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Modern pressure measurement equipment begins with practice-oriented instrument technology and correspondingly user-friendly evaluation and documentation software. What the users want is: to be able to install the measuring device on underground hydrants without connection cables or pressure hoses “flying” loose. For this reason, the DL 4 is fitted directly into the hydrant’s claw coupling using the valve key. Turn clockwise to screw in, and anti-clockwise to remove. Done. Now the DL 4 is also available in the variant with Storz-C coupling for direct connection to a pillar hydrant. An adapter system or threaded connection is available for use at other measuring points.
The information on the graphic display includes the current pressure, which is displayed so large that it can also be read easily in the installed position. In addition, the minimum and maximum measured values and the mean pressure can be called up. This allows changes in pressure to be recognised directly, without reading out the values.

There are sensors in the aluminium housing, which are concealed behind the “virtual” buttons. These can be operated with a magnet – i.e. without finger pressure. The magnet is located in the end cap of the plug or, optionally, in an external magnetic pen (for protection against operation by third parties). Thus, all of the operational control elements are absolutely sealed. Penetrating water and dirt don’t stand a chance. When it comes to the plug-in connection for communication and charging, we rely on the best quality available on the market.



  • Proven menu navigation with new operating concept using a magnet and Hall sensors (no membrane keys – no leaks)
  • Start measurements on site and read the results intermediately
  • Large graphic display showing the current measured value and statistical values
  • Pressure measuring range up to +25 bar, accurate to 5 mbar
  • Accuracy: 0.1% of the final value at 20 °C
  • Extremely robust and waterproof measuring device
  • PC software for programming and documentation
  • Screws directly into the claw coupling of underground hydrants or into pillar hydrants (variant Storz-C)

Technical data

Display LCD graphic display with 128 x 64 pixels; can be illuminated
Pressure range up to 25 bar
Resolution 5 mbar
Measurement error < 0.1% of the final value at 20 °C
Protection category IP68
Rechargeable battery Lithium ion battery
Rechargeable battery capacity Up to 6 months depending on the programming
Temperature range -15 °C to +50 °C
Interface USB

Device variants

keyboard_arrow_downDruckLogger 4

DruckLogger 4
Pressure measuring device for water network.
Measuring range up to 25 bar.
Accuracy better than 0,1% from end scale.
At pressure side with DIN hydrant screwing and ¼ inner thread.
Cap with magnet in order to operate the logger.

keyboard_arrow_downDruckLogger 4, Storz C

DruckLogger 4, Storz C
Pressure measuring device for water network.
Measuring range up to 16 bar. Accuracy better than 0,1% from end scale.
At pressure side with Storz C coupling (max. 16 bar) and ¼ internal thread.
Cap with magnet in order to operate the logger.


keyboard_arrow_downCharging accessory

Mains adapter 230V with outlet USB provides 5V DC
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4-Port-Hub, metal housing, USB 2.0
Data transfer- and charging divider for up to
4 pressure logger DL 4 at the same time.
With mains adapter 230 V and USB cable.

Please note:
You need a data transfer- and charging cable pressure
logger DL 4 USB for each DL 4.
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keyboard_arrow_downCarrying equipment

Case with foam insert DL
for up to 4 of pressure logger DL 4 or for up to 3 of hydrofones.
Size approx.: 420 x 325 x 178 mm
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Mounting device for pressure logger DL 4
With nut for valve key.
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Protection cap for the socket DL 4 with wire rope but without magnet
Protection against usage of third parties.
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House connection set water for DruckTest memo, DruckLogger 4
Art.: 262041 - connection hose memo/DL 4, length: 1 m
Art.: 262032 - Adapter 1" int. thread fits to Gardena
Art.: 262033 - Adapter 3/4" int. thread fits to Gardena
Art.: 262034 - Adapter 1/2" int. thread fits to Gardena
Art.: 262035 - Adapter 1/2" ext. thread fits to Gardena
Art.: 262036 - Adapter 3/8" int. thread for angle valve
Art.: 262037 - Adapter 1/4" ext. thread for drain valve
Art.: 262038 - Adapter M22 int. thread for diffusor
Art.: 262039 - Adapter M24 ext. thread for diffusor
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Software module DruckLogger 3/4 PC1 V3 for MS Windows 7/8/10
- licence for 1 workstation
- can be used with 32 and 64 bit operation systems
- software for easy documentation of measurements and tightness tests
- data base for administration of all measurements
- grafical visualisation and print out of all measurements
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