DIGITAL TANK LEVEL GAGE displays liquid level and give alarms if level is out of range.

Liquid Level Gage

Liquid level gage for tanks displays the level in the tank with a bar graph and numerical display.

The digital display is connected to a PTFE submersible sensorTank Level gage located in your tank.  The sensor responds to changing liquid level by indicating with a bar graph and numerical reading. It is suitable for almost any chemical.

There are four independent alarm points that can be configured any way you wish. Examples of different actions include buzzer, and stack lights (red, yellow, green) at the tank, and also remote singaling like text messages, email, or wireless communication etc.

The installation consists of simply dropping the sensor to the bottom of your tank, and plug in the digital display.  (we have already set the units from the factory)

The digital Level Gage LG–1 can work with any sensor that provides a 4-20mA output. But we prefer either submersible sensors or RADAR for the reasons outlined below.


Our Level Gauge can work with any sensor that provides a 4-20mA output. Sensors that can provide this output for sensing continuous level are: magneto-strictive, (float switch) capacitance, ultrasonic, RADAR, and pressure.  Of these  choices, the sensors we prefer are submersible pressure sensors, and RADAR.  (there are some others like optical sensors but they are completely unsuitable)


RADAR Radar Tank Level Sensorsensors are non-contact and don’t require any intrusion into the process liquid. They are accurate to 1 mm and are not affected by dusts, vapors, foams, or turbulence. In fact they are sutiable for solids as well. They do have to be mounted with the internal tank structure in mind so stuctures in the tank don’t interfere. But with a narrow beam angle of 8º this isn’t usually a problem.

So why not ultrasonic sensors instead since they are cheaper?  The simple answer is that they are not reliable enough. Under perfect conditions they can work, but in real world tanks they are not reliable enough for us. We tested ultrasonics more than a decade ago and we have never sold them because they don’t meet our standards fo reliability. Here is some more information on the differences.


Submersible level sensors (or hydrostatic sensors) determine liquid height by measuring theSubmersible Pressure Sensor pressure on the sensor due to the weight of the liquid above it. This an established technology noted for its high reliability, low installation cost, and simple engineering. It is one of the most popular methods of liquid level measurement. Submersible level sensors may be used in almost all liquid media, from aggressive chemicals to pastes and sludges, providing reliable level measurement in the most challenging conditions.

Unlike ultrasonic sensors, submersible sensors are immune to turbulence, foam, fouling, obstructions. They don’t need to be tuned or calibrated, and they don’t need to be carefully positioned.  Finally, there is no “dead zone” to worry about.



Liquid Level Gage.

Liquid Level Gage


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


RADAR Sensor

Radar Tank Level SensorNon-contact sensor is not affected by turbulence, dusts, foam.

[SN-R]     $585 

Submersible SensorSubmersible Pressure Sensor

Responds to changes in pressure at the bottom of youro tank. PTFE housing and cable. Default cable length matches the length inside the tank.

[SN-S]     $285  

Cable length in tank

WIFI communication.WiFi module

Sends a message to your email or text message to your phone. Easy setup. No recurring fees. More info.

[WF-1]     $185