At a Glance
- Capacities: 0-250g up to 0-40kg
- Output: 2mV/V
- Environmental Protection: IP65 (2kg and below)
- Environmental Protection: IP67 (3kg and above)
- High Accuracy: <±0.03%/RC
- Customised Versions Available
- ATEX Certificate: EEx ia IIC T4
- Designed for Low Range Measurement Applications
- Ideal in Weighing Scales
- Suitable for Industrial Environments
- Ideal for Retrofitting
- Lightweight & Low Cost
- High Accuracy Guaranteed
- Customised Versions to Suit Your Application
- Immersion Protection up to 1m on Request
Description
Applied Measurements low profile single point platform load cell OBUG is designed for use in weighing scales and a wide selection of low range force measurement applications such as manufacturing, testing, research and development. It is primarily designed for compression measurements, but it can also measure tension loads, or it can be used bi-directionally.
The dual cantilever design of the single point platform load cell makes them insensitive to bending moments and also offers extremely high accuracy and stability, while aluminium construction ensures light weight and low cost.
Applied Measurements can provide customised versions of the single point platform load cell with dimensions and fixings to allow direct retro-fitment in place of obsolete products or to suit specific applications are available on request.
Technical Specifications
| CHARACTERISTICS | OBUG | OBUG | OBUC | UNITS |
|---|---|---|---|---|
| Rated Capacity (RC) | 0-0.25, 0-0.5, 0-1, 0-2 | 0-3, 0-5, 0-10, 0-15, 0-20, 0-30, 0-40 | 0-10, 0-15, 0-20, 0-30, 0-50, 0-100, 0-200 | kgf |
| Operating Modes | Compression only | |||
| Sensitivity (RO) | 1.5 nominal | 2±10% | 2±10% | mV/V |
| Maximum Platform Dimensions | 200 x 200 | 350 x 350 | 400 x 400 | mm |
| Zero Balance/Offset | <1 | <1 | <10 | ±%/Rated Output |
| Creep (30 mins) | <0.08 | <0.03 | ±%/Rated Capacity | |
| Non-Linearity | <0.03 | ±%/Rated Capacity | ||
| Hysteresis | <0.02 | %/Rated Capacity | ||
| Repeatability | <0.02 | ±%/Rated Capacity | ||
| Temperature Effect on Zero | <0.005 | <0.002 | <0.006 | ±%/Rated Capacity/˚C |
| Temperature Effect on Sensitivity | <0.015 | <0.002 | <0.015 | ±%/Applied Load/˚C |
| Effect of Eccentricity | <0.015 | <0.006 | ±%/Rated Capacity/cm | |
| Input Resistance | 400 nominal | Ohms | ||
| Output Resistance | 350 nominal | Ohms | ||
| Insulation Resistance | >2000 @ 50Vdc | Megohms | ||
| Excitation Voltage | 10 recommended (2-15 acceptable) | Volts AC or DC | ||
| Operating Temperature Range | -20 to +70 | ˚C | ||
| Compensated Temperature Range | -10 to +40 | ˚C | ||
| Storage Temperature Range | -20 to +70 | ˚C | ||
| Safe Overload | 150 | % of Rated Capacity | ||
| Ultimate Overload | 300 | % of Rated Capacity | ||
| Deflection @ Rated Capacity | <0.5 nominal | mm | ||
| Resonant Frequency | Consult Sales Team | |||
| IP Rating (Environmental Protection) | IP65: 2kg and below | IP67: 3kg and above | |||
| Weight (excluding cable) | See dimension table | |||
| Fatigue Life | Consult Sales | |||
| Cable Length (as standard) | 0.5 | 0.4 | 3 | metres |
| Cable Type | 4 core screened, PVC sheath | 4 core screened, PVC sheath, | 6 core screened, PVC sheath, | |
| Construction | Aluminium Alloy | |||
| Resolution | 1 part in 250,000 (with appropriate instrumentation) | |||
Product Dimensions
Capacity (kg) | A | B | C | D | F | G | H | L | Q | V | X | J | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0,25, 0.5, 1, 2 | 70 | 15 | 22 | 46 | 58 | - | 7 | 6 | 12 | - | 0.5 | M3x0.5 - 22 deep | 0.07 |
3, 5, 10, 15, 20, 30 | 130 | 25.4 | 22 | 80 | 106 | - | 15 | 12 | 25 | - | 0.4 | M6x1 - 22 deep | 0.20 |
40 | 130 | 30 | 22 | 80 | 106 | - | 15 | 12 | 25 | - | 0.4 | M6x1 - 22 deep | 0.24 |
All dimensions are in mm
Wiring Details (Capacities of 2kg and Lower)
| Wire | Designation |
|---|---|
| Red | +ve excitation |
| Blue | -ve excitation |
| Green | +ve signal |
| Yellow | -ve signal |
| Screen | To ground – not connected to load cell body |
Wiring Details (Capacities of 3kg to 40kg)
| Wire | Designation |
|---|---|
| Red | +ve excitation |
| Black | -ve excitation |
| Green | +ve signal |
| White | -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 |
|---|---|---|---|---|
| OBUG | 0.25kg | 0.5 | 000 | OBUG-0.25kg-0.5-000 |
| OBUG | 0.5kg | 0.5 | 000 | OBUG-0.5kg-0.5-000 |
| OBUG | 1kg | 0.5 | 000 | OBUG-1kg-0.5-000 |
| OBUG | 2kg | 0.5 | 000 | OBUG-2kg-0.5-000 |
| OBUG | 3kg | 0.4 | 000 | OBUG-3kg-0.4-000 |
| OBUG | 5kg | 0.4 | 000 | OBUG-5kg-0.4-000 |
| OBUG | 10kg | 0.4 | 000 | OBUG-10kg-0.4-000 |
| OBUG | 15kg | 0.4 | 000 | OBUG-15kg-0.4-000 |
| OBUG | 20kg | 0.4 | 000 | OBUG-20kg-0.4-000 |
| OBUG | 30kg | 0.4 | 000 | OBUG-30kg-0.4-000 |
| OBUG | 40kg | 0.4 | 000 | OBUG-40kg-0.4-000 |
Published Sensor Application Articles
Below is a published sensor application paper that shows you how the OBUG platform load cell could be used in a specific application. See our published sensor application articles page for many more.
An experimental investigation of tsunami forces on coastal structures
Lloyd, TO; (2016) An experimental investigation of tsunami forces on coastal structures. Doctoral thesis, UCL (University College London). Available as open access.
Case Studies
How to Improve Aerodynamics with our Single Point Load Cells and Digital Indicators
The Scale Wind Tunnel uses two single point load cells and Intuitive2-L digital indicators enabling students to test the aerodynamics of scale models. Read how they did it.
Single Point Load Cells Help Farmers Balance the Scales
The Challenge – Design a weighing system to accurately measure the weight of birds maximising poultry farming profitability. Poultry farmers need to accurately weigh the birds to ensure they meet the correct specification and adjust the bird feed mix accordingly.
