Description
Eppley Laboratory Cat No. 100 Weston Standard Cell 1.018V EMF 500 Ohm
The Eppley Laboratory Cat No. 100 is a Weston saturated standard cell — a precision electrochemical voltage reference that maintains a highly stable EMF of approximately 1.018 volts. It is designated a low temperature coefficient standard of electromotive force, meaning its output voltage varies only minimally with ambient temperature changes, making it suitable as a primary reference standard in metrology and precision electrical measurement work.
Specifications & What's Included
- Manufacturer: The Eppley Laboratory, Inc., Newport, R.I., USA
- Catalog Number: Cat. No. 100
- Serial Number: 767611 (see label)
- Type: Weston Saturated Standard Cell — Low Temperature Coefficient Standard of E.M.F.
- Nominal EMF: 1.018 V
- Internal Resistance: Not over 500 Ohms
- Terminals: Two knurled binding posts (positive and negative) on base
- Housing: Black molded case on an integral base platform
- Made in U.S.A.
Applications
Weston standard cells like the Eppley Cat No. 100 are classic primary voltage reference standards used in precision electrical metrology. They provide a chemically stable, reproducible EMF that serves as a known reference against which potentiometers, electrometers, and other high-accuracy instruments are calibrated. The Eppley Laboratory, founded in Newport, Rhode Island, was one of the premier American manufacturers of standard cells and radiometric instruments throughout much of the 20th century, supplying reference standards to national laboratories, university physics departments, and industrial calibration facilities. Saturated Weston cells produce a nominal 1.01832 V at 20°C and were the internationally accepted voltage reference standard prior to the adoption of the Josephson junction voltage standard in the 1970s and 1980s. They remain in use today among metrologists, vintage instrument collectors, and laboratories maintaining legacy calibration traceability. Because standard cells are sensitive to vibration, shock, and temperature extremes, they must be handled with care and allowed to thermally stabilize before use.
This Eppley Laboratory Cat No. 100 Weston Standard Cell has been inspected and is in good used condition. The black molded housing is intact and shows only light surface dust consistent with storage; no cracks, chips, or damage are visible. Both binding post terminals are present and appear intact. The unit was not bench-tested at our facility but came from a working laboratory environment where it was previously in use. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
Eppley Laboratory |
Model: |
Cat No. 100 |
MPN: |
100 |
Type: |
Weston Standard Cell / EMF Voltage Reference Standard |
SKU: |
29417 |
Output Voltage: |
1.018 V |
Internal Resistance: |
Not over 500 Ohms |
Temperature Coefficient: |
Low Temperature Coefficient Standard of E.M.F. |
Seller Notes: |
Standard cell unit only; no additional accessories observed. |
Country/Region of Manufacture: |
United States |
Form Factor: |
Benchtop / Freestanding |
Manufacturer Location: |
Newport, R.I. |
Condition Notes: |
This Eppley Laboratory Cat No. 100 Weston Standard Cell is in good used condition. Housing is intact with light storage dust; both terminals present. Not bench-tested here; pulled from a working lab environment. Contact us with any questions. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |
