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


Intrinsically Safe Tank Alarm monitors 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. After installing the battery, the 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 allows the Intrinsically Safe tank level alarm be located anywhere, instantly.


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. (can be enabled or not)
  • “Tank filling” mode shuts off LED and buzzer until the next liquid level event.
  • Auto or manual reset of the relay after level corrected
  • Relay orientation N.O. or N.C.
  • Relay output delayed 15 minutes


Durable Aluminum electronics enclosure.
Pipe and float switch are 316 stainless steel construction.  There is even a SS float guard included to protect the float switch so it can be moved frequently without worry about damage.

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

Reversible float switch.  SS and BUNA floats are reversible.  Specify preferred orientation in the order box.  You can always reverse the float later.

Grounding lug is included on stainless steel units.

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

Choice of materials: Float switches in 316 SS, BUNA, PP, or PVDF.


Battery Power is uninterruptible and allows installation anywhere. NoIntrinsically Safe Battery 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.

Thumbscrew Mount - stainless steel
Compression tank mount - stainless

Order Here

Stainless pipe and float  
Length (working depth)
Float orientation (float switch is reversible)
Stainless pipe and BUNA float
Length (working depth)
Float orientation (float switch is reversible)


Additional Replacement Battery

This is the only battery that is certified for use with GIZMO I.S. alarms.  One is included with the purchase of each tank alarm.
[BT-IS] $45

Circular Connector CloseupRelay Output

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

Welded Plug MountWelded Drum Plug on Tank Alarm

A 2″NPT  stainless steel plug welded to the pipe.  Sealed. Depth is not adjustable so specify working depth needed.
[WP-2] $76

Working Depth Needed
Extra cable

Extra cable length over the standard length of 10 feet that’s included. Heavy 0.032″ jacket for superior durability. Four stranded conductors x 24 gage.
[C4] $1.28/ft

Stainless Rim Mount

Bracket secures a tank alarm to the rim of an open tank.   more info

Stainless Compression MountCompression mount for tank alarm - stainless

Usually our standard nickel-plated brass compression mount is absolutely fine since its non-corroding and non-sparking.  But we also offer 316SS compression mount if desired. Dimensions are identical to the standard compression mount.

Ultra Light SS Float Switch
Light Weight Intrinsically Safe Float switch

Replaces the standard 0.73 S.G. float switch. This one is 0.50 S.G.  316SS.