What is a Hydraulic Dynamometer used for?

It is used to measure power output of engines and motors by applying controlled load using fluid resistance.

What is a Water Brake Dynamometer?

It is a type of hydraulic dynamometer that uses water as the loading and cooling medium.

How is load controlled?

Load is controlled by adjusting sluice gates that regulate water volume inside the chamber.

Is it suitable for continuous operation?

Yes, continuous water circulation ensures proper heat dissipation for long-duration testing.

What is the difference between a Hydraulic Dynamometer and an Eddy Current Dynamometer?

A hydraulic (water brake) dynamometer controls load mechanically via sluice gates — it is simpler, more economical, and ideal for steady-state engine testing. An Eddy Current Dynamometer controls load electrically via excitation current — it responds faster, supports closed-loop automatic control, and is preferred for R&D and transient testing. Both are manufactured by Technomech.

Hydraulic Industrial Testing

Hydraulic Dynamometer Manufacturer in India

Technomech offers high-performance Hydraulic Dynamometers designed for reliable load absorption and accurate performance testing of engines and motors. These systems use fluid-based resistance to provide stable torque measurement for production, quality assurance, and R&D applications.

Fluid-Based Power Absorption
Medium to High Power Testing
Rugged & Continuous Duty
Custom Testing Solutions

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Fluid-Based Load Absorption

Uses water as the working medium to absorb power and generate controlled resistance.

Stable & Continuous Operation

Designed for long-duration testing with consistent performance.

Simple & Robust Construction

Mechanical design ensures reliability with minimal maintenance requirements.

Accurate Performance Measurement

Integrated load cell system provides precise torque and BHP measurement.

Product Overview

Hydraulic Power Absorption Systems

Hydraulic Dynamometers are power absorption devices that use fluid resistance to apply load on engines, motors, and rotating equipment. These systems convert mechanical energy into heat through controlled fluid interaction, enabling accurate performance evaluation. Technomech introduced its Water Brake Dynamometer range in 1992, making it one of India's longest-running hydraulic dynamometer manufacturers with over three decades of field-proven performance.

Technomech Hydraulic Dynamometers are designed for durability, simplicity, and cost-effective operation. They are widely used in industrial testing environments where stable and continuous load application is required.

System Compatibility

✔ Diesel and petrol engines
✔ Electric motors
✔ Gearboxes and machinery
✔ Automotive & Industrial equipment

Configurations

Types of Hydraulic Dynamometers

Water Brake Dynamometer (WBD)

The most commonly used hydraulic dynamometer, utilizing water as both the loading and cooling medium.

Custom Hydraulic Systems

Specialized configurations designed for specific industrial applications and testing requirements.

Water Brake Dynamometer (Primary Product)

Technomech Water Brake Dynamometers are designed for accurate measurement of Brake Horse Power (BHP) of various prime movers including diesel engines, petrol engines, electric motors, vehicles, and gearboxes.

These are sluice gate operated dynamometers where water acts as both the loading and cooling medium. The system absorbs mechanical energy and converts it into heat, which is dissipated through circulating water, ensuring stable and continuous operation.

The rotor and stator rings are made from phosphor bronze material, while the power absorption unit is mounted on a sturdy cast iron base plate with trunnion support. Load indication is provided digitally using a load cell, and a calibration setup ensures long-term accuracy.

Why Choose Technomech

Expertise in Load Absorption

Proven Engineering Expertise

Over four decades of experience in dynamometer manufacturing and application engineering.

Robust Industrial Design

Heavy-duty construction ensures long service life in demanding production environments.

Accurate Measurement Systems

Digital load cell-based measurement with full calibration support for sustained precision.

Cost-Effective Solution

Simple mechanical construction ensures economical operation and low ownership costs.

Calibration Setup Included

Calibration lever and deadweight setup provided for periodic accuracy verification — SI or Imperial units.

How It Works (Water Brake)

Water Filling

Water is introduced into the dynamometer chamber acting as the loading medium.

Rotor Rotation

The engine drives the rotor inside the water-filled chamber.

Fluid Resistance

Water creates resistance, effectively absorbing mechanical energy.

Load Control

Sluice gates regulate water volume to precisely control torque.

Heat Dissipation

Heat generated is removed efficiently through circulating water.

Torque Measurement

Reaction torque is measured accurately using a load cell system.

Model	Capacity (BHP)	Rated Speed (RPM)
TM15	15 BHP	1500 RPM
TM50	50 BHP	1500 RPM
TM150	150 BHP	1500 RPM
TM300	300 BHP	1500 RPM

Operational Range

BHP vs RPM Performance Curves

Scientific System Selection

The selection of a hydraulic dynamometer is a scientific process. The BHP vs RPM curves represent the power absorption capacity of each model across its entire speed range.

Detailed curves available

Full-scale log-log performance graphs for all TM series models are available in the official brochure.

Download PDF

Technical Specifications

Type: Hydraulic (Water Brake)
Working Medium: Water
Construction: CI Base / Phosphor Bronze Internals
Rotor & Stator Material: Phosphor Bronze
Mounting: Trunnion Mounted
Measurement: Digital Load Cell
Load Control: Sluice Gate (Manual / Motorized)

BHP Formula

Brake Horse Power calculation based on dynamometer parameters:

BHP = (W × N) / C

W = Load in kilograms
N = RPM of dynamometer
C = Dynamometer constant

Load Control System

Load control is achieved by adjusting sluice gates using a robust chain and sprocket mechanism. This allows for precise control over water volume, directly influencing torque and load conditions.

Manual Operation

Operated using a standard handwheel for manual adjustment.

Motorized Configuration

Load control is effected by adjusting sluice gates via a chain and sprocket mechanism — operated manually with a handwheel, or remotely using an electric motor with limit switches.

Advantages

✔ Sturdy and robust design
✔ Fast response and accurate calibration
✔ Dynamically balanced rotor
✔ Highly economical solution
✔ Simple mechanical construction
✔ Reliable and long service life
✔ Calibration setup included for periodic accuracy check

Versatility

Applications

Engine Testing

Measurement of brake power for diesel and petrol engines.

Motor Testing

Performance evaluation of electric motors.

Research & Development

Performance validation and experimental analysis.

Vehicle Testing

Measurement of brake power of vehicles and drive systems in production and QA environments.

Gearbox & Transmission

Load testing of gear boxes and transmission assemblies at rated speed.

FAQs