid levels with our state-of-the-art level sensors. As a leading provider in the field, we offer innovative solutions for accurate and reliable level measurement in various applications. Our level sensors stand out for their advanced technology and high sensitivity, providing you with precise monitoring and control over your liquids.
Whether you are in the industrial sector, environmental protection, or other fields, our level sensors offer a versatile solution to meet your requirements. With a focus on quality and precision, our sensors enable efficient monitoring to optimize resources and reduce costs. Trust in our expertise to enhance the performance of your facilities while keeping a precise eye on the liquid levels.
Discover the benefits of our level sensors and get in touch with us to discuss customized solutions for your specific needs. We are here to ensure that you always have the optimal overview of your liquids.
Level Measurement for Your Facilities
Enhance your level measurement with our advanced level sensors. Our cutting-edge level sensors enable reliable level measurement, ensuring not only accuracy but also efficiency.
Our level measurement technology allows you to precisely determine the current level of your liquids, leading to optimized resource utilization and cost control. Regardless of the industry, our sensors offer tailored solutions to meet your specific requirements. We understand the importance of accurate level measurements for the smooth operation of your facilities, and our sensors are designed to help you maximize performance.
Rely on our experience and technology to elevate your level measurement to the next level. Contact us today to discuss customized solutions for your specific needs and optimize the efficiency of your level measurement.
Often these are already installed on the compressor. However, they can also be used on pressure vessels such as oil collectors, refrigerant collectors or oil separators. For this purpose, we have screw-in parts certified in accordance with the Pressure Equipment Directive in our portfolio.
Refrigerant, oil, fruit juice, etc.
No, you don’t need to keep different versions of the level switch on stock. You can monitor refrigerant and oil with the same product.
What possibilities do the KRIWAN INT275 - INT279 level switches offer in practice? Our application sheets provide interesting insights.
