Water Level Sensors

PLS 500

The OTT PLS 500 is a robust & accurate water level sensor designed for measuring:

• Water Level (vented)
• Pressure (vented)
• Temperature

Unlike other water level sensor on the market, the PLS 500 incorporates a suite of additional internal sensors that continuously measure instrument health:

• Position of Sensor
• Internal Relative Humidity

Combined with innovative metadata, this water level logger allows data & instrument performance to be validated remotely, providing Operators with confidence that logged data is accurate.

PLS 500 Models

Two PLS models are available:

• PLS 500 Sensor (SDI-12)
• PLS 500 Sensor (Modbus RTU)

Available measurement ranges include:

• 0m – 10m
• 0m – 20m
• 0m – 40m
• 0m – 100m

Automatic Pressure
Automatically compensates logged data for changes in atmospheric pressure via the internal barometric pressure sensor (vented cable).

Position Sensor
Remotely monitors probe movement with an internal inclinometer, enabling warnings if sensor position has changed due to in-stream events via automatic status flags or direct measurement.

Internal Humidity Sensor
An integrated internal humidity sensor outputs automatic status flags or direct humidity measurements notifying Operators when pressure measurements have been impacted by condensation.

Additionally, the built in micro-controller automatically compensates for changes in:

• Temperature
• Gravitational Acceleration
• Water Density

Construction & Cables

Designed with continuous deployment in mind, the PLS incorporates a ceramic pressure sensor within a salt water resistant 904L stainless steel housing.

All PLS 500s are manufactured with custom cut vented cables.  Users to specify cable length upon order.

Communication Options

Common communication protocols (SDI-12 and Modbus RTU) allow for seamless integration with external data loggers.

Discuss the various communication options with Aqualab today!

This product is manufactured by OTT and proudly represented by Aqualab Scientific.