Mini float switches with ATEX approval are suitable for use in explosive media and environments according to Directive 2014/34/EU. Mini float switches are passive devices and do not require a power supply.
All standard ATEX devices are offered for a temperature range of -20°C to +105°C in the medium, or -20°C to 70°C above process connection. UniEx.M mini float switches are manufactured according to customer requirements and can therefore be individually configured and used for a wide range of applications.
Simply configure and request UniEx.M now without obligation or arrange a consultation appointment!
Mini float switch in combination with temperature switch/sensor
Optionally, we equip the UniEx.M series devices with temperature switches/sensors. Both temperature switches, which open or close at a desired temperature, and temperature sensors, such as PT100/PT1000, can be combined with the mini-float switch.
| ATEX certification |
BVS 21 ATEX ZQS/E377 Production Quality Assurance Notification |
| Applied standards |
EN IEC 60079-0:2018 General requirements |
| ATEX marking |
CE 0158 |
| Electrical connection |
aluminium housing, stainless steel housing, plug-type connector, sheathed cable |
| Process connection |
thread, flange | For details please see data sheet UniEx.M |
| Tube |
ø 8 mm, material stainless steel 1.4571 | further materials on demand |
| Tube length |
according to specification | max. 1500 mm |
| Float |
ø 27 x 31 mm cylinder, material stainless steel 1.4571 |
| Reed contacts |
max. 3 normally open/ normally closed contacts or change-over contacts (without temperature switch or PT100/PT1000) |
| Switching capacity |
30V / 100mA – Ex barrier mandatory! |
| Pressure |
max. 6 bar |
| Protection rating |
IP 65 |
| Operating temperature |
-20°C to 105°C in medium, -20°C to 70°C above mounting |
| Temperature switch |
in combination with max. 2 switching contacts n.o. / n.c. contact or change over contact |
| PT100 / PT1000 |
in combination with max. 2 switching contacts n.o. / n.c. contact or change over contact |
II 1/2G Ex ia IIC T3...T6 Ga/Gb
Optional: temperature switch / temperature sensor
| Temperature switch |
Bi-Metal |
| Switching function |
Öffner/Schließer |
| Accuracy |
± 5 °C, smaller tolerances on demand | reset-temperature = Temp.-switching point - 30°C ± 15 °C |
| Number of contacts |
max. 2 temperature switches |
| Switching capacity |
30 V / 100 mA |
| Temperature sensor | platinum resistor PT100 / PT1000 according DIN EN 60751, class B |
| Nominal resistance |
PT100: 100 Ohm | PT1000: 1000 Ohm |
| Temperature coefficient |
0,00385 |
| Tolerance class |
DIN EN 60751, class B |
| Self-heating |
PT100: 0,4 K/mW | PT1000: 0,2 K/mW |
| Long-term stability after 1000h at 150°C |
R0 < 0,06 % |
For further technical features and details as well as the ordering code, please see data sheet UniEx.M.
- Level Control in Hazardous Areas
ATEX float switches are used to monitor the liquid level in containers and tanks in environments with potentially explosive atmospheres. They enable accurate level detection and ensure that the liquid level remains within specified limits to minimize potential safety risks. - Pump Control and Protection
In hazardous areas, ATEX float switches take on the task of controlling and protecting pumps. They monitor the liquid level and activate the pump when necessary to ensure an adequate liquid supply. If the liquid level becomes too low, they can deactivate the pump to prevent dry running and associated hazards. -
Alarm Signaling
ATEX float switches also serve as alarm devices in hazardous environments. They can trigger a visual or audible alarm when the liquid level reaches a critical value or when a system malfunction occurs. This allows for quick response and measures to prevent accidents or damage. -
Process Monitoring
ATEX float switches play a crucial role in monitoring processes in hazardous areas. They ensure that the required liquid levels are maintained in the equipment to ensure safe and efficient operation. By automatically controlling the liquid flow, they contribute to optimizing process workflows. -
Liquid Shutdown in Case of Danger
ATEX float switches can also serve as a safety precaution by shutting off the liquid supply to a facility or system in hazardous areas when a danger is detected. This may be necessary, for example, in the case of a gas leak or other critical situation to ensure safety and prevent the spread of an explosion.
- The mini float switch may only be operated with certified intrinsically safe circuits with the permissible maximum values.
- The device must be included in the periodic pressure/safety test of the container.
- The mini float switch must be electrically connected to the equipotential bonding system of the plan
Engler ATEX EG examination certificate
Engler ATEX installation an operating instructions
Engler QM ATEX recertification certificate
- Chemical Industry
In the chemical industry, ATEX float switches are indispensable for monitoring the level of chemicals in tanks, storage tanks, and containers. They ensure accurate detection of liquids such as solvents, acids, and other chemicals to detect potential risks early and maintain safety standards. - Oil and Gas Industry
In the demanding oil and gas industry, ATEX float switches are used to control the level of oil, fuels, and other liquids in tanks, pipelines, and storage facilities. With their precise monitoring, they help prevent leaks and overfills, thus ensuring the safety of the facilities. - Petrochemical Industry
In the petrochemical industry, ATEX float switches play a crucial role in monitoring liquids such as crude oil, chemicals, and gases in tanks, storage tanks, and processing plants. They enable precise level detection to minimize accidents and security risks. - Mining Industry
In the mining industry, ATEX float switches are essential for monitoring liquids such as water, slurry, and chemicals in settling ponds, slurry tanks, and other facilities. Their reliable measurement contributes to the safety of workers and the prevention of environmental pollution. - Energy Generation
In the energy generation sector, whether in power plants or renewable energy facilities, ATEX float switches are essential components for monitoring coolants, oils, and other liquids in tanks and equipment. They ensure precise level detection to maximize the efficiency and safety of the energy generation process. - Tanks for Flammable Liquids
ATEX float switches are the ideal choice for monitoring tanks containing flammable liquids. They reliably detect the level of liquids such as fuels, oils, and chemicals, providing timely warnings of overfill or low liquid levels to minimize potential security risks.
