Intrinsically Safe Alarm box connects to any simple apparatus like a float switch.  Produces a loud alarm and flashing LED.

MODEL IS-AB
FLEXIBLE ALARM BOX…
  • Uninterruptible battery power is always on.
  • Replaceable lithium battery lasts for years.
  • Low battery alert.
  • Smart software allows continuous alarm for one month!
  • Very loud buzzer is 101 dB per 2 feet (like a smoke alarm)
  • Durable. Built for rough, wet and corrosive environments. IP65.
  • Additional relay output.
  • Class I, Div. 1. Groups C, D
  • 60079-0 and 60079-11. Zone 0.

Connects to a normally closed (or open) contact and converts it to a loud buzzer and a flashing LED. Often used with Gizmo Engineering liquid level switches. The 101 dB buzzer has a unique warbling sound that cuts through the sound of the factory.

OPERATION

At the time of a level conditions, the buzzer sounds and the beacon LED flashes. At this time the front button will turn off the buzzer. In the default mode, the LED continues to flash until the liquid level is corrected. Resets automatically when alarm condition is corrected. If not in alarm mode, then the front button checks the alarm.

Different behaviors can be selected using the DIP switches inside the box. Modes to choose from:

  • 30-minute snooze alarm.  (buzzer sounds again 30 mins. after being silenced)
  • automatic or  manual reset after level correction.
  • relay N.O./N.C.
  • relay output delayed 15 minutes.
 
CONSTRUCTION

Durable PVC enclosure is tested and certified for IP65. Suitable for outdoor use and aggressive conditions. Temperature range from + 60ºC to -40º C.

Additional relay output available for connection to safe areas through an approved intrinsically safe barrier. (order in the options section below)

OPTIONS

The alarm box can be connected to any “Simple Apparatus” such as temperature switches, flow switches, pressure switches and more. 

Intrinsically_Safe - IS-AB-with-PP-probe.jpg
MODEL IS-AB CONNECTED TO FLOAT SWITCH LEVEL PROBE
INTERNAL VIEW SHOWING DIP SWITCHES
LABEL
  • Stainless float switch S.G…………………..0.75
  • Polypropylene float switch S.G………….0.60
  • Enclosure material………………………….. PVC
  • Buzzer volume…………………………………101dB @ 2ft.
  • Battery capacity………………………………. 2400 mA-hr
  • Operating temp………………………………. -40 to 60ºC (-76-140ºF)
  • Ingress protection……………………………. IP65
  • Lens material……………………………………Lexan
  • Stainless steel…………………………………..316 except retaining rings are type PH 15-7 Mo
  • Current consumption during alarm…..30mA
  • Relay current…………………………………….80mA max.
  • Battery chemistry……………………………..Lithium Thionyl Chloride
  • Battery pack voltage…………………………7.2VDC
  • Lithium weight…………………………………1.2g (per pack)
  • Cable capacitance (if applicable)………30pf/ft
  • Maximum cable length…………………….5000 ft

Specifications PDF

CSA has certified this unit to the following standards:

  • CSA CAN/CSA C22.2 No. 0-10
  • CSA CAN/CSA-22.2 No. 60079 0-15
  • CSA CAN/CSA-22.2 No. 60079-11-14
  • CSA CAN/CSA-22.2 No. 1010-1012
  • C22.2 No. 60529:16
  • ANSI/ISA-60079-0 (12.00.01)-2013
  • ANSI/ISA 60079-11 (12.02.01)-2014
  • ANSI/UL 61010-1, 3rd Ed.
  • UL913, 8th Ed.

Ex ia IIB T4 Ga 
Class I, Zone 0, AEx ia IIB T4 Ga 
Class I, Div. 1 Groups C and D T4, IP65

CSA File number  263009
CSA file lookup

The enclosure is suitable for outdoor use down to -40 deg. C.  

The cable connecting to our float switch level probes is PVC jacketed 0.8 mm [0.031 inch] thickness. 

For the  316 stainless steel level probe, the wetted parts are 316 SS except the retaining rings on the float switch which are 15-7SS.  Click here for chemical resistance chart.

The alternative level switch construction is polypropylene which is suitable for temperatures up to 200 deg. F   [93C]  Click here for a chemical resistance chart.

We stock other float switch and pipe materials too like PTFE and Kynar.  Please call us for more information on these.

There is only one model of I.S. alarm box which is model IS-AB.

Adding the optional relay output would change the part number to IS-AB-RLY.

A connected level probe sensor would be denoted as an additional line item. Level Probes follow the numbering in the following chart:

ORDER HERE

IS-AB

ALARM BOX

Intrinsically safe alarm box for Class I, Div. I Hazardous Locations.

$470

Float Switch Level Sensor – Stainless Steel

Stainless steel float switch mounted in a rigid stainless steel pipe.  1 inch NPT tank mount is standard. Includes 10 ft. cable.
[LP-SB or LP-SS] 

Depth
ORIENTATION

OPTIONS

Relay Output

A relay output for signals sent to an approved I.S. barrier. 80mA max.  10ft cable is standard.
[IS-RLY] $54

Extra cable

Extra cable length over the standard 10ft length. Heavy 0.032″ jacket for superior durability, eight stranded conductors x 24 gage.
[C-8] $0.66/ft

Stainless Rim Mount

Bracket secures a tank alarm to the rim of an open tank.   more info
$95
[MB-SS] 

Replacement Battery

This is the only battery that may be used with GIZMO I.S. alarms
[BT-IS] $45

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