Digital Hydraulic Tester – Serviceman Plus (HPM4000)


The Serviceman Plus (HPM4000) digital hydraulic tester features extremely robust construction and an oil-resistant rubber coating to withstand impacts, vibration, dust, and moisture (protection class up to IP67) and is designed for use in particularly harsh conditions. This compact mobile tester measures pressure, temperature, flow rate, frequency, and speed in mobile and industrial hydraulic systems.

The unit is available with either two analog sensor inputs or a CAN interface for connecting up to three digital sensors. Even in low-light situations, measured values can still be read quickly and reliably from the multi-line, backlit LCD graphic display. Data can be conveniently saved to a removable nano USB stick or transferred through a USB interface to a PC for further analysis with SensoWin software.

 Serviceman Plus Features:

  • “Plug and play” automatic sensor recognition
  • Large back-lit display MIN/MAX memory and differential measurements
  • Increased memory capacity with a nano USB stick
  • USB interface to PC for convenient analysis and documentation via SensoWin software
  • Robust design with IP67 rated protection for extreme condition
  • Rear panel integrated support for free-standing operation
  • Scan rate: 1 ms


  • Pressure: PSI and bar (Pressure Transducer)
  • Temperature: Fahrenheit and Celsius
  • Volume Flow: US GPM and LPM (Flow Turbine)
  • Rotational Speed: RPM
  • Note: All sensors are sold separately.

Technical Data:

  • Display: Type: FSTN-LCD, graphical with LED background lighting. Visible area: 62mm x 62mm. Resolution: 130 x 130 pixels
  • Memory: Internal measure value memory: 1 measurement, approx. 15,000 data records (270,000 measure values ACT/MIN/MAX). USB memory stick: 1 GB supplied
  • Functions: Difference; addition; output; ACT; MIN; MAX; FS; TEMP display; battery charge; start-stop measurement
  • Interfaces: USB device: Online data transfer between device and PC via SensoWin software; measured value transfer: ACT/MIN/MAX, min. 5 mns; USB standard: 2.0, full speed; connection assembly: Micro USB socket, protected, type B. USB host: Connection of USB memory stick, max. 4 GB; recommended types: Delock USB 2.0 nano memory stick, Intenso Micro Line; USB standard: 2.0, full speed, max. 100 mA; connection assembly: Micro USB socket, protected, type B
  • Battery: Analog version: Type: Lithium-ion pack; 3.7 V DC/2250 mAh. Battery charging time with power supply: Approx. 3.5 hours. Battery discharge period: > 8 hours, with 2 sensors. CAN version: Type: Lithium-ion pack; 3.7 V DC/4550 mAh. Battery charging time with power supply: Approx. 7 hours Battery discharge period: > 8 hours, with 2 CANBUS sensors
  • Weight: 540 grams (1.19 lbs)
  • Dimensions: 96 x 172 x 54 mm (3.78″ x 6.77″ x 2.13″)
  • Operating Temperature: 0°C – 50°C (32°F – 122°F)
  • Storage Temperature: -25°C – 60°C (-13°F – 140°F)
  • Relative Humidity: <80%
  • Environmental Assessment: DIN EN 60068-2-32 (1 m free fall)
  • Protection Category (EN60529): Analog IP54, CAN IP67
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