Description
Royce Aqua 22 portable MLSS and sludge blanket meter
The Royce Aqua 22 brings two essential wastewater measurements into one rugged portable instrument: mixed liquor/total suspended solids (MLSS/TSS) and sludge blanket interface depth.
Built for routine tank-side process checks, it combines an easy-to-handle display, submersible smart sensor and 10 m cable for aeration basins, secondary clarifiers and sequencing batch reactors. For product background, visit Royce’s Aqua 22 sludge blanket meter page.
Key features
Two measurements in one: infrared absorption measures MLSS/TSS, while a hydrostatic sensor identifies sludge blanket depth.
Field-ready design: a 320 g pistol-grip handheld with a bright, high-clarity LCD for outdoor work.
Smart sensor: calibration information is stored in each serialised sensor, simplifying compatible-sensor changes.
Traceable checks: save date- and time-stamped readings for up to nine locations.
UK support: PMA can advise on measurement points, cable length, delivery timing and quotation.
Why choose the Aqua 22?
The Aqua 22 is designed around the practical decisions treatment operators make every day: whether mixed liquor concentration is where it should be and where the sludge blanket sits. The 10 m polyurethane cable, IP65 handheld and IP68 sensor support routine checks where they matter. Explore the Royce portable sludge measurement range for additional product information.
Applications include
- MLSS monitoring in aeration basins
- Sludge blanket checks in secondary clarifiers
- Activated sludge process control
- Sequencing batch reactor monitoring
- Municipal and industrial effluent treatment
Technical specifications
| Measurement | MLSS/TSS and sludge blanket depth |
|---|---|
| Suspended solids principle | Infrared absorption |
| Suspended solids range | 0–20,000 mg/L |
| Depth range | 0–10 m hydrostatic interface depth |
| Accuracy / repeatability | ±5% / 1% |
| Saved locations | 9, date and time stamped |
| Cable | 10 m polyurethane cable |
| Protection | Handheld IP65; sensor IP68 |
| Handheld | 320 g; 240 × 110 mm |
Frequently asked questions
What does the Royce Aqua 22 measure?
It measures mixed liquor or total suspended solids using infrared absorption and identifies sludge blanket interface depth using a hydrostatic level sensor.
What measurement ranges does it cover?
The Aqua 22 measures suspended solids from 0 to 20,000 mg/L and sludge blanket depth from 0 to 10 m. The published specification gives ±5% accuracy and 1% repeatability.
Is it suitable for outdoor tank-side work?
Yes. The IP65 handheld is designed for one-handed use and the IP68 submersible sensor with 10 m cable is suited to routine wastewater process checks.
Can readings be saved by process location?
Yes. Results can be saved against nine locations with date and time information, helping teams compare conditions across tanks or treatment stages.
How is the sensor calibrated?
Each smart serialised sensor stores its own calibration information, allowing compatible sensors to be exchanged between Aqua 22 handhelds without recalibrating the handheld each time.
Where can I find further Royce information?
See Royce’s Aqua 22 page, or request a PMA quote for UK supply, delivery and application advice.
Get in touch with us
Reach out through our online contact form for reagent enquiries, and you’ll be automatically entered into our prize draw for a chance to win an Apple HomePod. It’s a simple way to ask your portable analyser questions while entering the draw.

