Teledyne Hastings DV-4D thermocouple vacuum gauge tubes have an extra strong housing and can measure pressure between 0.01 and 20 Torr (10 to 20,000 millitorr).
- Measures in millitorr
- Absolute vacuum reference
- Millivolt output
Hastings DV-4D Sensor Features:
- Hastings DV-4D vacuum sensors are calibrated for nitrogen or air, but conversion factors for other gases are available
- Teledyne Hastings tubes are matched and interchangeable without calibration adjustments
- The DV-4D thermocouple tubes are for use with Teledyne Hasting Digital and Analog VT-6 thermocouple gauge controllers
- Vacuum Interface: 1/8 inch male NPT vacuum fitting
Applications: Glove boxes, cryogenics, vacuum furnaces, pharmaceutical production, freeze drying, agricultural processes, air conditioning, thermal food containers, plasma coating, HVAC, accelerators, and appliance manufacturing.
DigiVac also offers these Teledyne Hastings Thermocouple Sensors:
- Hastings DV-6R Vacuum Tube | .001 to 1 Torr ( 1 to 1000 millitorr) order here
- Hastings DV-6M Vacuum Sensor | .001 to 1 Torr (1 to 1000 mTorr) order here
How Thermocouple Technology Works
Thermocouple sensors (thermal conductivity gauges) rely on the fact that the ability of a gas to conduct heat decreases with pressure. In this type of gauge, a wire filament is heated by running current through it. A thermocouple or Resistance Temperature Detector (RTD) can then be used to measure the temperature of the filament.
This temperature is dependent on the rate at which the filament loses heat to the surrounding gas, and therefore on the thermal conductivity. A common variant is the Pirani gauge which uses a single platinum filament as both the heated element and RTD.