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DHM Series Digital Hydraulic Multimeter DHM04-S | FT11621-21

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Description & Features

The DHM Series WEBTEC Digital Hydraulic Multimeter is a portable, battery-powered instrument designed for field testing and diagnosis of hydraulic systems. The DHM04-S handles flow across a 10–400 L/min (2.5–105 US gpm) range at pressures up to 420 bar (6,000 psi), with simultaneous temperature monitoring up to 250°F. Accuracy is held to ±1% of reading across the 15–100% flow range, ±0.5% full scale on pressure, and ±1°C on temperature, figures that make it suitable for both routine checks and detailed system analysis.

Connections are made via 1-5/16"-12UN #16 SAE ORB ports, and the unit is powered by a standard 9V alkaline battery with approximately 15 hours of service life. Rated IP54 for dust and splash resistance, it covers an ambient temperature range of -10 to 50°C (14–122°F). The powder-coated mild steel and high-tensile aluminium construction is sealed with FKM seals, compatible with mineral oils to ISO 11158.

SKU: FT11621-21
Supplier Part Number (MPN): DHM04-S

Specifications

Brand
WEBTEC
Brand
Webtec
Pack Size
1.00
UOM
EA
Flow Accuracy
±1% of Reading (15–100% range)
Pressure Accuracy
±0.5% Full Scale
Temperature Accuracy
±1°C / ±2°F
Ambient Temperature
-10 to 50 °C, 14 to 122 °F
Battery Life
Approx. 15 hours
Body Materials
Powder coat painted Mild Steel and High tensile aluminium
Compatible Fluid
Mineral oils to ISO 11158 (other fluids on request)
Flow Range (US gpm)
2.5 - 105
Flow Range (L/min)
10 - 400
Fluid Temperature Range
32 - 250°F
Gross Weight
7.5 kg, 16.5 lbs
Internal Materials
Powder coat painted Mild Steel and High tensile aluminium
IP Rating
IP54
Maximum Rated Flow
400 L/min, 105 US gpm
Max Rated Pressure
420 bar, 6000 psi
Net Weight
6.5 kg, 14 lbs
Porting
1-5/16” -12UN #16 SAE ORB
Power Supply
9V Alkaline Battery
Seals
FKM
Product Weight
0.99 lbs

Related Documents

Product Questions & Answers (1)

Question by: Clint H on Feb 2, 2026, 8:16 AM
How does the DHM04-S handle temperature variations during operation?
Answer by: Customer Support on Feb 3, 2026, 5:29 PM
With a fluid temperature range of 32 to 250°F and an ambient range of 14 to 122°F, the DHM04-S is designed to perform well in various temperature conditions typically found in industrial settings.