Intrinsically Safe Tank Alarm

INTRINSICALLY SAFE TANK LEVEL ALARM alerts if liquid level is high or low with a loud beeping and flashing.

MODEL IS-T

Monitor tank level in hazardous locations

  • Always on duty because battery power is uninterruptible.

  • Replaceable Lithium battery included lasts for years.

  • Loud buzzer is 101dB @ 2 ft. (like a smoke alarm)

  • Rugged. Built for rough, wet and corrosive environments.

  • Bright flashing LED visible in daylight.

  • Low battery alert.

  • Silencing/test button.

  • Hazloc Class 1, Div. 1. groups C and/or D. 60079-0 and 60079-11.   Zone 0.

EASY TO INSTALL. The liquid-tight 2″ NPT tank mount is adjustable by hand. Simply loosen the nut and slide the alarm to the depth you want. Other mounting hardware available if needed.
Battery powered so it can be located anywhere, instantly.

OPERATION

When there is a high or low level condition, the buzzer sounds and the beacon LED will flash. In the default mode, the user presses the button to silence the buzzer, and the LED continues to flash as a reminder. The 101 dB buzzer has a unique warbling sound cuts through factory noise so it will be heard.

Different behaviors are field-selectable using DIP switches on the circuit board. Choose from:

  • 30-minute snooze alarm, (on/off)
  • tank filling mode (where it shuts off LED and buzzer until the next fillup)
  • auto/manual reset after level corrected
  • relay N.O./N.C.
  • relay output delayed 15 minutes
 
CONSTRUCTION

Battery Power is uninterruptible and allows installation anywhere. No outlets, electricians, or inspectors needed. The Lithium batteries included and have a shelf life of 20 years. A 2400mA-hr capacity combined with smart software allows these to sound for 25 days straight! In typical situations the batteries will last for many years. When the batteries do run low, a unique low-battery signal is given. (different from the level alarm signals) Batteries are user-replaceable in the hazardous location.

Durable Aluminum electronics enclosure.
Pipe and float switch are 316 stainless steel construction.  There is even a SS float guard available to protect the float switch for applications where the alarm is being moved frequently.

Harsh Weather rated temperature range is +60ºC to -40º C. [140ºF to -40ºF]

Grounding lug is included on stainless steel units.

Optional Relay Output for connection to safe areas through an I.S. barrier.

Choice of materials: stainless steel pipe and float switch or BUNA float switch, or polypropylene pipe and float switch is a  more economical option.

IS-T WITH FLOAT GUARD

IS-T VIEW OF THE LABEL

INSTRUCTIONS

OPERATING MODES CHART

CERTIFICATE OF CONFORMANCE

CONTROL DRAWING

BATTERY DATASHEET

RELAY OUTPUT WIRING

BROCHURE

  • Float S.G (stainless)………………………….0.75
  • Float S.G. (BUNA)……………………………..0.60
  • Float S.G  (PP)…………………………………..0.60
  • Enclosure material………………………….. Aluminum
  • Buzzer volume…………………………………101dB @ 2ft.
  • Battery capacity………………………………. 2400 mA-hr
  • Operating temp (ambient)………………. -40 to 60ºC (-76-140ºF)
  • Maximum temp. (liquid)…………………..149ºC [300ºF]
  • 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 of 2 cells)
  • Cable capacitance (if applicable)………30pf/ft

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

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

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

Here is a breakdown of a typical part number IS-T-SS-12.

IS-T………Intrinsically Safe tank alarm

MATERIAL
-SS………stainless steel pipe + stainless steel float switch
-PP………polypropylene pipe + polypropylene float switch

WORKING DEPTH
-12………12 inch working depth
-18………18 inch working depth
-24……….24 inch working depth
-36………36 in working depth
-48………48 inch working depth.

Order Here

Stainless pipe and float  
(IS-T-SS)
Depth
Notes
Stainless pipe and BUNA float  (IS-T-SB)
Length
Polyproplyene pipe/PP float  
(IS-T-PP)
Depth
Notes

OPTIONS

Mounting Bracket – Stainless

Fastens a tank alarm securely to the side of an open tank or truck opening with SS thumbscrews.
[MB-SS] $95

Slip-on Guard

For applications where the alarm is frequently removed from tanks or drums the guard prevents damage to the float. Secures to the pipe with set screws.
[FG-SS] $95

Relay Output

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

Welded Plug

A 2″NPT  stainless steel plug welded to the pipe. Depth is not adjustable.
[RB-SS] $56

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

Replacement Battery

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

Stainless Mounting Collar – 1″ NPT

Easily adjustable depth using a thumbscrew for situations where quick adjustment is needed.  Machined so there is a minimum possible space between the pipe, however it does not provide a waterproof seal.  316SS.
[K-SS-1]   $85

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