LOW LEVEL DRUM ALARM  warns of empty drums with a bright flashing LED and a loud beeper when liquid level is low.

Low level drum alarm

Drum Low Level Control…

  • Always on duty because the liquid suction tube is permanently attached to the alarm unit.

  • It can go anywhere because its battery powered. No need for power outlets.

  • Uninterruptible battery power lasts for years. Lithium battery included.

  • Loud warbling tone cuts through the loudest industrial noise.

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

  • Protects your pumps from debris with an intake screen.

  • Adjustable depth using a thumbscrew.

  • No metal parts to corrode.

MONITOR LOW LIQUID LEVEL IN DRUMS continuously with the Drumalarm™.  Quick and easy to install – simply connect the battery and your liquid suction line and you’re ready to go!


Various mounting styles available for any container.  The slip-on cap is the most popular as it makes transfer to new drums so easy since you don’t have to screw it in, instead, it just drops over the bung.

On the other hand, threaded drum plug mounting is more secure and can seal the drum when noxious vapors are a problem. 


An attached suction pipe can’t be separated from the float switch, so the level alarm is always on duty. The rigid suction pipe ensure that your pump is always drawing liquid from below the alarm point.  At the same time, adjusting the depth to the bottom of a drum makes sure the maximum all the chemical is extracted from your drums a the float switch leaves only a couple of millimeters of residue. 


Removable screen built into the suction pipe guards your pumps from debris or crystals. more info

In addition, the bottom of the pipe is designed to accept an optional check valve for pumps that lose their prime.  more info

Uninterruptible battery power works despite power failures, can’t come unplugged.  Because the Drum Alarms don’t use any power until alarming, the batteries last for years.

more on battery power…

Secure compression tubing connection eliminates air leakage into your feed lines.

Models with built-in flow indicator allows you to verify flowrate and inspect the solution. (available on all models except DLK)

All models have adjustable depth with a convenient thumbscrew to adjust the depth in the drum. 


Any container size – from 1 gallon bleach bottle to large tanks. 

  • DLA series incorporates a slip-on cap for fast drum transfers.  Includes flowmeter.
  • DLAX is the same thing but without flowmeter.
  • DLP models include a 2″ NPS threaded plug. (the fine drum thread) The ‘X’ in DLPX means no flowmeter.
  • DLB models have a buttress thread. (coarse – 1.5 threads per inch) The ‘X’ in DLBX means no flowmeter.
  • DLK series has no liquid suction pipe – alarm only. Mounts in the 3/4″ NPT thread common on steel drums. Add an adapter to mount on the 2″ NPS or Buttress threaded bung.

Different materials available on all drumalarms. Polypropylene is used most of the time but Kynar or 316 stainless steel are available.  Contact us to order Kynar or Stainless Steel.


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Polypropylene, with suction pipe
Flowmeter option
Drum size
Tubing fitting size (O.D.)
Polypropylene, with suction pipe
Flowmeter option
Drum size
Tubing O.D. size
Polypropylene, with suction pipe
Flowmeter option
Drum size
Tubing O.D. size
Polypropylene, no suction pipe


Drum Size
With suction pipe, choose mount

Drum Size
Drum Mount
Tubing O.D. size


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] $107

Silencing Button/Low Battery Alert

The Drumalarm already comes with a Button that tests the unit: this option adds a circuit that allows an operator to silence the buzzer while LED continues to flash. Resets automatically. Includes a low battery warning.

[SL1] $45

Wireless Tank alarmWireless Transmitter & Receiver

Wireless transmitter is put inside the level alarm which sends a wireless signal to the receiver. Buzzer is in the receiver instead of at the tank.  A 10A relay is available in the receiver.
 more info
[W2] $275

Alternate Color LED

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


Liquid level alarm with power cordAC 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] $51

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. more info  
[PLC1] $76

Input power
Extra cable

Extra cable length over the standard length. Heavy 0.032″ jacket for superior durability, Stranded conductors x 24 gage.
[C-4] $0.80/ft

Weighted Pipe

Very dense chemicals like concentrated sulrfuric will cause the DLA drumalarms to float a bit in the drum.  The addition of some steel shot in the pipe, steel shot in drum alarmsealed in place with resin adds 400g to the pipe which keeps it down in any liquid. (this option is only applicable for DLA models)
[WP-1]     $24

Check Valve

Optional check valve for use with diaphragm pumps, it stops the liquid from draining out of the feeding pipe during transfer to a new container. Eliminates re-priming pump.
[CV-V or CV-E or CV-K] 

Different Buzzer Tones

Different buzzer tones to audibly identify different units. Hear the different tone types here. [BZ-xx]     $18  

Tone Type
Buzzer Volume Control

Sometimes our buzzers are too loud.  Snap-on “muffler” reduces the volume by 20 db and anywhere in between just by rotating the slots

[V-1]     $6