ALF317 Cylindrical Force Sensor
High performance fatigue rated cylindrical loadcell
Key features
- Full load range: 5kN, 10kN, 25kN, 50kN, 100kN, 250kN, 500kN, 1MN
- Non-lin./hysteresis: 0.05/0.1% RL
- Good output symmetry
- High structural load limit
- Fatigue rated
- Sealed to IP65
About the ALF317 Cylindrical Force Sensor
The ALF317 is a high performance cylindrical loadcell offering a high degree of output symmetry in compression and tension. A high slenderness ratio strain section improves all round performance compared to the older design ALF204. New thread sizes are employed offering more economic sizing of rod end bearings and improved availability. Altheris can supply suitable rod ends.
The industry standard fatigue rated loadcell has traditionally been the pancake loadcell, our ALF254 is a typical example. By restricting the nominal output to a safe strain region the cylindrical loadcell offers the same number of full load reverse cycles as a minimum life expectancy. The cylindrical form offers the advantage of a reduced diameter, often advantageous in actuator applications. Adaptors are not required which are costly and add mechanical interfaces to the load train assembly.
We are happy to design variants of this loadcell to meet your specific requirements. Versions can be manufactured for fully compensated operation up to +250°C. Please consult our engineering department.
All standard ranges are manufactured in stainless steel.
Notes
1. AL = Applied load. 3. Temperature coefficients apply over the compensated range.
2. RL = Rated load. 4. The load must be applied directly through the central loading axis.
5. AO = Average of tension and compression outputs for full load.
Connections
The ranges above 0.5tonne are fitted with 2 metres of PVC insulated 4 core screened cable type 16-2-4C or a 4 pin Binder 723 series chassis plug. The 0.5tonne range is fitted with 2 metres of PVC insulated 4 core screened cable type 7-2-4C, the connector option is not available on this range.
Excitation + = Red or pin 1 Signal + = Yellow or pin 3 Screen = Orange
Excitation - = Blue or pin 2 Signal - = Green or pin 4
Reverse the signal connections to obtain a positive signal in tension mode. The screen is not connected to the loadcell body.
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Not exactly what you’re looking for? We offer standard sensors but can also help you with a tailor-made sensor or a complete measuring solution. Please contact us for advice or budgetary pricing.
Talk to an expertTechnical Specifications
| Specification | Value |
|---|---|
| Bridge resistance | 700 Ω |
| Creep - 20 minutes | ±0.05% AL |
| Excitation voltage - maximum | 20V |
| Excitation voltage - recommended | 10V |
| Fatigue life | 10^8 RL cycles |
| Hysteresis | ±0.1% RL |
| Insulation resistance - minimum at 50vdc | 500MΩ |
| Load direction | Tension, compression, bi-directional |
| Measurement range | 5kN, 10kN, 25kN, 50kN, 100kN, 250kN, 500kN, 1MN |
| Non-linearity - terminal | ±0.05% RL |
| Output symmetry | ±0.5% AO |
| Overload - safe | 50% RL |
| Overload - ultimate | 200% RL |
| Rated output - nominal | 1.2mV/V |
| Rated output - rationalised | 1.0mV/V |
| Rationalisation tolerance (applies to single direction calibrations) | ±0.1% RL |
| Repeatability | ±0.02% RL |
| Sealing | IP65 |
| Temperature effect on rated output per °c | ±0.005% AL |
| Temperature effect on zero load output per °c | ±0.01% RL |
| Temperature range - compensated | -10 to +50°C |
| Temperature range - safe | -10 to +80°C |
| Zero load output | ±4% RL |
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