Royce Aqua 22 portable sludge blanket and MLSS meter

Measure sludge blanket depth, mixed liquor suspended solids and TSS with one handheld instrument, wherever your wastewater process needs a reliable tank-side check.

Discuss your application

Three useful readings. One portable system.

The Royce Aqua 22 brings solids concentration and sludge interface measurement together for routine wastewater process checks. Operators can move between tanks with a lightweight, rechargeable handheld unit and a 10-metre submersible sensor cable.

Use it to compare mixed liquor in aeration basins, monitor settled sludge in clarifiers and record checks across different treatment locations.

0–20,000 mg/LMLSS and TSS range

0–10 mSludge blanket depth

10 mStandard sensor cable

Gloved hand reaching for a Royce Aqua 22 portable meter and sensor on a concrete ledge at a wastewater treatment site

What the Aqua 22 measures

Concentration and interface position answer different process questions. The Aqua 22 puts both measurements in the operator's hand.

MLSS and total suspended solids

Infrared absorption is used to assess suspended-solids concentration from 0 to 20,000 mg/L. Take immediate tank-side readings to compare mixed liquor, return sludge and other process points.

Explore the parameters

Sludge blanket depth

A hydrostatic level sensor provides depth information from 0 to 10 metres. Lower the sensor to locate the sludge interface and monitor how the blanket changes over time.

How the meter works

Field operation

Designed for checks at the tank side

One-handed operation.

A pistol-grip body and thumb-reach controls keep measurements practical on site.

Readable outdoors.

The high-clarity LCD is designed for bright sunlight, including use with polarised safety glasses.

Sensor-held calibration.

Compatible serialised sensors retain their calibration information and can be exchanged between handheld units without recalibrating the meter.

Traceable field records.

Store readings across nine locations with date and time stamps.

Built for the environment.

The handheld enclosure is rated IP65 and the submersible sensor IP68.

Where portable sludge measurements help

Use repeatable measurements at representative points across municipal and industrial wastewater treatment.

Aeration basins

Check mixed liquor suspended solids during routine activated-sludge process control.

Explore MLSS checks

Secondary clarifiers

Track the sludge interface and identify rising blanket levels before solids carryover.

Explore blanket checks

Sequencing batch reactors

Compare solids concentration and interface position through treatment and settling cycles.

Explore SBR guidance

Return activated sludge

Check return-sludge solids concentration to support process monitoring and control.

Explore RAS checks

Royce Aqua 22 technical details

Key specification points for an initial application review. Confirm critical requirements and current configuration with PMA before specifying an instrument.

Download the brochure

Royce Aqua 22 core specifications
MLSS / TSS range	0–20,000 mg/L
Sludge blanket range	0–10 m
Measurement principles	Infrared absorption; hydrostatic depth
Accuracy / repeatability	Approximately ±5% / 1%
Protection	IP65 handheld; IP68 sensor
Cable	10 m polyurethane, standard
Handheld weight	Approximately 320 g
Records	Nine locations, date and time stamped

Clear readings at each process point

Use the handheld display to review a reading at the tank side, then record the result against the appropriate location. The dedicated Royce Aqua 22 site has a fuller explanation of the measuring parameters and instrument features.

View measurement details View Aqua 22 features

PMA engineer reviewing a Royce portable meter in the field

Explore the dedicated Royce Aqua 22 site

See the full product overview, measurement principles and application guidance. PMA supplies and supports the Royce Aqua 22 in the UK.

View the Aqua 22 site How the meter works

Let’s talk about your application.

Speak to the PMA team about your instruments, reagents or service requirements. Tell us what you need, and we’ll help you find the right next step.

Advice for your application. Find the right instruments, sensors and chemical reagents for your process.
Practical service support. Discuss commissioning, calibration, maintenance or an instrument issue with our team.
Clear next steps. Ask a technical question or request a callback, with your site and measurements in mind.
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