Silica analyzer

Rapid automated measurement of trace silica in boiler water and purified water treatment systems.

In order to efficiently drive turbines using high-temperature and high-pressure steam in power plants such as thermal and nuclear power plants, it is crucial to manage silica (SiO2), which can be a major cause of scaling. Combining HORIBA's extensive track record and technical expertise, maintaining the stability, reliability, and maintainability of our previous models, while enhancing usability through the introduction of a touch panel interface.


Division: Process Water
Manufacturing Company: HORIBA Advanced Techno Co., Ltd.

Repeatability of ±2% full-scale (F.S.) with a 5-minute measurement

Quick acquisition of highly repeatable measurements can be obtained.

Wide measurement range

Capable of measuring a wide range, from a high-sensitivity range of 0 to 10 μg/L to a high-concentration range of 0 to 5.0 mg/L.

Anomaly detection function

Detects operational anomalies such as abnormal sample water or reagent injection, calibration issues, concentration limit anomalies, and light source abnormalities.

Automatic measurement cycle switching

Automatically switches the measurement cycle from a minimum of 5 minutes for concentrations above the set concentration to a longer cycle for concentrations below the set concentration. Reduction of running costs becomes possible through actions such as minimizing reagent usage.

Improved operability

Featuring a color LCD with touch panel operation.

Dimensions600 (W) mm × 750 (H) mm × 1600 (D) mm
MassApproximately 130 kg
Power supply100 V AC ±10%, 50/60 Hz
(Option) 110 V AC/115 V AC/120 V AC/220 V AC/230 V AC/240 V AC/
240 V AC±10%, 50/60 Hz
Approximately 500 VA
  • 0 μg/L to 10 μg/L/0 μg/L to 100 μg/L
  • 0 μg/L to 50 μg/L/0 μg/L to 500 μg/L
  • 0 μg/L to 100 μg/L/0 μg/L to 1000 μg/L
  • 0 μg/L to 200 μg/L/0 μg/L to 2000 μg/L
  • 0 mg/L to 0.50 mg/L/0 mg/L to 5.00 mg/L
    (Either is specified when receiving the order)
(Unit setting: μg/L)
0.1 μg/LData<100 μg/L
1 μg/L100 μg/L≦Data≦5000 μg/L
(Unit setting: mg/L)
0.0001 mg/LData<0.1 mg/L
0.001 mg/L0.1 mg/L≦Data≦5.0 mg/L
Repeatability±2% of the full scale
Molybdenum blue method
Number of
1 point to 4 points (specified when receiving the order)
Measurement time5 minutes
Measurement cycleSpecified as desired between 5 minutes and 999 minutes
CalibrationZeroEach measurement
SpanEqualizing filter method
replacement cycle
Once a week (reagent storage: 30℃ or below)
0℃ to 45℃
Ambient humidityRelative humidity 85% or less (no condensation)
  • Indoor installation type
  • Transient overvoltage of main power supply: Overvoltage Category II
    (EN61010-1), Pollution Degree 2
  • Flat surface that is not subject to vibration and external shock
  • No dust, mist, or corrosive gas is present in the atmosphere
  • Under atmospheric pressure
  • No direct sunlight
  • Well-ventilated area
Sample conditionsTemperature2℃ to 40℃ (36°F to 104°F)
Flow rate0.5 L/min to 1.0 L/min
Pressure0.02 MPa to 0.20 MPa
pH value11.0 or less
Coexisting phosphate
ion concentration
20 mg/L or less
However, no phosphate ions are permissible for the 0 μg/L to 10 μg/L/
0 μg/L to 100 μg/L range (ultrapure water specification)
Analog outputConcentration output
4 mA DC to 20 mA DC or 0 mA DC to 16 mA DC, selection setting in the operation section
Marker/hold output, selection setting in the operation section
Maximum load of 500 Ω or less, input/output isolation type, nonisolated between channels
Option: 0 V DC to 1 V DC, 1 V DC to 5 V DC
Contact outputStandarda-contact output (b-contact can be specified when receiving the order)
Contact rating250 V 3 A AC, 30 V 3 A DC
Measurement line
Meas., Standby, Maintenance, External control,
Sync. Signal, Equipment Err., Power, etc.
Measurement line
Line, Sample Lack, Abnormal concentration,
Contact inputNo-voltage a-contact input (open collector is available)
Isolated input: Common to the (-) side
ON resistance100 Ω (max.)
Open-circuit voltage26 V DC (max.)
Short-circuit current13 mA DC (max.)
Measurement line
Meas. Start, Cal. Start
Measurement line
DisplayColor touch panel type liquid crystal
Memory functionMeasurement valueMemory for over 1 year
Alarm history500 events
Calibration history100 events
Operation history100 events
USB external memory device can be used
OptionFilter for sample line
(For Line 1 to Line 4)

By installing about 5 μm cartridge filter in the upstream of the overflow tank, it is possible to prevent iron rust, etc. from entering the equipment.

  • Up to 2 filters can be built into the product.
  • If the optional filter is selected for the product of 3 or 4 measurement
    points, the filter is not built into the product but is delivered individually as a single filter.
  • If a step-down transformer is installed (power supply voltage is other
    than 100 V AC), a filter cannot be built into the product.
Flowmeter for sample
(For Line 1 to Line 4)
By adding this, you can accurately measure the sample supply flow rate.
  • When installing the analyzer, give careful consideration to its special characteristics and be sure to provide an environment where the equipment can operate properly.
  • Take appropriate action so that no damage will occur even when the equipment no longer operates correctly due to deterioration or the operational conditions of the equipment, or any unexpected phenomenon.

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