Air flow hood

Air flow hood

SwemaFlow 236

P/N: 769780 [View large]
• Exhaust air flow
• 1...65 l/s, 2...137 cfm
• High accuracy and stability
• Temperature
• Barometer
• Density compensation
• Real or Standard flow
• EN 16211, EN 12599 compliant

SwemaFlow 236 measures air flow on exhaust valves in HVAC systems. The unique Swema principle, a net of hot wires, gives accurate measuring values over the whole measurement range.

SwemaFlow 236 manual

SwemaFlow 236 Product sheet

Measurement range
Air flow: 1...65 l/s, 3.6...234 m³/h, 2.1...137 cfm
Temperature: 0...50 °C, 32...122 °F
Barometer: 600...1200 hPa, 18...35 inHg

Measurement uncertainty
Air flow: ±3.5% read value (at 20...25 °C)
min ±1 l/s, 3.6 m³/h, ±2.1 cfm
Temperature: ±1 °C, ±2 °F
Barometer: ±3.5 hPa, ±0.1 inHg

At 95% coverage probability in non condensing, non moist air, <80%RH, non aggressive gases.

Measurements corrections based in the calibration protocol are not needed to obtain the above stated uncertainty.

Shaft length: 45...80 cm (adjustable)
Measurement opening: 190 x 200 mm (inner)
Height: 330 mm
Weight: 1.5 kg
Power supply: Rechargeable Li-Ion battery
Battery life: <9 hours continuous measurement
Battery charging time: <2 hours with included adapter, with usb-adapter (mini-usb) 5V and minimum 0,5A output it takes longer. SwemaFlow can be used during charging.

Measuring principle and recommendations
Net of hot wires. SwemaFlow 236 with and without adapters is primarily for exhaust air flows and measures according to EN 16211 method ET 21. For supply valves, grilles and diffusers Swema recommends SwemaFlow 126 with the back pressure function and SwemaFlow 4001 with a larger cross section for higher flows.

Density compensation
Temperature and barometric pressure is measured. Select Real or Standard flow with PC-setting.

Functional design
Low weight and telescopic handle with angular adjustment.

Segment with backlight, hold. Digits can be displayed upside down.
l/s, m³/h, °C and hPa or cfm, °F and inHg, depending on PC-settings.

Delivery contents
SwemaFlow 236, charging adapter (230 V Europlug - EN 50075), calibration protocol, manual, aluminium frame case

Swema AB, SE556052555101