LIDoTT Sensor

LIDoTT® is a unique, UK and Worldwide, patented design.

On rising and falling water levels, LIDoTT® seamlessly transitions from ultrasonic level measurement to pressure depth measurement and back again – delivering continuous data.

  • Pressure sensor depth measurement (under water)
  • Integral temperature sensor
  • Ultrasonic level measurement
  • ATEX and IECEx Zone 0 certified
  • Battery powered MCERTS EDM monitor
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Description

LIDoTT® is a next generation water level monitoring sensor. It integrates ultrasonic level, pressure depth and temperature sensors into one compact device. LIDoTT® delivers high-quality data throughout normal dry-weather operating and either wet-weather or blockage induced surcharge conditions.

LIDoTT® is a unique, UK and Worldwide, patented design. On rising and falling water levels, LIDoTT® seamlessly transitions from ultrasonic level measurement to pressure depth measurement and back again – delivering continuous data.

Widespread deployment

As a water level monitoring sensor, LIDoTT® is cost efficient and therefore ideal for widespread deployment. It can be positioned in sewer networks, in domestic sewer manholes and throughout other water courses. When positioned in environments exposed to direct sunlight, a solar radiation shield must be used.

MCERTS accredited against the EA testing standards for Event Duration Monitoring, LIDoTT is the UK’s first battery battery powered MCERTS EDM monitor*.

Designed for Convenience

LIDoTT® is simple to install and ultra-low maintenance by design. It requires no external atmospheric breather for its pressure-sensor.

External battery and antenna options are available for challenging environments.

The enclosure is moulded from a carefully selected, resilient, naturally self-cleaning plastic polymer and is submersible. LIDoTT® is safe to use in all environments being ATEX and IECEx certified Zone 0.

Continuous Measurement

When the sewer network is stressed during storm weather events or by blockages, the LIDoTT® water level monitoring sensor automatically switches sensor mode from ultrasonic (level) to pressure (depth) as the liquid level rises, seamlessly delivering high-quality network management data. This transition is transparent to the external datalogging device which needs only a single recording channel.

Three sensors in one

Ultrasonic level sensor

The LIDoTT® sensor reliably detects subtle changes in “normal” operating conditions – accurately delivering, for example, small silt-induced variations in Depth of flow.

“In Air” Temperature sensor

Primarily used to calibrate distance measurement for changes in air density, temperature can optionally be delivered to the datalogger as a measured parameter.

Pressure sensor

With its 10m H2O operating range, the pressure sensor deals with exceptional Depth measurement. LIDoTT® delivers seamless transition from Level measurement – using its Ultrasonic sensor, to Depth measurement – using its Pressure sensor. The pressure-sensor is activated and measures rising depth before the Ultrasonic sensor blanking distance (dead-band) is reached.

How it works

As the liquid level rises, the ultrasonic sensor is in charge. Once the level reaches the bottom of the pressure sensor, pressure reading starts and a calibration sequence begins.

By the time the level enters the ultrasonic dead-band, the calibration sequence is complete and the calibrated pressure sensor takes over, delivering continuous, accurate depth data.

Data Communications

The LIDoTT® Sensor communicates using a number of serial protocols including Modbus* and will connect to many compatible data loggers.

  • Real time monitoring helps you better understand your sewer network
  • Automatic sensor switching enables continuous delivery of high quality network management data.
  • Data logging device needs only a single depth recording channel.
  • Designed to be compatible with many manufacturers’ data loggers.

*Available as a product variant

Specifications

ULTRASONIC LEVEL SENSOR

Type: Piezo-ceramic, temperature-compensated

Range: 0.000 – 1.500m

Accuracy: +/- 2mm

TEMPERATURE SENSOR

Type: High Precision CMOS Temperature device

PRESSURE SENSOR

Type: Isolated Silicon Diaphragm

Range: 0-10.00m

Accuracy: ±0.2% FS

ENVIRONMENTAL

Operating temperature: -20°C to +60°C.

Protection: IP68/NEMA6P.

Connectors: IP68 Mil – Spec.

Dimensions: 200mm(h) x 125mm(d) x 115mm(w)

APPROVALS

LIDoTT Sensor
ATEX Zone 0 certified CML 20ATEX2039X
IECEx Zone 0 certified IECEx CML 20.0019X
II 1 G, Ex ia IIB T4 Ga. Ta= -20°C to +60°C
MCERTS No: MC240396/00
MCERTS Ultrasonic sensor certified range: 1m
MCERTS Temperature Range: -10°C to +40°C

LIDoTT Smart
ATEX Zone 0 certified CML 21ATEX2097X
IECEx Zone 0 certified IECEx CML 21.0002X
II 1 G, Ex ia IIB T4 Ga. Ta= -20°C to +60°C
MCERTS No: MC240396/00

Patent Number: GB2591274

Case Studies

Proactive monitoring to reduce flooding and pollution events
Proactive monitoring to reduce flooding and pollution events
A UK water utility was looking to reduce sewer flooding and pollution events by monitoring known areas prone to incidents.
14 September 2021
FLOW MONITORING OF COAL MINE WATER
FLOW MONITORING OF COAL MINE WATER
Temporary flow monitoring was required at several sites following a blow-out of mine water
14 September 2021
Sewer Network Monitoring in Singapore
Sewer Network Monitoring in Singapore
We helped a channel partner provide a smart sewer network sensor to monitor levels under challenging conditions
14 September 2021
Detecting inflow and infiltration within a wastewater sewer network
Detecting inflow and infiltration within a wastewater sewer network
We were commissioned by a UK Water Company to investigate infiltration and inflow entering the waste water sewer network.
2 November 2020

Datasheets

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