Vacuum Measurement & Control
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​Thermocouple Vacuum Gauge Tubes - DV-6 Series for Medium Vacuum

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​Note: You can click on the circles in the image below to learn more about the products that the DV-6 Series can be used with.

Teledyne Hastings, manufacturer of the original DV-4, DV-5, and DV-6 thermocouple vacuum gauge tubes, produces vacuum measurement equipment with exceptional stability, accuracy, and reliability under the most demanding conditions.

The Teledyne Hastings’ DV-6 series thermocouple vacuum gauge tube acts as a localized sensor which is then paired with a selection of meters or controllers to provide reliable, cost-effective measurements in diverse applications. The robust sensor gauge tube is easily installed into vacuum systems and when properly excited, generates a thermoelectric voltage to provide a vacuum pressure measurement based on gas density. The DV-6 thermocouple vacuum gauge tube fully compensates for temperature and rate of temperature change.

Thermocouple gauge tubes are calibrated on vacuum systems that contain N2 or Air, but can be used with other gases. Additionally, thermocouple gauges and their controllers can be recalibrated when a replacement thermocouple gauge tube is installed, following instructions in the manual. However, our DB-20 reference tube is available to confirm meter/controller performance. A complete line of installation accessories are also available to simplify the integration of our thermocouple gauge tubes into a variety of vacuum systems.  Our goal is to provide “one less thing to worry about”, when performance matters! 

With a wide range of meter, fitting, relay and output options, the DV-6 series provides a reliable pressure measurement in numerous industries and applications. ​

Applications and Industries



We have your solution
  • Select your meter/controller (see Table below)
  • Select your thermocouple vacuum gauge tube model (see Table below)
  • Place your order - Most parts in stock
Meter / Controller​​

​VT-6A ​CVT-26A ​DVT-6 DCVT-6 ​HPM 4/5/6 ​DAVC-6​
​Range ​1 mTorr - 1000 mTorr ​ ​
Display Reverse Motion Analog Needle ​ ​ ​ ​ ​Digital ​​ ​ Setpoint (High/Low) Indicators
​​Torr, mBar, PA ​
​+(15% Reading + 0.2 mTorr) max ​ ​
​Dimensions ​​​See Bulletin in Downloads Tab​ ​ ​ ​
​Output ​✓ ​✓ ​✓ ​✓
​Control Output or Relays
Serial Communications

Power 115 vac; 50/60 Hz current 
​90-240 vac; 47-63 Hz, 2W ​90-250 vac; 47-63 Hz, 5W
DC Input Requirements

4.5-5.3 VDC, 1.5W ​22-25 VDC, 5W 9V Battery​ 11-32 VDc 0.7 W​
Power Cable Length ​​6 Feet 
​ ​
None​ 1.5 m​
​Vacuum Sensor Cable Length ​8 Feet ​  - other lengths available
​ ​ ​
Extends to 13 Feet​ ​8 Feet - other lengths available
Weight 1.3 Lb. 1.5 Lb. ​0.5 Lb. ​0.7 Lb. ​4.2 oz.
​Cabinet Version (B) ​✓ ​✓ ​✓

​​All DV-6 Gauge Tubes have a yellow color band or label​
​Part Number Fitting ​Robust with Protective Cap ​RoHS
​DV-6M 1/8" NPT
1/8" NPT
1/8" NPT
1/8" NPT
​✓ ​✓
1/8" NPT
​DV-36-VCR 1/4" VCR

DV-6-KF-16 ​KF-16
DV-6-KF-25 KF-25
1/4" VCR

​Mini - CF

​1/4" VCR



P​roduct Bulletins

Product Ma​nuals

​Article Posts

Related Products

Part Number​Description
55-104​DB-20 100​0 mTorr Reference Tube
Digital VT Cables 8', 25' and custom lengthsCB-DVT-25.jpg
​CB-DCVT-LengthDigital CVT Cables 8', 25', and custom lengthsDCVT_CB-DCVT.jpg
​CB-RS232-RJ12​​Digital DVT Communication Cable
CB-DAVC-1.5MDAVC Cable, 1.5mCB-DAVC-1_5M.jpg
65-72B​Particle Drop Out Trap
65-724​Molecular Sieve Filter
55-3​​​8 feet extension cable for Analog meters/controllers- other lengths available
​Gauge Tube Cable for DV-36 (50C)
Gauge Tube for Cable for DV-36 (110C)
28-07-050​​Octal Female Socket
CB-HPM 4/5/6​HPM 4/5/6 Replacement Cable



DV-6 Vacuum Gauge shown on Furnace
What is a thermocouple gauge?
A thermocouple gauge is an indirect vacuum gauge that measure the thermal conductivity of gases in a vacuum system using a temperature sensing technique to determine the pressure.

How does a thermocouple vacuum gauge work?
A thermocouple gauge indirectly measures vacuum by measuring the millivolt signal produced in a thermocouple array that corresponds with temperature. An individual thermocouple consists of two dissimilar metals which are joined at a junction. At the junction, there will be a small voltage which is a function of temperature. During operation of the gauge tube, thermocouples are resistively heated inside the gauge tube’s housing. Since the wires connected to the thermocouples are exposed to the gas in the vacuum, thermal energy will be transferred away from the wires at a rate which is dependent on the number of collisions between the gas and the wires and thereby depends on the pressure inside the tube.

W​hat is a vacuum gauge tube?
A vacuum gauge tube is a precision thermal sensing device designed to provide accurate measurement of vacuum. The gauge tube itself is the component which is attached to the vacuum system. Also referred to as a “thermocouple gauge tube” or just “tube”.