This is an NBS-type four terminal 1 ohm resistance standard. It is marked with both the Rubicon and the Honeywell brand names. The resistor was included in a box of standards that came out of the Leeds & Northrup calibration laboratory.

We were unable to determine any information regarding specifications for this standard resistor, however there was some information on the attached labels.

Calibration label stamped ‘LAB. FILE, DO NOT REMOVE’. Dymo tape label with value 1.00099. Date issued label 3 May 1967. Serial number 105171

The resistor was measured with a Fluke 8060 meter just to confirm that it was close to the nominal stated value, and that it had not been damaged. The standard is oil-immersed and has a rubber adhesive patch placed over the thermometer access port to stem leakage during transport…

Photo set 1687
***MPN
***OEM Honeywell
***SKU*** 23105

This is an NBS-type four terminal resistance standard. Cosmetic condition is very good, however one of the four clamp screws is missing.

Two values each were given in the L&N specification sheet on the 4015-B Series resistors (both current and amperage) – possibly one value was for the resistor used dry, the other for an oil-immersed resistor? I give both values in the specs I copied below. This resistor is older than the B-series so the specifications may not be accurate.

10 ohm – (model 4025?), serial number 659194, 0.1 (0.3) amps, 0.1 (1) watts, nominal adjusted value 0.003%, measured value 0.0001%. Last calibrated in 1958 at L&N – stated value 10.0049. Also a Dymo label with the figure 10.0063.

The standard is oil-immersed and has a rubber adhesive patch placed over the thermometer access port to stem leakage during transport. There is no data or calibration label on the resistor, but it was included in a box of standards that came from the calibration laboratory at Leeds & Northrup. The resistor was measured with a Fluke 8060 meter just to confirm that it was close to the nominal stated value, and that it had not been damaged..

Photo set 1682.

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***MPN
***OEM Leeds & Northrup
***SKU*** 23100