Laboratory Airflow Controls and Monitors are for use with fume cupboards and chemical cabinets. Available in A and C versions, these range from a basic airflow alarm to an airflow sash high alarm. Version C includes a control output for extract and make up fans.
Fume cupboard standard BS EN 14175-2:2003 recommends:
LABAIR is a product that meets the requirements of fume cupboard standard EN 14175, electro-magnetic standard EN 61326, and RoHS Directive CE12
When the fume extract fan is running, it causes negative pressure inside the fume cupboard. If the sash is lowered, the negative pressure increases causing air to be drawn faster through the sash opening. Conversely, if the sash is raised the negative pressure reduces and air velocity reduces.
The Labair sensor detects this change in velocity and sends a signal to the control which is used to produce a visual indication of velocity through the sash.
Labair A and C give both a visual and audible alarm for low velocity whilst the Labair C can also send a signal to the fan speed controller to maintain a constant velocity, irrespective of the sash height.
C Series Controller
• Energy savings: only the lowest amount of air is exhausted
• Low air speeds ensures reduced noise level
• Flexibility: Fan speed can be adjusted at any moment
• Simple wiring: the VAV system and inverter derive their power from 230V single phase
Features
• Audible alarm and LED visual
• VAV control system to inverter or damper
• Digital display of air velocity in meter per second (m/s) or feet per minute (digital version only)
• 3 push buttons: fan on/off, light on/off & alarm mute
• Factory precalibrated
• High precision numerical airflow sensor
• Sash high contact
• Alarm relay, battery back up optional
• Available in vertical or horizontal configuration (version A/LED only)
• White Colour
Options
• Battery back up: Red LED alarm is still functional up to 12 hours when unit loses power
• Custom resin stickers: Customiseable resin stickers with logo, address, etc
A Series Controller
• All in one/multifunctional unit
• Fast and simple installation
• Attractive design
Features
• Audible alarm and LED visual
• Digital display of air velocity in meter per second (m/s) or feet per minute (digital version only)
• 3 push buttons: fan on/off, light on/off & alarm mute
• Factory precalibrated
• High precision numerical airflow sensor
• Sash high contact
• Alarm relay, battery back up optional
• Available in vertical or horizontal configuration (version A/LED only)
• White Colour
Options
• Surface box mounting: Plastic enclosure to mount the face plate and to avoid profile cutting the service panel
• Alarm relay: A remote alarm can be triggered from a relay on the controller pcb
Panel in white, dark grey or silver plastic – 210 x 90 x 10 deep – IP55 embedded ‘O’ ring sealed
Mounting vertical or horizontal options
Logo sticker – crystal domed stating either AXAIR or custom printed design
Control sticker with either black or white background
LEDs in green and red indicate whether sash face air speed is High, Normal, or Low
LEDs in orange indicate Sash High, Calibration Mode, Fan Run, and Light On
Buttons for Fan Run, Cupboard Light and Audible Alarm Mute
Button test procedure to confirm that all alarm features are operational
Electronics operate at 12Vdc via a 230Vac/12Vdc power supply; battery back-up is optional
Settings for alarm delay, system purge, and re-calibration
Connection points for power supply, air speed sensor, fan relay, cupboard light, sash high
Protection in an IP55 surface box, or IP55 sealed to a service panel cut-out.
LABAIR-A for basic air speed monitoring and alarm feature
LABAIR-C for additional control of air speed at the sash face utilising PID output to an inverter fan drive or damper electronics
LABAIR-AD & CD to digitally display the air speed at the sash face