Micro Button Load Cell | CDFT
Sub-Miniature, Accurate and Measuring Only 2.9mm in Height! 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 |
