Handheld Ultrasonic Energy & Flow Meter | FHS320

The FHS320 is a premium handheld transit-time ultrasonic flow and energy meter engineered for HVAC engineers, facility managers, and energy consultants who demand rapid setup and high-precision thermal/flow auditing. Equipped with dedicated Single (ST) or Dual (DT) Guide Mounting Tracks for instant transducer alignment, an optional PT1000 temperature sensor pair for BTU calculation, and a 16GB SD data logger, the FHS320 simplifies field verification across pipes from DN25 to DN1200.

Dual Flow & Energy (BTU) Functionality: Measures liquid volumetric flow rate or complete heating/cooling energy with optional clamp-on PT1000 sensors.
Ultra-Fast Guide Track Alignment: Single or dual mounting tracks ensure perfect transducer spacing and axial alignment in seconds.
Massive Data Logging: Integrated 16GB SD card slot supports long-term data logging and comprehensive PC software analysis.
High-Visibility Graphic Display: Large 240×128 backlit LCD screen with a full digital keypad for intuitive operation.
Extended Battery Power: 3000mAh rechargeable lithium battery delivers up to 16 hours of continuous field operation.

Add to Quote

Category: Ultrasonic Flow Meters: Non-Invasive Precision Without Pipe Cutting

Description

Rapid Field Spot-Checks & HVAC Energy Audits

The FHS320 is designed to address the specific challenges of facility management, HVAC troubleshooting, and energy efficiency audits. By combining non-invasive transit-time ultrasonic technology with optional clamp-on PT1000 temperature transducers, the FHS320 functions both as a precise liquid flowmeter and an instantaneous thermal energy (BTU) meter. HVAC technicians can rapidly evaluate heat exchangers, chiller loops, boiler efficiency, and hydronic balancing without cutting pipes or draining systems.

Precision Alignment with Single & Dual Mounting Tracks

Transducer misalignment is a primary source of measurement error in clamp-on flow metering. The FHS320 resolves this with its specialized Single Guide (ST) and Dual Guide (DT) mounting tracks. These rigid, scale-marked tracks lock the IP68 transducers into perfect alignment, eliminating manual spacing errors and reducing setup time to under two minutes.

Advanced Data Storage & Industrial Interfacing

For comprehensive auditing, the FHS320 includes an internal 16GB SD card logger capable of recording flow rates, totalized volumes, and thermal energy values at customizable interval rates (1 to 99,999 seconds). Stored files can be easily analyzed using the included software suite. Additionally, the meter provides a 4-20mA analog output and RS485 MODBUS communication for temporary system integration.

Features

Dual Functionality (Flow & BTU): Seamlessly converts from a standard liquid flow meter to an energy meter using optional clamp-on PT1000 temperature sensors.
Guide Track Mounting System: Single (ST) or Dual (DT) guide brackets guarantee exact transducer alignment and probe separation.
16GB SD Data Storage: Supports high-density logging over extended audit periods with full PC software data analysis.
Clear Graphic LCD: 240×128 backlit graphic display with full numeric keypad for easy parameter input in dim plant environments.
Robust Battery Life: 3000mAh rechargeable lithium battery pack supports up to 16 hours of uninterrupted field use.
Wide Pipe & Temperature Coverage: Measures pipe sizes from 1 inch to 48 inches (DN25 to DN1200) with transducer temperature ratings up to 130°C (266°F).
Submersible IP68 Transducers: Heavy-duty, encapsulated transducers built for demanding industrial environments.

Specification

Parameter	Specification
Measurement Principle	Transit-time ultrasonic flow measurement
Accuracy	±1.0% of measured value
Repeatability	0.2%
Flow Velocity Range	±0.03 ft/s to ±40 ft/s (±0.01 m/s to ±12 m/s)
Pipe Size Range	1″ to 48″ (DN25 mm to DN1200 mm)
Pipe Materials	Carbon steel, stainless steel, PVC, and other homogeneous compact materials
Applicable Media	Single medium liquids (water, wastewater, chemical fluids, oils)
Display & Keypad	240×128 backlit graphic LCD; full digital keypad
Data Logging	16GB SD card; logging interval 1 to 99,999 seconds
Energy (BTU) Option	External clamp-on PT1000 RTD temperature sensor pair with 9m cables
Outputs & Communication	4-20mA analog output (Max 750 Ω); RS485 (MODBUS protocol)
Transmitter Protection	NEMA 13 / IP54
Transducer Protection	Encapsulated design, IP68
Transducer Cable	Standard 5m (16ft) cable; extendable up to 30m
Fluid / Transducer Temp.	Standard (D1): -40°C to 80°C (-40°F to 176°F) / High Temp (D1U): -40°C to 130°C (-40°F to 266°F)
Operating Temperature	Transmitter: -40°C to 60°C; Humidity: Up to 99% RH non-condensing
Power Supply	3000mAh rechargeable lithium battery (16 hours continuous run time)

FAQ

How does the FHS320 measure thermal energy (BTU)?

When configured with the optional PT1000 temperature sensor package, the FHS320 measures both the liquid volumetric flow rate and the temperature difference between supply and return lines. The unit automatically calculates real-time heat transfer rates and total thermal energy consumption.

What is the advantage of the Single (ST) vs. Dual (DT) Guide Mounting Tracks?

The guide mounting tracks lock the two transducers onto a pre-calibrated rail. This ensures exact axial alignment along the pipe center and precise spacing. The Single Track (ST) is ideal for compact spaces, while the Dual Track (DT) provides added stability on larger pipe diameters or high-vibration lines.

How long can the FHS320 log data on its 16GB SD card?

With a 16GB capacity and customizable logging intervals from 1 to 99,999 seconds, the FHS320 can continuously log months or even years of flow and energy data without filling the memory. Data files can be easily transferred to a PC for reporting and analysis.

Can the FHS320 be used on hot water systems?

Yes. While the standard D1 transducers handle liquid temperatures up to 80°C (176°F), selecting the high-temperature D1U transducers extends operating capabilities up to 130°C (266°F), making it suitable for heating loops and boiler systems.

What comes included in the standard FHS320 kit?

The standard kit includes a rugged carrying case, the FHS320 transmitter, 1 pair of IP68 transducers with 5m cables, a choice of single or dual mounting track, pipe straps, coupling gel, a battery charger, an output cable, and a measuring tape.

Downloads

Handheld Ultrasonic Energy & Flow Meter | FHS320 – Datasheet