The DUAL LEVEL TANK LEVEL ALARM with produces different alarms for each level point.  Bright flasher and loud alarm when either point is reached.
Liquid level dual alarm
Better Tank Level Control…
  • Always on duty because it uses uninterruptible battery power that lasts for years.
  • Loud warbling tone cuts through the loudest industrial noise.
  • Rugged. Built for rough, wet and corrosive environments.
  • Uninterruptible battery power lasts for years. Lithium battery included. Lasts for years.
  • Power save circuitry switch allows battery alarm continuously for weeks.
  • No wetted metal parts.
  • Choice of power. Battery, 12VDC, 24VDC or AC power option.

THE DUAL TANK ALARM or two-point alarm has two adjustable float switches to provide two alarm points.  Each float switch is protected inside the end of a level probe.  Either float switch can monitor high or low level. They can be reversed for flexibility.

If either point is activated by the liquid level, a warbling alarm sounds and flashing LED activates.   Different alarm pattern for each float. (rapid or slow flashing and beeping)

Easily adjust able depth with no tools – just loosen the thumbscrew and slide either level probe to the desired depth. This is a semi-custom level alarm and so you can specify the depth you needed for each level probe.  Each is easily adjustable by loosening a thumbscrew.

The buzzer can be silenced by pressing the pushbutton while the LED continues to flash until the liquid level is corrected. Snooze alarm every 30 minutes thereafter until the level is corrected. Resets automatically when level is corrected.  Other modes of operation that can be selected with DIP switches:

  • No snooze alarm
  • “Tank filling” mode where the LED and buzzer shut off when the button is prssed.
  • Output delayed 15 minutes.
  • Relay output
  • Auto or manual reset after and alarm

Power save feature allows the unit to alarm continuously for nearly one month!  (The PCB limits the alarming to 60 minutes of full output, and if the alarm is ignored, then the alarm output is reduced to 6 seconds every 30 minutes)

All modes feature a low battery alert has a distinct stacatto tone. 

Also, for relay outputs, a broken cable alarm.

Float switches are protected inside the pipes. Removable float guard allows inspection of the float. 

Weatherproof – all NEMA 4X construction. Suitable for outdoor use.

Easy to install – no electrical wiring with battery version. Battery life is typically a number of years. Further discussion.

 Uninterruptible battery power works through power failures, can’t come unplugged, or be defeated. And, because the Tank Alarms don’t use any power until alarming, the batteries last for years. further discussion

Different materials: polypropylene is standard, PVDF, stainless steel available. see chemical resistance charts.

Any Depth. Specify depths you want at checkout.

Everything Included
Includes a 10-year lithium battery and threaded 2 inch NPT mounting plug.

Some Chemicals Commonly Used With Gizmo Engineering Tank Alarms:
  • Aqueous Ammonia (conc.)
  • Aqueous solutions to 100°C
  • Chromic acid (50%, Rm. Temp)
  • Glycolic acid
  • Hydrochloric acid (conc.)
  • Nitric acid (30%)
  • Oils (including waste oils)
  • Potassium carbonate (40%)
  • Polyester resin (viscous)
  • Sodium hydroxide (50%)
  • Sulfuric acid
  • Sodium Hypochlorite


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Two Point Tank Alarm

Polypropylene from $317

Depth of longest pipe
Short probe depth (default 8")
Two Point Tank Alarm

PVDF from $671

Depth of longest pipe
Short probe depth (default 8")


Relay Output with Cord

Switches a relay to control pumps or solenoids etc. Silences & tests alarm. Piggyback plug makes hookup easy. Instructions here
[RL-AC] $78

PLC Output

A circuit board allows you to select N.C. or N.O. output to your PLC. Includes button to silence buzzer. Includes 10ft of communications cable.
[PLC] $68

Different Buzzer Tones

Different buzzer tonesto audibly identifydifferentunits. Hear the  different tone types here
[BZ-xx] $18

Tone Type

Remote Button Box

A button box connected by 10ft of cable so slience/testing can be done in convenient locations.
[AB-remote] $69

Wireless Tank alarm

Wireless Transmitter & Receiver

Wireless transmitter inside the level alarm sends a wireless signal to the receiver. Buzzer and relay in receiver.   more info
[w2] $205

Accessories - Beacon-colors.jpgAlternate Color LED

Default color is red. Amber, Blue, green, and white are options.   [BL-x]    $11

Extra cable

Extra cable length over the standard length. Heavy 0.032″ jacket for superior durability, Four stranded conductors x 24 gage.
[C-8] $0.58/ft

Rim Mount Bracket

A bracket designed for mounting on open top tanks and containers. 1.3 inch dia. hole accepts adjustable collar.
[MB-R] $34

AC Power Cord

When plug-in AC power is preferred. Comes with 3-prong plug and 8-foot rubber-jacketed cord. Power convertor inside box.
[C-NA] $36

Mounting Options

Adapt to your tank from the 1″ NPT cord grip.

Circular Connector

This connector makes it easy to disconnect. Also easy to snake through tight places when installing.
[CN-1]   $36