“Residual Resistivity Ratio” measurement results have been certified for several vendors with
a 3-week turnaround time. We measure RRR from 30 to 1000 with sample sizes of the order
2 x 2 x 100 mm. RRR is defined as:
RRR Measurements
RRR=
“Residual Resistivity Ratio”
Resistivity at 300K
Resistivity at  4.2K
Contact us for more information on testing of your samples.

1-517-999-3475
info@niowaveinc.com
Products & Services
Niobium &
Copper
Microwave
Structures
Chemical
Etching &
Cleanroom
Processing
Accelerating
Equipment
RRR
Measurements
Niowave, Inc.
1012 N Walnut St.
Lansing, MI 48906
Tel. (517)999-3475
Fax (517)999-3626
info@niowaveinc.com