HOUSTON'S STOCKING DISTRIBUTOR OF PNEUMATIC VALVES AND FITTINGS

SPAN

SPAN gauges

In 1970 SPAN's founder, Leo Whitson, began making the first American-made liquid-filled gauges for the oil patch. Now, the Thuemling Instrument Group carries on the family-owned tradition, remaing committed to supplying the best liquid filled gauges in the industry.

SPAN gauges offer unique features:

  • Tough, corrosion-resistant zytel nylon case with removable bezel
  • Uniform appearance for all SPAN 2-1/2", 3-1/2", and 4-1/2" stem and panel mount cases
  • Internal "breathing diaphragm" which eliminates the need for an air bubble in the mid-range of the gauge
  • Compensation for changes in internal case pressure caused by fluctuations in ambient temperature
  • Internal diaphragm seal prevents freezing, clogging, and corrosion
  • Non-yellowing glycerine fill