Micro Button Load Cell | CDFT

At a Glance

Description

Applied Measurements CDFT micro button load cell is designed for compression measurement applications where the absolute minimum of space is available for transducer mounting.

With capacities from 25N to 250N available and measuring just 9mm in diameter and 2.9mm in height, the CDFT is the smallest standard button load cell that we offer.  If you need to measure lower or higher forces, the CDFM3 miniature button load cell is available in capacities from 0-100N right up 0-20kN and is slightly larger at 30mm diameter and 12mm in height.

Applied Measurements CDFT micro button load cell is ideal for retro-fitment and is ideal to use in robotics and effectors, hoist and winch loads, micro-component assembly tools and machinery, keyboard button and telephone control and mechanical switches.

The CDFT has an in-line temperature compensation module which measures a slimline 12.7mm diameter and 69mm long. The module is the aluminium cylinder in the above images and can optionally be positioned further away from the CDFT. The module’s output cable is a Ø3.3mm black PVC type which will carry the measurement signal to the your monitoring or control equipment.

We can supply the CDFT micro button load cell with a wide range of transducer instrumentation such as digital indicators, intuitive panel meters, handheld digital readouts and wireless telemetry systems.

Technical Specifications

Rated Capacity	N	0-25, 0-50, 0-100, 0-200, 0-250
Operating Modes	Compression Only
Sensitivity (RO)	mV/V (±30% typical)	25N = 0.5 50N = 1.0 100N = 2.0 200N = 2.0 250N = 2.0
Zero Balance/Offset	±%/Rated Output	<1.0
Non-Linearity	±%/Rated Output (BFSL)	<0.25
Hysteresis	%/Rated Output	<0.25
Repeatability	%/Rated Output	<0.1
Temperature Effect on Zero	±%/Rated Output/ ˚C	<0.01
Temperature Effect on Sensitivity	±%/Applied Load/ ˚C	<0.02
Input Resistance	Ohms	1000 nominal
Output Resistance	Ohms	1000 nominal
Insulation Resistance	Megohms	>5000 @ 50Vdc
Excitation Voltage	Volts AC or DC	5 recommended (2-10 acceptable)
Operating Temperature Range	˚C	-40 to +125 (cell only)
Compensated Temperature Range	˚C	0 to +100
Storage Temperature Range	˚C	-40 to +125
Safe Overload	% of Rated Capacity	150
Ultimate Overload	% of Rated Capacity	300
Deflection @ Rated Capacity	mm	<0.02
Fundamental Resonant Frequency*	kHz	>4
IP Rating (Environmental Protection)		IP53
Weight	grams	~2 (excluding cable)
Fatigue Life		108 cycles typical (109 cycles on fatigue-rated version)
Cable Length (as standard)	metres	2 (1.5m to compensation module + 0.5m tail)
Cable Type		Ø1.35 screened PTFE from cell, Ø3.3 screened PVC from compensation module
Construction Materials		Stainless Steel
Resolution		1 part in 250,000 (with appropriate instrumentation)
*The resonant frequency is calculated with the body of the load cell attached to a large plate, ensuring that only the sensing element oscillates. This is vital to achieve the highest natural frequency and subsequent frequency response.

Product Dimensions

Wiring Details

Wire	Designation
Red	+ve excitation
Blue	-ve excitation
Green	+ve signal
Yellow	-ve signal
Screen	To ground - not connected to load cell body

Ordering Codes & Options

Core Product	Capacity (inc Engineering Units)	Cable Length (m)	Specials Code	Example Result
CDFT	25N	002	000	CDFT-25N-002-000
CDFT	50N	002	000	CDFT-50N-002-000
CDFT	100N	002	000	CDFT-100N-002-000
CDFT	200N	002	000	CDFT-200N-002-000
CDFT	250N	002	000	CDFT-250N-002-000