Welcome to our new site, if you can’t find what you’re looking for please get in touch via our contact us page.

Vacuum gauges – portable

Bullseye portable precision vacuum gauges present a new level in portable vacuum measurement. With robust gauges and rugged control units it offers unrivalled flexibility and connectivity. Bullseye Bluetooth-enabled gauges allow monitoring from mobile devices (Android or Apple), alarm settings and the documenting of vacuum data. This lightweight unit is easy to use in the field for on-site measuring but is equally useful as a laboratory or test vacuum gauge. Bullseye precision gauges combine portability, versatility as well as documenting and visual analysis capabilities all in a single instrument. The back-lit LCD display shows the vacuum level numerically of in as a graph. Settings can be easily changed with the front push button control.  

Features – general

  • Portable, compact and precise
  • Rugged control unit and robust vacuum sensors
  • Field calibration routines
  • Stand and magnetic hook for hands-free operation
  • Vacuum graphing for leaks, pump down, outgassing and stable systems
  • Unique, patented vacuum analytics
  • Long battery life – up to 140/70 hours (Pirani/Thermocouple) or via micro-USB power connection
  • Choice of four different models

Features – Bluetooth

  • Direct monitoring or on Android or Apple device
  • Remote monitoring from your desk – up to 30 metres range
  • Email vacuum data to document leaks, pump down and performance

Bullseye gauges are available with a choice of vacuum sensors:

  • Pirani sensor
    • Increased accuracy over a smaller range
    • Increased impact resistance
    • Lower power consumption
  • Thermocouple sensor
    • Readily interchangeable
    • Covers a wider range of vacuum

Application examples

  • Testing of electron microscopes
  • Testing of EM preparation instruments, e.g. vacuum coaters, plasma cleaners, cryogenic instruments etc.
  • Performance testing of laboratory vacuum equipment
  • Testing and checking  rotary, scroll and diaphragm pumps
  • Field testing of vacuum in transformers and HVAC equipment
  • Checking installed vacuum lines
  • Testing vacuum assemblies
  • Continuous monitoring of vacuum equipment


Bullseye Pirani-BT

Bullseye TC

Bullseye TC-BT

Product #    1/8”NPT




Vacuum sensor



Vacuum range

1.3 x 10E-4 to 100mbar

1.3 x 10E-4 to 1050mbar


Torr, mbar, bar, kPa, Pa, PSI, inches of Hg, mm Hg, millitorr, microns, inches of H20, mm of H2O

Torr, mbar, bar, kPa, Pa, PSI, inches of Hg, mm Hg, millitorr, microns, inches of H20, mm of H2O


0.050-30mbar ± 10%

< 0.01mbar ± 0.002 mbar
0.01-5mbar ± 15%
250-1050mbar ± 25%

Vacuum connection

1/8” NPT male
KF25 flange

1/8” NPT male
KF25 flange

Vacuum reference




Digital, LDC, back-lit

Digital, LCD, back-lit

Bluetooth enabled






4 x AA alkaline and micro-USB

4 x AA alkaline and micro-USB

Battery life

Up to 140 hours

Up to 70 hours

Gauge connection cord

3mtr, straight cable

2mtr, coiled cable


160 x 92 x 40mm

160 x 92 x 40mm




CE certified



Rohs compliant



Bullseye gauges include instant conversion between 12 different vacuum units –  ideal if vacuum performance needs to be checked on older or foreign equipment. Units converted are: Torr, mbar, bar, kPa, Pa, PSI, inches of Hg, mm Hg, millitorr, microns, inches of H20, mm of H2O. 

On stationary vacuum equipment, the Bullseye Bluetooth enabled precision gauge is ideal for replacing older equipment and gives instant remote monitoring and data storage on mobile devices.  In manufacturing environments, technicians can instantly check and document performance of vacuum assemblies and equipment.

Ordering information: