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SP510 Hardness Analyzer (1 mg/L trip point)

SP510 Hardness Analyzer (1 mg/L trip point)
Product #: 5410001
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Continuous hardness detection

The SP510 monitor detects hardness breakthrough when the capacity of a water softener is exhausted, immediately signaling the need for regeneration. Alarm points are 0.3, 1, 2, 5, 10, 20, 50, and 100 ppm (expressed as mg/L of CaCO3) and are selected by choosing the appropriate model. Easy to read LED indicators show a simple “HARD” or “SOFT” sample status. You can also use SP510’s built-in alarm relay to actuate an external annunciator.

Low maintenance requirements

The SP510 samples water every two minutes, operating automatically for up to 60 days. It is virtually maintenancefree, requiring only about 15 minutes every two months to replenish and standardise the reagents. Replace tubing in the pump system every six months.

Rugged, lightweight, and self-contained

The SP510 monitor makes your water softening system more eBcient and less costly. It eliminates the guesswork so your softener is regenerated only when needed. Regeneration based on calculation or set times can be replaced with continuous monitoring and automatic control, lowering reagent consumption.

Rugged, lightweight, and self-contained

The SP510 case is made of ABS plastic which is lightweight, corrosion-resistant, and shatterproof. This sealed case is IP62-rated and has a hinged door for easy access to internal components.

What's in the box?

SP510 Hardness Monitor, two month's supply of reagents, an installation kit, a maintenance kit, Hach user manual.


Accuracy: ±25% of set point value
Alarm: 2 consecutive cycles above set point activate alarm.
1 cycle below set point cancels alarm.
Alarm type: LED indicators, Hard or Soft
Alarm points: 1 mg/L of CaCO3 trip point
Certifications: NRTL certified to UL and CSA standards, and CE approved
Cycle Time: 2 average
Dimensions (H x W x D): 419 mm x 318 mm x 178 mm
Enclosure Rating: IP62
Fitting Type: Inlet: ¼-in. OD tube quick-disconnect fitting
Outlet: ½-in. ID flexible hose
Light Source: LED with peak wavelength of 610 nm
Maintenance Interval: Standardize and replenish reagents every 2 months using EDTA or high-level sample
Replace pump tubes every 6 months
Material Enclosures: ABS plastic, large plastic windows to view alarm and reagents level
Measurement Method: Colorimetric
Mounting: Wall mount
Operating Humidity: 5 - 95%, non-condensing
Operating Temperature Range: 5 - 40 °C
Output: 1 SPDT relay
Power Requirements (Hz): 50/60 Hz
Power Requirements (Voltage): 115/230 V AC
Reagent Consumption: 500 mL each indicator and buffer every two months
Repeatability: ±10% of set point value in 0.3 - 2 mg/L ranges;
± 4% of set point value in 5 - 100 mg/L ranges
Sample Flow Rate: 50 - 500 mL/min
Sample Pressure: 0.07 - 0.34 bar (0.10 bar is optimum)
Sample conditioning: 0.10 - 5.17 bar
Storage Conditions: -40 to 60 °C (-40 to 140 °F)
Weight: 11.3 kg