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MF010 O LC Flex 200x200
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MF010-O-LC (Flex)

The oxygen sensor MF010-O-LC (Flex) is the flexible version of the MF010-O-LC. Through the flexible connection between probe and evaluation unit, the mounting options are far more versatile.

The oxygen sensor MF010-O-LC determines the oxygen concentration in gas mixtures, during operation it monitors its own function and reports in case of hardware malfunction. The sensor can be calibrated without personnel and reference gas in atmospheric air.

The MF010-O-LC (Flex) was designed especially for the automatic control of combustion plants, as well as for oxygen measurements in difficult to reach areas or in self-contained systems (ventilation tubes, containers, etc.). It can be used at maximum exhaust temperatures of 250°C.

A fail-safe operation can be realized by an additional, independent digital output.

Measuring ranges, temperature ranges and product specifications

The oxygen sensors of the product family MF010-O-LC are available for a measuring range from 0.1 to 25 vol% oxygen. The flexible cable between probe and electronic housing has a length of 400 mm. The device is designed for temperature ranges up to + 250°C. Alternatively the measuring device offers an analog interface with 4 - 20 mA or 0 - 10 V and is also equipped with an independent digital output. As a standard the product is equipped with a 34 mm sinter, which makes the system more resistant to impurities. However, due to this modification the reaction time is increased.

Fail safety

The measurement signal output is given from two independent channels. The output signal of the analogue channel is linear between 4 and 20 mA (alternatively 0.1 to 10 V). The digital channel carries a pulse-width modulated alternating signal (high phase 5V, low-phase 0V). The length of the low-phase is the benchmark for the oxygen concentration to be computed in the downstream unit. The times are linear and system specific. The monitoring of both channels allows a fail-safe operation without a second sensor.

Functional Test

The probe is designed so that it can check the operation during its proper functioning. For this the test pin is applied to +24 V DC. The test simulates to the probe a 20% lower oxygen concentration. This change must reflect equally in the analog channel.


The device complies with the generic standards EN 61000-6-2 and EN 61000-6-4 and thus the EMC Directive 2004/108/EC. In addition, it has been certified by TÜV Süd in accordance with DIN VDE 0116 and DIN EN 298.

Maintenance and Service

The device is delivered already calibrated. The interval of the maintenance meets the safety requirements. The device can be calibrated on fresh air and is supporting electrical as well as manual calibration. For the electrical calibration the test pin is set to +24 V DC. The probe calibrates autonomously on fresh air, within a tolerance range of 10%. Outside the tolerance range of the sensor it can be calibrated manually. Manual calibration is performed by means of a potentiometer inside the housing.

For more details, please refer to the technical data or ask our contact person.

Product NameProduct FeaturesProduct Code
MF010-O-LC (Flex) Temperature range < 250°C
Measuring range: 0.1 - 25 vol%
Output: 4 - 20 mA + digital output
Probe length 90 mm
MF010-O-LC (Flex) Temperature range < 250°C
Measuring range: 0.1 - 25 vol%
Output: 0 - 10 V + digital output
Probe length 90 mm


Measuring principle Oxygen partial  
Power Supply Voltage 24 V DC ± 5%
Current approx. 500 mA
Ambient Temperature -10°C to +50°C for the electronics
Air Pressure 900 hPa to 1100 hPa  
Permissible Humidity 15 bis 95% relative humidity non condensing
Output 4 - 20 mA maximum ohmic resistance 500 Ω
or 0.1 - 10 V Impedance 1000 Ω
Digital output Pulse, error, external calibration
Housing Makrolon 8030 (30% DV), UL94 V-1 Colour = grey
Protection class IP 65
Weight approx. 150 g
Dimensions (L x W x H) 105 x 60 x 42 mm
Connecting Cable 5 x 1,5² CU + Functional ground shielded cable

Pin Assignment:

Please ask our contact person.