The GS-500 is a single range instrument with a 500-0-500 micro-ampere direct current movement. Accuracy is 2% of range.
The center panel is brush-finished, anodized aluminum and the one-piece sides and bottom are painted steel. The meter is a nominal 3-1/2 inch unit with a taut-band movement. Dimension: 12x13x13cm. Wabash #GS-500 (left side of photo).
Forensics Lab Supply Number 3178500.
Formerly Grau-Hall Corporation dba Grau-Hall Scientific.
Purchase orders may be sent by email to staff @ grauhall.com or by FAX to 916 379 9639 or by mail to P. O. Box 279592, Sacramento, CA 95827-9592.
All products shipped from Wabash, Indiana.