Analyzer 2850Si Silica 1/Pnl - Overview - METTLER TOLEDO

Analyzer 2850Si Silica 1/Pnl

Innovative Sub-ppb Silica Monitoring.The 2850Si 1/PNL Silica Analyzer offers fast, reliable and effective silica monitoring for power plant water chemistry. Maximize uptime and achieve superior performance in this compact analyzer with intelligent diagnostics.

Save Space, Increase Productivity

Make the most of valuable panel space by implementing or upgrading to this compact, space-saving analyzer, leaving room to install other analytics.

Achieve Low Total Cost of Ownership

Get efficient sub-ppb silica analysis using 75% less reagent than other analyzers. Monitored reagent usage allows for proactive inventory planning.

Ensure Optimal System Performance

Simplify maintenance for dependable operation with intelligent diagnostics, while accurate alarm verification boosts control room confidence.

Specifications - Analyzer 2850Si Silica 1/Pnl
Silica measurement range
0.5 ppb - 5,000 ppb
Phosphate measurement range
0.3 - 10 ppm
Operating Range (Temp.)
5 °C – 60 °C ; 41 °F – 140 °F
Ambient Operating Temperature
10 – 50 °C (50 – 122 °F)
Analog Output
Powered 0 / 4 – 20 mA, 22 mA alarm, 500 ohm max load, not for use with externally powered circuit
Analog Output Accuracy
± 0.05 mA
Analog Output Scaling
Linear, bi-linear, logarithmic (1,2,3,4 decades), auto ranging
Built-in sequencer
Digital Input
Remote start / stop of measurement cycle
Dimensions HWD
Panel: 533 x 368 x 270 mm (21.0" x 14.5" x 10.6")
Flow Rate
50 mL/min – 250 mL/min
Grab Sample Measurement
500 mL capacity
10 – 90 % non-condensing
Ingress Protection
IP66 / NEMA4X (Electronics)
Measurement Cycle Time
20 min typical; Adjustable ≥ 10 min
Measurement Parameter
Model Family
Operator Interface
Simultaneous display of silica concentration and measurement or auto-cal status; TFT color touchscreen
8 Powered 0 / 4 – 20 mA
Power Supply
100 – 240 VAC, 50 – 60 Hz, 100 W; on power loss all settings are retained without batteries
Power Supply (AC)
100 V – 240 V
Process Connection
Sample inlet: 6 mm or 1/4" OD tube SS compression fitting; Drain hose: 19 x 25.4 mm (¾ x 1"), 2 m (6 ft) length included
CE, cЯUus
Reagent Consumption
Approx 500 mL each per 3 months with 20 min measurement cycle time
Relay Contact(s)
4-SPST mechanical rated at 250 VAC, 3 A; 4-SPST Type Reed 250 VAC or DC, 0.5 A
4 digits with decimal, autoranging; 0.001 ppb in lowest range
Sample Flow rate
50 – 250 mL / min
Sample Pressure
0.3 – 7 bar (5 – 100 psig)
Sample Termperature
5 – 60 °C (41 – 140 °F)
Silica Measurement Accuracy
± 5 % of reading or ± 1 ppb, whichever is greater
Span calibration
Automatic per schedule; once per month, typical
16 kg (35 lbs)
Zero calibration
Automatic, every measurement cycle
Material Number(s)

Small Footprint, More Functionality

The 2850Si 1/PNL silica analyzer delivers early trace-level silica detection in a compact panel design for maximum installation flexibility. The advanced intelligent diagnostics system ensures peak performance with minimal operator supervision.

Fast and Efficient Silica Analysis

The 2850Si silica analyzer delivers accurate and reliable silica analysis with measurement updates every 10 minutes, but only uses 1/4 of the reagents compared to other silica analyzers, reducing overall reagent consumption and analyzer operating costs.

Eliminate Complexity with Intuitive UI

The 2850Si 1/PNL silica analyzer uses a built-in M800 Transmitter. The intuitive user interface guides you through quick setup and allows you to create shortcuts. Easy configuration helps meet specific display needs and simplifies training and operation.

Simplify Your Maintenance Strategy

Intelligent monitoring of reagent usage and tube/filter status enables proactive inventory and service planning. Simplify maintenance further by using METTLER TOLEDO expert services to ensure optimal performance throughout the life of the analyzer.

Better Manage Your Water Chemistry

The 2850Si 1/PNL Analyzer comes with 10+ different internal diagnostics and flexible communication options to leverage key outputs as part of our verified water chemistry technology that enables smart alarms.


White Paper

Phosphate Measurement White Paper
This white paper describes how control of silica and phosphate at power plants require different strategies. With reliable, actionable insights from o...



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Analyzer 2850Si Silica 1/Pnl
USP Class VI
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