the HD1 Pro Plus leak detector has arrived

We proudly present the HD1 MK3 PRO+, the next-generation portable helium leak detector featuring signifi cant new enhancements

The HD1 series has consistently evolved in performance and usability, from the battery-powered MK1 to the dual-powered MK2. The HD1 MK3 Pro+ is our most advanced model yet – an innovative, portable helium leak detector delivering major performance improvements.

portable & power flexible

Portable

  • Easily transported anywhere, offering convenience and adaptability
  • Optimised to be energy and resource efficient
  • Compact, space-conscious design

Power Source

  • Enhanced technology reduces energy consumption, extending battery life
  • Two fully charged lithium-ion batteries provide up to 14–15 hours of continuous leak testing, depending on conditions and battery age
  • Can HOT SWAP batteries allowing 24/7 leak testing capabilities
  • For long-term monitoring or production use, HD1 Pro+ can be mains powered

Power Source Protection

  • Built-in protection against incorrect power supply voltages up to 24V DC

high stability & performance

High Stability

  • High Stability
  • Exceptional accuracy and repeatability with upgraded performance
  • Enhanced electronics with advanced technology

Greater Dynamic Range

  • From 0.1 to 3000 (scf/year 1% He & 99% N2)
  • to 3000ppm He
  • 2×10-6 to 1×10-1mbl/sec and atm cc/sec (1% He & 99% N2)
  • Allowing detection of small leaks to large leaks without any intervention by the operator

Fast Helium Clean Up

  • Removes high helium background in the test area for continued small-leak detection
  • No background recovery time needed after extended helium exposure
  • Sensitivity and accuracy are unaffected during operation

intelligent automation & range control

Auto Ranging – Game Changing Automation

  • Automatically selects the correct leak range from High (HI) to Low (LO) sensitivity
  • Eliminates human error from incorrect range selection
  • Units supported: scf/year, ppm, mbl/sec, atm cc/sec

Limiting Range Hold

  • Choose from three sensitivity ranges – filters out readings below the threshold until a leak surpasses it
  • Example: If 1×10⁻⁴ mbl/sec is selected, the instrument ignores leaks in the 1×10⁻⁶ and 1×10⁻⁵ ranges

Decimal Point Change

  • Operator can remove the decimal point and display a whole number
  • 0.1ppm to 1ppm
  • 0.1scf/year to 1scf/year

alerts, interface & communication

Volume Threshold Set Point

  • Operator-set audio threshold triggers an alarm when the leak exceeds the set point (in scf/year or ppm)

Intuitive User Interface Displaying:

  • Overrange
  • Probe blocked (with debris or water) – operator action required

Communication via 9pin D Connector On Rear Panel

  • Output for chart recorder or plc
  • 4 to 20ma and 0-5volts dc
  • Supports remote relay control for on/off operation and ready mode activation

built for harsh environments

Built-In Harness Support (included as standard)

  • Newly designed Vaseco harness (patent pending) built for harsh environments
  • Ergonomic design evenly distributes weight
  • Ensures secure support for the HD1 Pro+
  • Reduces operator fatigue
  • Protects valuable equipment during prolonged use