HVAC air handling and ventilation

The most popular differential pressure switch combines advanced design and precision construction to make these switches able to perform many of the tasks of larger, costlier units. Designed for air conditioning service, they also serve many fluidics, refrigeration, oven and dryer applications. For air and non combustible compatible gases, Series 1910 switches have set points from 18 to 400 Pa...

The MF-PFA series can measure the airflow in combination with the self-averaging MFS flow sensors in addition to differential pressure. Besides analog outputs, this series also features a built-in PI controller, which can directly controll a fan and 2 swithes for local alarms. Due to the high accuracy and stability, the MF-PFA is ideal for use in laboratories, hospitals and clean rooms. Each in...

The MiniAir64 vane anemometer measures the speed of gaseous media and water, with a direct 4-20mA output. The Swiss Precision MiniAir64 Vane probe is unique. The lamella rotation has a very low resistance and is not affected by pressure, temperature, density and humidity. The MiniAir64 is also available with an ATEX certificate.

The reliable IVL air velocity transmitters work on the hot-wire measurement principle, which quarantees very good accuracy at low air velocity. The transmitters are suitable for air flow and temperature measurements in the air ducts. Air velocity transmitters are available with different measurement ranges and immersion lengths, with or without display.

TEK temperature sensors are designed for automatic ventilating systems to detect duct temperature. Sensors are mounted to the duct by means of an adjustable duct connection flange for optimal temperature detection

The MiniAir®20 is a vane air velocity, hygrometer and thermometer in one instrument. The multifunction handheld measures flow of gaseous and fluid media, relative humidity and temperature. The high precision makes this handset particularly suitable for laboratory applications. For the measurement of flow in aggressive gases, there are also special stainless steel vane detectors.

The Model 1950G Explosion-Proof Switch combines the best features of the popular Dwyer® Series 1950 Pressure Switch with the benefit of natural gas compatibility. Units are rain-tight for outdoor installations, And are ATEX approved CE ATEX II 2G Exd IIB+H2 T6. Adjustment to the set point of the switch can be made without disassembly of the housing.

Dwyer Magnehelic gage for high accuracy, guaranteed within 2% of full scale and for the wide choice of 81 models available to suit your needs precisely. Using Dwyer's simple, frictionless Magnehelic gage movement, it quickly indicates low air or noncorrosive gas pressures, either positive, negative (vacuum) or differential. The design resists shock, vibration and over-pressures. No manometer fl...

The series 3000MR Photohelic switch/gages combine the functions of a precise, highly repeatable differential pressure switch with a large easy-to-read analog pressure gage employing the durable, time-proven Magnehelic gage design. The Photohelic has 2 switch functions. Switch setting is easy to adjust with large external knobs on the gage face. Gage reading is unaffected by switch operation — w...

The Capsuhelic gage is designed to give fast, accurate indication of differential pressures. The gage may be used as a readout device when measuring flowing fluids, pressure drop across filters, liquid levels in storage tanks and many other applications involving pressure, vacuum or differential pressure.

The Model AAFS air flow switch provides excellent sensitivity and reliability at a very reasonable price. Quality features include a rugged die cast body, stainless steel vane and SPDT snap switch. Unit is field adjustable from 400-1600 FPM. Mounting is fast and simple,with only two screws needed. Vane fits 6 inch or larger ducts.

The Series 629C Differential Pressure Transmitter monitors differential pressure of air and compatible gases and liquids with 0.5% accuracy. The design employs dual pressure sensors converting pressure changes into a standard 4-20 mA output signal for two wire circuits. Small internal volume and minimum moving parts result in exceptional response and reliability.

The Series ADPS Adjustable Differential Pressure Switch is designed for pressure, vacuum, and differential pressures. The adjustment knob allows changes to the switching pressure to be made without a pressure gage. The ADPS is available with settings from 20 Pa up to 5000 Pa. The compact size, adjustment knob and low cost make the ADPS the perfect choice for HVAC applications.

The Dwyer series DM-2000 differential pressure transmitter senses the pressure of air and compatible gases and sends a standard 4-20 mA output signal. The DM-2000 housing is specifically designed to mount in the same diameter cutout as a standard Magnehelic gage. A wide range of models are available factory calibrated to specific ranges. Pressure connections are inherent to the glass filled pla...

The Series MS Magnesense Differential Pressure Transmitter is an extremely versatile transmitter for monitoring pressure and air velocity. This compact package is loaded with features such as: field selectable english or metric ranges, field upgradeable LCD display, adjustable dampening of output signal (with optional display) and ability to select a square root output for use with pitot tubes...

The Series PAFS-1000 Lightweight Flow Sensor is ideal for sensing differential pressure in the inlet section of variable air volume terminal units and fan terminal units. Units can also be used to sense differential pressure at other locations in the main or branch duct systems.

The Dwyer TE-D series consists of highly priced temperature sensors for installation in air ducts. There are several outputs that allow the sensor to be read on any type of Building automation system.

The Dwyer TE-E series consists of very competitively priced temperature sensors for mounting in walls on the wall. There are several outputs for each type of BMS possible

The Dwyer CDTA series carbon dioxide meter combines three measurements in one compact housing. The CDTA measures CO2, humidity and temperature, but can also be used as a set point generator. Communication with a GBS or PLC is via Modbus®, or BACnet, which can be chosen in the field. To facilitate installation, the RS485 address can be set using dip switches. The CDTA uses a non-dispersive infra...

The BTT series temperature transmitters are ideal for measuring temperature in air ducts. Sensor lengths of up to 450 mm insertion are possible for duct mounting sensors. The plastic terminal box with fastening tabs makes the installation easier.

The DX series differential pressure switch is suitable for detecting water pressure differences within the building automation. The DX series can be used as filter monitoring, but also as a flow monitor in, for example, a pump, heating system or cooling machine. The switch is robust and easy to install with the integrated mounting bracket. The splashproof housing makes it possible to place the...

The Dwyer GSTA series is a carbon monoxide (CO) transmitter for room or channel mounting. The GSTA series can be selected with and without display and has a 0-10 V or 4-20 mA output. Optionally there is an implementation with Modbus or BACnet communication.

The Dwyer AVUL series measures air speed and volume flow in ventilation ducts. The AVUL works on a hot wire principle with special coating for a long life. There may be chosen for English or metric units. Furthermore, there are analogue outputs, but also versions for Smart Buildings with BACnet or Modbus communication.

The Dwyer BTT-E series is a simple space temperature transmitter for wall mounting. For the analogue output, you can choose between 4-20 mA and 0-10 V, so that the transmitters can be connected to any BMS.