The HDI 3300 Temperature Gauge System is an intrinsically safe, certified, solid-state electronic temperature gauge routinely used for monitoring high pressure nitrogen pumping, geothermal and mud based drilling, bulk liquid storage, well control manifolds, and flare stacks. This model offers temperature ranges up to 150 Celsius or 300 Fahrenheit with 0.5% accuracy of full scale. Each gauge system is comprised of a Gauge Display, Inline Cable, and Sensor Assembly allowing the display to be close or far from the point of measurement. All HDI Gauges provide safety, accuracy, reliability, and low maintenance for the user.


  • Battery powered
  • Field repairable system
  • Low battery indicator
  • -50 to 150 celsius; -50 to 300 fahrenheit
  • 0.1 degree resolution
  • 2” Male NPT, 2” 1502, 2” 2202, or flanged connections
  • 4-20mA or 0-1 volt output available
  • Solid state platform; no fluids or moving parts
  • Analog bar graph w/ divided scale
  • Simple interface for calibration
  • Verify temperatures with a solid state RTD
  • Toggle between fahrenheit and celsius


  • 4-20mA output (additional barrier required)
  • 4-20mA input (non-certified option)
  • Externally powered, 12VDC or 24VDC required (non-certified option)
  • Backlight, 12VDC or 24VDC required (non-certified option)
  • 0-1 volt output
  • Slave, secondary displays available


  • CSA: Intrinsically Safe Class 1, Division 1, Groups A, B, C and D
  • ATEX: optional, II 1 G, Ex ia IIC T4

Tech Files:


1000B:2000B:2400:3300 Battery Replacement




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7240 Brittmoore Rd., Suite # 119,
Houston, TX 77041

P: 713-688-8555
After Hours Telephone: 713-819-6103
Joe Colotta: 713-819-6103
Chris Colotta: 832-458-9346
Joseph Ebenezer: 713-446-2212
F: 713-688-2228