At a Glance
- Capacities: 300kg up to 750kg
- Output: 2mV/V
- Environmental Protection: IP67
- High Accuracy: <±0.03%/RC
- Integral Overload Stop
- ATEX Certificate: EEx ia IIC T4
- Dual Cantilever Design
- Designed for Low Range Measurement Applications – Ideal in Weighing Scales
- Suitable for Industrial Environments
- Save on Installation Time – Ideal for Retrofitting
- Lightweight & Low Cost for Price Sensitive Applications
- High Accuracy Guaranteed – Dual Cantilever Design
- Customised Versions to Suit Your Specific Application
- Immersion Protection up to 1m on Request – Humid or Flood Risk Locations
Description
Applied Measurements OBUH low profile moment compensated load cell is designed for use in weighing scales and a wide selection of 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 moment compensated load cell uses a dual cantilever beam design which makes them insensitive to bending moments and also offers extremely high accuracy and stability, while aluminium construction ensures light weight and low cost.
Customised single point moment compensated load cell versions 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
All dimensions are in mm
Model | Capacity (kg) | A | B | C | D | F | G | H | L | Q | V | X | J | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
OBUH | 300, 500, 750 | 191 | 76.2 | 75 | 111 | 125 | 25 | 60 | 33 | 40 | - | 3 | M8x1.25 - 15 deep | 2 |
Wiring Details
| Wire | Designation |
|---|---|
| Red | +ve excitation |
| Black | -ve excitation |
| Green | +ve signal |
| White | -ve signal |
| Blue | +ve sense |
| Brown | -ve sense |
| 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 |
|---|---|---|---|---|
| OBUH | 300kg | 3 | 000 | OBUH-300kg-003-000 |
| OBUH | 500kg | 3 | 000 | OBUH-500kg-003-000 |
| OBUH | 750kg | 3 | 000 | OBUH-750kg-003-000 |
Case Studies
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.
