Watts HF Scientific Air Sentinel III - Introduction to the Unit; Overview; Use in Explosive Environments Safely; Specifications

IS-HF-AirSentinelIII-100123 Rev 0 4
Instrument Labels
The following labels should be applied to the outside of the enclosure.
Purpose Location Label
Product name and
certifications
Front of Air
Sentinel III
Serial number, manufacturer,
part number, power rating,
CE & cLCus marking
Front of Air
Sentinel III
Warning and Informational Front of Air
Sentinel III
Orientation
Introduction to the Unit
Overview
The Air Sentinel III is a purge controller that can be used to provide
protection for electrical equipment operating in potentially hazardous
areas. The Air Sentinel III controls the equipment power and measures
the air flow and pressure of the enclosure. The equipment must be
placed into a suitable electrical enclosure. The Air Sentinel III meets
the requirements of IEC 60079-0 and 60079-2. It has been certified
to IECEx hazardous location rating of Ex mb [pxb] IIC T4 Gb 0°C
≤Ta≤55°C and Explosive Atmospheres - Part 18: Equipment Protection
by Encapsulation “m”, IEC 60079-18:2009.
Use in Explosive Environments Safely
Specifications
Enclosure 316 Stainless Steel
Mounting 10 Studs, 1/4”-20
Display Indicators Three Bi-Color (Red and Green) LEDs
Alarms Three Form A (SPST-NO) Relay
Contacts Rated 2A at 125VAC or 2A at 30VDC
Control Output One Form A (SPDT-NO) Relay Internally Connected to Mains
Contacts Rated 2A at 240VAC
Electrical Connections One removable power input, one removable power output
Operating Temperature Range 0°C to 55°C (32°F to 131°F)
Power Supply 100-240VAC, 47-63 Hz, 5A
Environmental Conditions IP55
Altitude up to 2000 meters
Up to 95% RH (non-condensing)
IECEx Hazloc Rating Ex mb [pxb] IIC T4 Gb 0°C ≤ Ta ≤55°C
IECEx File # IECEx LC 19.0014
Recommended Supply Gas Water and oil free, Dry air, particles <5u, ISA Grade
Hydrocarbon Free. Full time, clean, dry air at 0-50 SLPM.
Pressure Measurement Range 1-10 mbar
Regulatory Compliance and
Certifications
CE Approved, UL 61010-1 (ed. 3), CAN/CSA C22.2 No.
61010-1-12 (R2017), EN61326:2006
In the interest of safety, the operator must ensure the
atmosphere where the instrument is located is safe from
gases, vapors, dust or other flammable conditions whenever
the instrument is opened for service or maintenance. At all
other times, the enclosure door must be kept closed with
purge air connected and the purge system operating with all
GREEN lamps lit indicating safe operation.
WARNING
!
Dimensions