Stainless Steel Polished Rod Load Cell
 Weatherford's stainless steel polished rod load cell uses the latest sensor technology. It brings both accuracy and durability to the harsh environment of an oil well site. The instrument is constructed of 300 series stainless steel and is hermetically sealed (nitrogen gas filled). This design makes it completely immune to salt spray and unaffected by H2S. The sensor’s construction minimizes the adverse effects of impact loading and ensures long-term stability. It is also equipped with a lightning suppression circuit. Each of these sensors is thoroughly tested to meet performance specifications. Calibration is traceable to the National Institute of Standards Technology (NIST). To permit direct interchange with load cells in existing controllers, the stainless steel polished rod load cell may be ordered in several variations of connector style, capacity (10-, 15-, 30-, or 50- K), and output sensitivity.
Factory Mutual Approval
- FM Class I, II, III, Division 1 & 2, Groups A - G
- ATEX Directive: CE
 II 3 G
- EN500 21:1999 EEx mA II T4
Highlights
- Only hermetically sealed polished rod load cell on the market
- Rugged stainless steel housing
- Temperature compensated load measurement
Features
- Hermetically sealed/nitrogen gas filled
- Impervious to H2S and salt spray
- Harsh environment protection
- Direct replacement of all polished rod load cells
- Field proven sensor technology
- Lightning protection
- Many ranges available
- Lower cost
Stainless Steel Polished Rod Load Cell Technical Specifications
| Rated Capacity |
10-, 15-, 30-, or 50- K |
| Overload Safe |
200% full scale |
| Output Full Scale |
1.5 or 2.0 mV/V ±0.5% |
| Bridge Resistance |
800 Ohms ±5% input
700 Ohms ±1% output |
| Excitation Voltage |
20 V maximum, AC or DC |
| Non-Linearity |
<0.03% full scale, maximum |
| Hysteresis |
<0.03% full scale, maximum |
| Repeatability |
<0.02% full scale, maximum |
| Zero Offset |
±1% full scale |
| Operating Temperature Range |
-70°F to +190°F |
| Temperature Span |
Zero ±0.2%/100°F
Output ±0.15%/100°F |
| Insulation Resistance |
>500 Meg Ohms |
| Material |
300 series stainless steel |
| Hermetical Seal Test |
1.8 x 10-10 ATM |
| Certified Calibration |
N.I.S.T. traceable |
Ordering Information
| Part Number |
| PC8500-584-00 |
10-K lbs. capacity, 2.0-mV/V output sensitivity, and standard 6-pin Molex connector |
| PC8500-585-00 |
15-K lbs. capacity, 2.0-mV/V output sensitivity, and standard 6-pin Molex connector |
| PC8500-581-00 |
30-K lbs. capacity, 2.0-mV/V output sensitivity, and standard 6-pin Molex connector |
| PC8500-582-00 |
50-K lbs. capacity, 2.0-mV/V output sensitivity, and standard 6-pin Molex connector |
| Custom loads available upon request |
|
 |
