

Gauge Isolators & Throttle Master Needle Valves
Marquest Scientific Tuff Guard Gauge Isolators
Marquest Scientific’s new line of gauge and instrument isolators are engineered to provide total protection and isolation of corrosive & ultra pure fluids while offering a design with the most rugged features in the industry. Stainless steel reinforcement of the instrument connection to prevent fracturing associated with metal to plastic threads. This stainless steel reinforcing component is integrally molded into the Upper Chamber to completely surround the full length of the female thread and is for all practical purposes “unbreakable”.

Sign up for our mailing list to stay informed and up to date with our latest news and products!
(905) 832 – 0600
2175-A Teston Road
Maple, Ontario
L6A 1T3
(780) 451 – 0238
24790 – 117 Avenue
Acheson, Alberta
T7X 6C2
(604) 882 – 1564
9511 – 194A Street
Surrey, British Columbia
V4N 4G4
(306) 955 – 6005
3926 Arthur Rose Avenue Saskatoon, Saskatchewan
S7P 0C9
(450) 687 – 2721
2750 Rue Bernard-Lefebvre
Laval, Quebec
H7C 0A5






















