The Series 641 Air Velocity Transmitter is the ideal instrument for monitoring air flow. This transmitter uses a heated mass flow sensor which allows for precise velocity measurements at various flow rates and temperatures.

• Accuracy: 3% FS Process gas: 32 to 122 F
• Outputs: 4-20 mA
• Power Requirments: 12 to 35 VDC, 10 to 16 VAC
• Current Consumption: 300 mA max

The Series 641 Air Velocity Transmitter is the ideal instrument for monitoring air flow. This transmitter uses a heated mass flow sensor which allows for precise velocity measurements at various flow rates and temperatures.

• Accuracy: 3% FS Process gas: 32 to 122 F
• Outputs: 4-20 mA
• Power Requirments: 12 to 35 VDC, 10 to 16 VAC
• Current Consumption: 300 mA max

The Series 641RM Air Velocity Transmitter with Remote Probe features the same highly accurate heated mass flow sensor as the Series 641, with a remote probe construction.

• Accuracy: 3% FS Process gas: 32 to 122 F
• Outputs: 4-20 mA
• Power Requirments: 12 to 35 VDC, 10 to 16 VAC
• Current Consumption: 300 mA max

The Series 641B Air Velocity Transmitter uses a heated mass flow sensor suitable for dirty air flow applications.

• Accuracy: 5% FS process gas: 32 to 122 F
• Outputs: 4-20 mA
• Power Requirments: 12 to 35 VDC, 10 to 16 VAC
• Current Consumption: 300 mA max*

The Dwyer Series 4000 is designed to provide a fast and accurate indication of differential pressures and holds the measurable pressure within a capsule allowing it to be used on system pressures up to 500 psig.

• English: 0 - 5 Inches of Water
• Accuracy: +/-3% of F.S.
• Service: Air and compatible gases and oil based liquids

The Dwyer Series 4000 is designed to provide a fast and accurate indication of differential pressures and holds the measurable pressure within a capsule allowing it to be used on system pressures up to 500 psig.

• English: 0 - 6 Inches of Water
• Accuracy: +/-3% of F.S.
• Service: Air and compatible gases and oil based liquids

The Dwyer Series 4000 is designed to provide a fast and accurate indication of differential pressures and holds the measurable pressure within a capsule allowing it to be used on system pressures up to 500 psig.

• English: 0 - 10 Inches of Water
• Accuracy: +/-3% of F.S.
• Service: Air and compatible gases and oil based liquids

The Dwyer Series 4000 is designed to provide a fast and accurate indication of differential pressures and holds the measurable pressure within a capsule allowing it to be used on system pressures up to 500 psig.

• English: 0 - 15 Inches of Water
• Accuracy: +/-3% of F.S.
• Service: Air and compatible gases and oil based liquids

The Dwyer Series 4000 is designed to provide a fast and accurate indication of differential pressures and holds the measurable pressure within a capsule allowing it to be used on system pressures up to 500 psig.

• English: 0 - 20 Inches of Water
• Accuracy: +/-3% of F.S.
• Service: Air and compatible gases and oil based liquids

The Dwyer Series 4000 is designed to provide a fast and accurate indication of differential pressures and holds the measurable pressure within a capsule allowing it to be used on system pressures up to 500 psig.

• English: 0 - 25 Inches of Water
• Accuracy: +/-3% of F.S.
• Service: Air and compatible gases and oil based liquids

The Dwyer Series 4000 is designed to provide a fast and accurate indication of differential pressures and holds the measurable pressure within a capsule allowing it to be used on system pressures up to 500 psig.

• English: 0 - 30 Inches of Water
• Accuracy: +/-3% of F.S.
• Service: Air and compatible gases and oil based liquids