SENSORS

We offer two types of sensors to determine liquid level: Radar, and submersible pressure.  We don’t deal in unreliable ultrasonic sensors, or other technologies. Both Radar and submersible pressure are very reliable. Radar has the advantage that it is non-contact whereas the sumbersible pressure sensor needs to be placed at the bottom of a tank and connected to the level gauge by a cable.

RADAR

Radar sensors measure liquid depth by sending electromagnetic waves of energy down to the liquid surface. The time it takes for the waves to bounce back is directly related to the depth of the liquid. Radar sensors are know for high accuracy and reliability.  They are known for their success in challenging environments that might include vapour, gases, temperature variations, extreme temperatures, extreme dust, wind, or foam.  This is becuase the signal reflects best from materials that have a high dielectric constant.  In fact, they will even sense through low-dielectric materials like plastics. So if the tank is plastic, then the tank could be monitored  without even needing a hole in the tank!

SUBMERSIBLE SENSOR

Submersible pressure sensors work by measuring the hydrostatic 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.  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.

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. The downside is that the cable is vulnerable in agitated tanks.

The default mounting in the tank is through a tank bushing in the top of the tank. (2″ NPT)