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F255 Miniature Diaphragm Loadcell

Standard Ranges 100, 200, 400, 800N and 1.6, 3.2 and 6.4kN (10 to 640kgf)

Novatech F255 load cell – precision force measurement sensor

Novatech load cell product animation – force measurement sensor in operation

F255 Miniature Diaphragm Loadcell. Geometry: Very small loadbutton cell for force measurement in confined spaces. Used in compression and/or tension on a wide range of OEM or end-user applications.

The F255 Miniature Diaphragm Load cell is a very small load button cell designed for precise force measurement in confined spaces. It is suitable for both compression and tension applications and is widely used in a variety of OEM and end-user environments.

Bi-directional versions of the F255 show a slight difference between output signals for compression and tension. All standard bi-directional load cells are carefully calibrated in both modes, and the test and calibration certificate clearly specifies the output for each direction, providing confidence in measurement accuracy for critical applications.

This load cell is particularly well-suited to force measurements in confined spaces where control of critical parameters is essential. Its compact geometry makes it ideal for mobile, workshop, and laboratory setups, as well as for static and dynamic testing in industrial processes. Engineers and scientists also rely on the F255 for a wide range of scientific and engineering test work, where both precision and reliability are required.

Novatech can design variants of this load cell to meet specific project requirements, including fully compensated versions for operation up to +250°C. Our engineering team works closely with clients to ensure each load cell is configured for its intended application while maintaining structural integrity and measurement accuracy.

With its small footprint, bi-directional capability, and traceable calibration, the F255 Miniature Diaphragm Load cell provides a versatile and dependable solution for force measurement in challenging environments, making it a trusted choice for precision engineering and industrial testing.

FAQ’s

Can the F255 measure both compression and tension accurately?

Yes. The F255 is engineered for precise bi-directional force measurement. Each unit is individually calibrated in both compression and tension, and the certificate records the outputs for each mode, ensuring accuracy and confidence in demanding applications.

Can Novatech customise the F255 for my specific application?

Absolutely. Novatech can modify the F255 to suit unique project needs, including alternative dimensions, specialised mounting arrangements, or high-temperature versions rated up to +250°C. Our engineering team evaluates every requirement to ensure suitability and reliability.

Is the F255 suitable for installations with limited space?

Yes. The compact diaphragm design of the F255 makes it ideal for areas with very restricted space. It is widely used in OEM assemblies, precision equipment, and confined test setups where accurate, stable force measurement is required without compromising structural performance.

What load capacities are available for the F255 miniature diaphragm load cell?

The F255 is available in seven standard ranges: 100N, 200N, 400N, 800N, 1.6kN, 3.2kN, and 6.4kN (10 to 640kgf). Each range handles a safe overload of 50% of the rated load and an ultimate overload of 100%, giving you a margin of protection against unexpected load peaks during test work.

How should the F255 be installed and wired?

The load must be applied directly through the F255’s central loading axis. Each unit is supplied with 2 meters of 4-core screened PVC cable. To get a positive signal in tension mode, reverse the signal connections. Note that the cable screen is not connected to the load cell body.

Does the F255 come with a calibration certificate and warranty?

Yes. Every F255 includes a calibration certificate in the standard price, with calibration carried out in our laboratory and traceable to European Standards. Each load cell is also backed by a standard one-year warranty and built from hardened stainless steel with IP65 sealing.

How do I choose between the F255 and Novatech’s other miniature diaphragm load cells?

It mainly comes down to available space and load range. The F255 is the 30mm diameter model covering 100N to 6.4kN. For smaller spaces, the F251 (20mm) covers 100N to 3.2kN, the F250 (15mm) 100N to 800N, and the F259 (1/2″) 250N to 1kN. Our engineers can help you confirm the right model.

Specification

Parameter	Value	Unit
Non-linearity - Terminal	±0.5	% RL
Hysteresis	±0.5	% RL
Creep - 20 minutes	±0.1	% AL
Repeatability	±0.1	% RL
Rated output - Nominal	1.6	mV/V
Rated output - Rationalised	1.0	mV/V
Rationalisation tolerance (applies to single direction calibrations)	±0.5	% RL
Zero load output	±4	% RL
Temperature effect on rated output per °C	±0.005	% AL
Temperature effect on zero load output per °C	±0.03	% RL
Temperature range - Compensated	-10 to +50	°C
Temperature range - Safe	-10 to +80	°C
Excitation voltage - Recommended	10	V
Excitation voltage - Maximum	10	V
Bridge resistance	350	Ω
Insulation resistance - Minimum at 50Vdc	500	MΩ
Overload - Safe	50	% RL
Overload - Ultimate	100	% RL
Sealing	IP65

Order Codes

Code	Description
F255CFR0H0	Compression, IP65, unrationalised
F255TFR0H0	Tension, IP65, unrationalised
F255UFR0H0	Bi-directional, IP65, unrationalised
F255CFR0HN	Compression, IP65, rationalised
F255TFR0HN	Tension, IP65, rationalised
F255UFR0HN	Bi-directional, IP65, rationalised
Change the C to a D for compression with stud fitting both ends.

Structural Stiffness

Range (kN)	Stiffness (N/m)
100 (N)	3.5 x 10⁶
200 (N)	7.1 x 10⁶
400 (N)	1.4 x 10⁷
800 (N)	2.8 x 10⁷
1.6	5.6 x 10⁷
3.2	1.1 x 10⁸
6.4	2.2 x 10⁸

Notes

AL = Applied load.
RL = Rated load.
Temperature coefficients apply over the compensated range.
The load must be applied directly through the central loading axis.

Connections

The loadcell is fitted with 2 metres of PVC insulated 4 core screened cable type 7-1-4C.

Excitation + = Red, Excitation – = Blue, Signal + = Yellow, Signal – = Green, Screen = Orange.

Reverse the signal connections to obtain a positive signal in tension mode. The screen is not connected to the loadcell body.

When this loadcell is rationalised the resistors are housed in a capsule located in the loadcell cable 100mm from the free end. Capsule dimensions are Ø10mm by 57mm.