HI97101 for Bromine, Free and Total Chlorine, Cyanuric Acid, Iron LR, Iodine and pH


• CAL Check™
· Validate instrument performance at any time using CAL Check cuvettes made with NIST traceable standards. The CAL Check screen guides the user step-by-step through the validation process and user calibration.
On-screen tutorial mode with animations
· Guides users step-by-step through the measurement process
• Waterproof and floating IP67 case
• Unit of measure is displayed along with reading

• Built-in timer
· Built-in reaction timer that ensures consistency between tests.
• Error messages on display
· Alerts to problems including no cap, high zero, and standard too low
• GLP data
· Displays the last calibration date.
• Auto logging
• Battery status indicator
• Auto-shut off


• Advanced LED optical system
· Innovative optical design that utilizes a reference detector and focusing lens to eliminate errors from changes in the light source and from imperfections in the glass cuvette.
· LEDs have a much higher luminous efficiency, providing more light while using less power. They also produce little heat, which could otherwise affect electronic stability.

  • No warm up time before taking a measurement
  • Tutorial mode for step-by-step instructions
  • Uses either powder or cost saving liquid reagents
  • CAL Check




pHRange6.5 to 8.5 pH
Resolution0.1 pH
Accuracy @25°C (77°F)±0.1 pH
MethodPhenol Red method
Chlorine ,Free and TotalRange0.00 to 5.00 mg/L (ppm)
Resolution0.01 mg/L
Accuracy @25°C (77°F)±0.03 mg/L ±3% of reading
Methodadaptation of the USEPA method and Standard Method 4500-Cl G
Cyanuric AcidRange (all methods)0 to 80 mg/L (ppm)
Resolution (all methods)1 mg/L
Accuracy @25°C (77°F)±1 mg/L ±15% of reading
Methodadaptation of the turbidimetric method
IodineRange0.0 to 12.5 mg/L (ppm)
Resolution0.1 mg/L
Accuracy @25°C (77°F)±0.1 mg/L ±5% of reading
Methodadaptation of the EPA, DPD method
BromineRange0.00 to 10.00 mg/L (ppm)
Resolution0.01 mg/L
Accuracy @25°C (77°F)±0.08 mg/L ±3% of reading
Methodadaptation of the EPA, DPD method
Iron LRRange0.00 to 1.60 mg/L (ppm)
Resolution0.01 mg/L
Accuracy @25°C (77°F)±0.01 mg/L ±8% or reading
Methodadaptation of the TPTZ method
Measurement SystemLight Sourcelight emitting diode
Bandpass filter525 nm
Bandpass filter bandwidth8 nm
Bandpass filter wavelength accuracy±1.0 nm
Light Detectorsilicon photocell
Cuvette typeround 24.6 mm diameter (22 mm inside)
Additional SpecificationsAuto logging50 readings
Display128 x 64 pixel B/W LCD with backlight
Auto-offafter 15 minutes of inactivity (30 minutes before a READ measurement)
Battery type / Lifealkaline 1.5 V AA (3) / > 800 measurements (without backlight)
Environment0 to 50°C (32 to 122°F); 0 to 100% RH, non-serviceable
Dimensions142.5 x 102.5 x 50.5 mm (5.6 x 4.0 x 2.0″)
Weight380 g (13.4 oz.)