Length Reference Bar
SKU
1.5LRB-1050MM
The 1.5LRB-1050MM consists of a single 1050 mm length of our Invar tubing outfitted with two permanently mounted, 1.5INV magnetic SMR nests for a 1.5" SMR. (SMRs not included) Also included are two 15199 Invar system "feet", positionable at your discretion, and a high impact plastic case.
Invar is an excellent material for this application due to its extreme stability over a wide temperature range. Take a look at the table below to see the stability of Invar reference bars compared with other materials.
Deviation in Length of 80" Reference Bar
|
|
Temperature °F | Invar |
40° | -0.0015" |
50° | -0.0010" |
60° | -0.0004" |
68° (std) | ±0.0000" |
70° | +0.0001" |
80° | +0.0007" |
90° | +0.0012" |
Note: If you don't need NIST-traceability of a given dimension, but just require a consistent length for system checks, you may want to build your own reference bar using our Invar system and related targets.
Any 1.5" SMR
Case | High impact plastic |
---|---|
Length Accuracy | NIST-traceable certification to ±0.0001" (0.003 mm) |