The Mustang® Joule-Thomson Heated Regulator (MJTHR) is a four-stage pressure regulator designed to compensate for Joule-Thomson cooling during sample extraction. With a ratio controlled multi-piston design, the MJTR ensures the first three stages are always functional, even with fluctuations to inlet pressure.

A MJTHR, located downstream of a sample probe, permits a 4-stage pressure reduction without distorting the composition of a vapor sample. Gas sample integrity is maintained by heating it to at least 30ºF above the expected hydrocarbon dew point.

When used in combination with insertion probes, the MJTHR is the most practical means for conforming to the API 14.1 and GPA 2166 standards.

  • Analytically Accurate® Technology
  • ATEX/IECEx Certified Option
  • cETLus Certified Option
  • Offsets Joule-Thomson cooling
  • Provides continuous gas sample conditioning in any process industry
  • Protects analyzers & helps preserve sample integrity
  • Proportional temperature control
  • Thermal cutoff
  • Contact us to determine heated and supercritical application needs with our Equations of State software


Maximum Allowable Working Pressure6000 psig (414 bar)
Temperature Range-15ºF (-26ºC) to 300ºF (149ºF)
Outlet pressure range0-10, 0-25, 0-50, 0-100, 0-250, or 0-500 psig
(0-0.69, 0-1.72, 0-3.45, 0-6.89, 0-17.24, or 0-34.47 bar)
Thermal cut-off
Normally opens at 230ºF (110ºC) (other ranges available upon request)
Internal volume
5 cc
Cv Coefficient
Port sizes
1/4” female NPT
Conduit connection
3/4” female NPT
Electrical enclosure classification
Class 1, Div 1 & 2, Groups B, C, D
Power rating options
115 VAC, 200 Watts, 50/60 Hz, ± 10%
208 VAC, 200 Watts, 50/60 Hz, ± 10%
230 VAC, 200 Watts, 50/60 Hz, ± 10%
24 VDC, 140 Watts
Wetted materials
Machined parts: 316 stainless steel/NACE compliant
All other metal parts: stainless steel/NACE compliant
O-ring: James Walker.
Optional Viton®/Kalrez (other materials available upon request)