Gauges have a four-digit LCD display for easy reading of measurements. Commonly used to indicate clogged filters, these gauges display the difference between two pressure or vacuum measurements. They are also known as compound gauges.

With a digital display and selectable differential pressure ranges, these transmitters are a versatile alternative to transmitters with dial indicators. Unlike a standard transmitter that has one wider differential pressure range, these transmitters have multiple ranges to choose from. The selectable pressure range means they are more accurate than standard transmitters since their accuracy applies to each small range rather than a single wide range. They can also be configured to output either current or voltage, while standard transmitters typically output one signal type. The digital display allows you to troubleshoot and monitor differential pressure at the source. Also known as transducers, they measure the difference in pressure between two inputs and convert it to an electrical signal that can be interpreted by receiving devices, such as remote displays, programmable logic controllers, and motor speed controls. They are often used to indicate a filter is clogged or help you maintain a certain air pressure in ovens, dryers, and HVAC systems. All are rated UL 94 V-0, so they meet flammability standards. CE marked, they also meet European safety standards.

When measuring pressure in ductwork, pair them with a static pressure probe. Transmitters with an 8" pressure probe cable include a static pressure probe.

For your receiving device to interpret the signal from the transmitter, you will need to calibrate it for the transmitter's differential pressure range and output signal. As differential pressure increases, the output signal from the transmitter will increase. Transmitters will only provide accurate readings within the rated pressure range.

Connect them using two wires when using the current output. The same wire is used to send a signal to the receiver and to power the transmitter. Current doesn’t lose signal over long distances and isn’t affected by electrical interference from other devices. For voltage output, connect them using three wires—two wires into the power supply and a separate wire to send a signal to the receiver. The receiver and the transmitter share a common ground wire back to the power supply.

DIN-rail/surface mount transmitters give you mounting flexibility. They include the bracket you'll need for mounting it to DIN rail.

Transmitters with a calibration certificate traceable to NIST have passed tests for accuracy.

IP66 rated transmitters protect against dust and washdowns. Transmitters that meet IP67 protect against dust and submersion. NEMA 4X rated transmitters protect against dirt, weather, corrosion, and washdowns.

Remotely monitor the difference in air pressure between two inputs with these transmitters. Also known as transducers, they convert pressure to an electrical signal that is interpreted by receiving devices, such as remote displays, programmable logic controllers, and motor speed controls. These transmitters are often used to indicate a filter is clogged or help you maintain a certain air pressure in ovens, dryers, and HVAC systems. They mount directly to DIN rail or a flat surface without the need for additional brackets. CE marked, all meet European safety standards. These transmitters are rated NEMA 1 for indoor use.

When measuring pressure in ductwork, pair them with a static pressure probe.

For your receiving device to interpret the signal from the transmitter, you will need to calibrate it for the transmitter's differential pressure range and output signal. As differential pressure increases, the output signal from the transmitter will increase. Transmitters will only provide accurate readings within the rated pressure range. Connect them using two wires. The same wire is used to send a signal to the receiver and to power the transmitter. Current doesn’t lose signal over long distances and isn’t affected by electrical interference from other devices.

For technical drawings and 3-D models, click on a part number.

To prevent contaminating your oxygen line, these flowmeters are specially cleaned and bagged. As oxygen flows through, it pushes an indicator up the scale, showing you the flow rate. Mount these flowmeters vertically inline with your oxygen system, so oxygen flows up from the bottom. The flow-control knob lets you open and close the valve at the inlet to adjust the flow rate within the range.

These flowmeters are calibrated with oxygen but can be used with other gases. If you’re using these with a gas other than oxygen, you’ll need to calculate the flow rate by multiplying the number shown on the scale by the specific-gravity conversion factor for your gas.

For technical drawings and 3-D models, click on a part number.

Monitor liquid movement, color, and clarity in tube systems—these sights have barbed fittings that slide into soft plastic and rubber tubing. They have a clear body and an indicator that moves when flow is present, so you can visually confirm flow from a distance.