The DHM 4 Series Digital Hydraulic Multimeter accurately Measure flow, pressure, peak  pressure, temperature, power and volumetric efficiency.
The tester comprises a turbine  flow block and a large easy to read digital display which indicates flow, temperature and  pressure.
The tester has a built-in loading valve to simulate the working pressure during normal machine operation. The built-in safety discs protect the machine and operator in  event of excessive pressure, allowing oil to safely bypass the loading valve INTERNALLY  with no spillage of oil from the hydraulic circuit, eliminating clean-up costs and  environmental hazards.
The DHM 4 Series records and wirelessly transfers data.

Technical Information
Inlet/Outlet Ports: 1.7/8” -12UN #24 SAE ORB
Calibrated Flow Range: 20-800L/Min
Rated Pressure Range: 0-480 Bar
Fluid Temperature Range: 0-120°C
Maximum Rated Pressure: Up to 480 bar, 7000 psi
Maximum Rated Flow: Up to 800 L/min, 210 US gpm
Ambient Temperature: 5 to 40°C, 41 to 104°F
Compatible Fluid: Mineral oils to ISO 11158. Other fluids consult sales office
Porting: BSPP, SAE
Material: Case: Powder coat painted Mild Steel, Flow Block: High tensile aluminium, Seal: FKM
DHM804 has limited pressure control below 86 L/min (23 US gpm).
The maximum controllable pressure in this region is calculated by: max pressure (in bar) = 5 x flow (L/min) + 30

Calibration
All DHM 4 series digital hydraulic testers are calibrated at a mean viscosity of 21cSt using ISO32 hydraulic mineral oil to ISO11158 category HM.
Calibration certificates are available on request - this is a chargeable option. Other  calibration on request - please consult the sales office.

Installation
It is recommended to connect the flow block with flexible hoses 1-2 metres (3-6ft) long. Inlet and outlet connections should always be of a similar bore size to that of the flow  block to prevent venturi or constriction effects.

Filtration
Must be better than DIN ISO4406: 21/19/16 or NAS 10 (typically achieved with 20-25u  filters).