402AS0 pages

402AS
AUTOMATIC SEQUENCER

APPLICATIONS
Allows a single Nova gas analyzer to be time shared over
many sample points. It can be controlled locally or by the
customer's PLC. Applications include mushroom farms,
multiple greenhouses, flue gas ducts, landfill wells, and
many others.

FEATURES
• Available from 3 to 24 sample points selected
by solenoid valves
• Greatly reduces cost per sample point for
multiple-zone analyses
• Digital display of active sample point with time
remaining countdown
• Selectable sample time
• Provides sample stream identification
• Manual override with sample hold
• Skip feature allows unwanted samples to be
skipped over.
• All samples continuously drawn into sequencer
by built-in by-pass pump to keep non-active
samples 'fresh'; only active sample point goes
to analyzer, the rest are vented.

OPTIONS
• Relay contacts for each sample point
• Available without micro-controller for connection
to customer's PLC (Model 401S)

NOVA ANALYTICAL SYSTEMS
www.nova-gas.com

Sample Lines from
Monitored Zones

402AS Autosequencer
Wallmount Enclosure

or

402AS Autosequencer
Rackmount Enclosure

Selected Sample
Stream Sent to
Gas Analyzer
(sold separately)

www.nova-gas.com