Air & Water Flow

AV Air Velocity Sensor & Probe

Air Velocity Sensors & Probes A range of single and multipoint air velocity probes and sensors, plus wind speed and direction sensors for outdoor use.

AV-D Single Point Air Velocity

The AV-D is a single-point, multi-range Air Velocity Transmitter with user selectable 0-10Vdc or 4-20mA outputs and four user selectable measurement ranges. The unit has a built-in self-test feature and the user can manually override the output to 0%, 50% or 100% of output range to aid commissioning.

AV-EP Multi-point Air Velocity Probes

The AV-EP series of air velocity probes are available in lengths from 100 to 600mm. They are used to ensure that recommended flow rates for public buildings and industrial plant are achieved. Using a PA-60-x, PA-65-x or PA-699 Air Differential Pressure Sensor of an appropriate range (please refer to data sheet on Sontays website for further information), the output of the sensor represents the velocity pressure and is defined by the following equation:

AV-MPS Multi-point Air Velocity Probes

the AV-MPS series in lengths of 700 to 2000mm. They are used to ensure that recommended flow rates for public buildings and industrial plant are achieved. Using a PA-60-x, PA-65-x, PA-267-x or PA-699-x Air Differential Pressure Sensor of an appropriate range (please refer to data sheet on Sontays website for further information), the output of the sensor represents the velocity pressure and is defined by the following equation:

AV-W-AD Wind Speed & Directon Sensor

The AV-WAD measures wind speed & Direction providing a pulsed output and is intended for applications where external weather conditions influence the building control strategy, such as for the automatic closing of windows. A mounting arm and U bolts for pole mounting are included.

AV-W-S Wind Speed Sensor

The AV-WS measures wind speed providing a pulsed output and is intended for applications where external weather conditions influence the building control strategy, such as for the automatic closing of windows. A mounting arm and U bolts for pole mounting are included.

FS Air & Liquid Flow Switches

Air & Liquid Flow Switches A range of paddle switches for air and liquid flow proving in ducts and pipes.

FS-521-Air Flow Switch

The FS-521 paddle switch is intended to monitor airflow within a duct and provides a switched output on detection of either a specific air velocity or flow failure.

FS-W-Liquid Flow Switch

The FS-W paddle switch is intended to monitor liquid flow within pipes and provide a VFC output on detection of either a specific flow rate or flow failure. Screws directly into a 1 BSPT boss

LS Liquid Level Switches & Sensors

Liquid Level Switches & Sensors A range of float switches, and capacitive or ultrasonic level sensors for liquids.

LS-541-Liquid Level Switch

The LS-541 is intended to monitor the liquid level in a tank or vessel and provides a switched output for local alarm, pump or valve control. The differential between switching is equivalent to approximately 15mm. The unit mounts into 1 BSPT female boss. Access is not required to the inside of the tank.

LS-712-Hydrostatic Level Transmitter

Sontays new LS-712 range of submersible water level transmitters provides continuous hydrostatic level measurement up to 10.2m of water. They are suitable for many applications such as water tanks, wells, sumps and ponds. Transmitters have a vented cable which provides an atmospheric reference for the sensor, which is necessary for ensuring repeatable, precision depth measurements under the most adverse conditions.

LS-CAP-Capacitance Level Sensor

These sensors are designed for level measurement in tanks or sumps providing a 4-20mA output relating to the level of fluid in the tank. The LS-CAP1 is suitable for conducting liquids such as water whilst the LS-CAP2 is designed for use with clean, low viscosity non-conducting liquids such as oil.

LS-FL-Multi-Level Switch

The LS-FL series is a range of level switches suitable for single or multi-level applications where access is only available from the top surface or where multiple level sensing is desired from a single penetration. Units consist of a float, which is suspended from a weighted cable. As the liquid level changes, the float follows the surface level, at the same time tilting due to its weighted restraint. Inside the float are a number of micro switches which trigger as the float tips.

LS-SN-Level Switch Side

A range of level switches designed for high and low liquid level detection in tanks and vessels. The LS-S types are for side mounting, type 1 switches fit from the inside of the tank and tighten on to a back nut whilst the type 2 switches mount from the outside into a tapered boss.

LS-SS-Stainless Level Switch Side Mount

LS-TM-Reversible Top Mounting Level Switch

The LS-TM is an easy to install Top Mounting Level Switch, and has a reversible float so that it can be used for either high or low level alarms. The float is suspended from a 5 metre (16.4 ft) PVC cable with a polyethylene weight and is fully submersible and adjustable.

LS-UT Ultrasonic Level Transmitter

The LS-UT provides accurate level measurement for liquids in tanks or sumps in applications where non-contact level monitoring is the preferred option. The 4-20mA loop powered output represents the distance between the surface of the liquid being detected and the transmitter. It has a user programmable measuring range of up to 8 meters, it works by sending out ultrasonic sound waves from its sensor, the sound waves reflect off the surface of the liquid in the vessel and return back to the sensor. The time taken to perform this process is calculated and then converted to provide a measurement in meters.

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