Carefully designed for compactness and ease of use, the SL2 benefits from an easy to follow menu and simple set up for trouble free operation and accurate measurements while the unique clamp-on sensor design makes for a fast fit meaning results can be achieved within minutes!

With its low weight, long battery life and high performance the SL2 is the perfect tool for HVAC and energy measurement surveys while its affordability ensures a rapid return on investment. Compact, rugged and reliable, the SL2 provides sustained operation in a wide range of industrial applications and due to the non-intrusive nature of the clamp-on technique, no mechanical parts need to be inserted through the pipe wall or to protrude into the flow system so there is no pressure drop (save energy), no moving parts (low maintenance), no leaks and no contamination.

Employing state-of-the-art technology in ultrasonic flow measurement and digital processing, the self-adapting proprietary signal quality tracking allows the system to optimally adapt to the pipe material and flow profile automatically. The unique clamp-on fixture design makes the installation very straightforward and requires no special tools or skills and due to the non-invasive nature of clamp-on transducers, there is no pressure drop, no moving parts, no leaks, and no risk of contamination or corrosion.

The SL2 is perfectly suited to HVAC applications where its affordability ensures a rapid return on investment. Well managed systems are measured systems and this easy to implement flow data provider allows for access and control over your systems with fast results and the potential for immediate energy savings and application fine tuning.

Don’t leave it to your best estimates, get accurate data fast with the SL2 clamp on flow meter. With maximum long term reliability built in, the SL2 provides sustained operation in a wide range of industrial applications and environments and due to the non-intrusive nature of the clamp-on technique, no mechanical parts need to be inserted through the pipe wall or to protrude into the flow system so there is no pressure drop (save energy), no moving parts (low maintenance), no leaks and no contamination.

Ideal for the measurement of flows in clean, non-aerated fluids such as water, water/glycol and oils in full pipes from 1/2” to 180” (12 to 4570 mm) diameter can be measured and the ultrasonic signal penetrates all common metal and plastic pipe materials. User friendly and no cumbersome hardware, begin reading flow and gathering useful data as soon as the transducers are mounted. Connect the SL2 to external displays, recorders, data and loggers.

SL2 Large Display with User-friendly Calibration Menu. Measures, Totalizes and Transmits Flow in both Directions

Accurate Flow measurement of Clean Fluids from Outside Plastic or Metal Pipes

How it Works:

Transit Time flow meters utilize two transducers that function as both ultrasonic transmitters and receivers. The transducers are clamped on the outside of a vertical or horizontal pipe at a specific distance calculated by the instrument. The elapsed time between transmitted and received signals varies very slightly depending on whether the signal is traveling upstream or downstream and by comparing these time differences an accurate calculation of the flow rate is possible and is displayed in your choice of engineering units. As the ultrasonic beam crosses the pipe, compensation for laminar or turbulent flow is automatic.

Depending on the application and flow profile, the transducers can be mounted in V-method in which case the ultra sound transverses the pipe twice, the W-method in which case the ultra sound transverses the pipe four times or the Z-method in which case the transducers are mounted on opposite sides of the pipe and the ultra sound transverses the pipe only once. These modes are automatically selected by the instrument and are also user selectable. (X denotes the distance between the transducers, this is automatically calculated by the instrument at setup depending on the inputted application data)

Hardware & Operation

The SL2 electronics are housed in a rugged enclosure incorporating the graphic display, keypad, sensor and output facility connections. Programming the unit is carried out by selecting the options displayed in the main menu and by following the simple instructions. Enter the pipe diameter, wall thickness, pipe material, liquid and temperature and the optimum mounting method and separation distance for the sensors is automatically calculated. An acoustic gel (supplied) is used between the transducers and the outside of the pipe to ensure that sound is conducted from the sensors through the pipe wall.

Powered by an internal, rechargeable NiMH battery or can be operated continuously with AC power input. Use it for spot checks or for extended operation as a 4-20mA flow transmitter. Each SL2 includes a carrying case, transducer set, mounting hardware, cables and accessories. Battery status, signal strength, time and date, as well as flow information are all continuously displayed, keeping the user fully aware of the measurement process.. An acoustic gel (supplied) is used between the transducers and the outside of the pipe to ensure that sound is conducted from the sensors through the pipe wall. Signal strength, time and date, as well as flow information are all continuously displayed, keeping the user fully aware of the measurement process.

Flow Transducers

Only 3 types are needed to cover the pipe ranges 12mm (1/2”) up to 4750mm (190”) so selection is straightforward and the flow electronics is able to work with different transducer sets depending on the unit supplied and the application. Optional high temperature sensors are also available for use up to 250C.