Flowmaster 250 DL - Data Logger

• Portable
• Generates Reports
• Flowrates -Accuracy – 98%
• Ease of use
• No Mechanical Parts
• Not affected by debris in water
• No Ghost Readings
• Robust

Flowmaster 250DL, hydrant flow and pressure test instrument – Model 34-2005

Easy and simple to use everywhere.

The TSI Flowmaster provides the most reliable and accurate flow and pressure measurements. Invaluable for hydrant testing, pump testing, flushing and water main condition testing. Simply attach, switch on and take flow and pressure readings. Saves time and money.

Measures flow rates up to 3,000 lpm and pressures up to 25 bar. The electromagnetic sensor has no moving parts – measurement is not affected by debris in the water stream. Weighing only 12kg, the TSI Flowmaster has a convenient carry handle contributing to its overall ease use.

It's integrated data logger stores up to 360 hours of measurements that can be downloaded to a computer or laptop. Predefined reports and graphs can be printed.

Hydrant Test Sample:

How to Use the Flowmaster 250DL:

TSI Flowreporter Software:


The TSI Flowmaster 250 DL can be used in conjunction with TSI's Flowreporter software to create professional reports, in a simple, efficient and repeatable manner. Our software speeds up the process by automatically filling in repeated information along with simplifying the way you plot your results, directly from the flowmeter's data. TSI's expertly crafted platform enables users to speed up the entire process, from the initial test, down to the reporting and presenting stage. 



Type: Electromagnetic
Operating Range: 30 to 3,000 lpm, can be extended to 5,000 lpm
Accuracy: 30 to 750 lpm: ±15 lpm > 750 lpm: ± 2%

Digital readout of flow rate

4-digit backlit LCD display

Volume readings to 1,000,000 litres

Flow readings in LPM or in US GPM


Display of current flow rate

Display of total volume used

Power Supply: Internal battery 12V DC, 2.2 Ah
Up to 10 hours continuous operation External charging device included as standard. Mains charger is supplied with either UK, euro or USA style plug.

Operating temperature: -10 to +50 ºC
Weight: 12.5kg
Dimensions: 210 (H) x 240 (W) x 390 (L) mm
Housing: Solid and corrosion resistant LM25 aluminium
Colour: Red RAL 3020/natural aluminium


Sensor: Piezoresistive pressure transducer
Range: 0-25bar in 0.1bar increments
Accuracy: ± 1%
Readout: High brightness LED
Readings in BAR or PSI


Record 12 hours of flow and pressure data at 1 second recording interval

Upload data to laptop by USB

Auto logging feature whereby data logging starts and stops automatically according to flow rate

LED indication of logging in progress

Can also log directly to PC using USB cable supplied


FMSv4.5 software for file management and report preparation is supplied.

OPTIONS (extra charge)
TRANSPORT CASE (Model No. 34-2104)

Transport case with castor wheels and extension handle. Internal foam moulded to shape of Flowmaster and with cutouts for accessories. Weight 7kg.

ADAPTORS (Specify when ordering)
For UK:
2.5” BS Inst. M/F
For North America: 2.5” NH
For EU: 2.5” BSP or Storz 65, Storz B. Other adaptors such as Gost or Nor available on request
For Hose reels: 3⁄4” or 1” BSP