Hanna Marine Master Multiparameter Photometer
All‐in‐one photometer for precise marine water quality testing

- Tests 9 essential marine water parameters with lab‐grade accuracy
- User‐friendly design
- Durable, portable, and waterproof, ideal for reef tanks and marine research
What is the Hanna Marine Master Multiparameter Photometer?
The Hanna Marine Master Multiparameter Photometer is a handheld, professional‐grade Photometer designed to deliver fast, accurate measurements of critical water parameters in saltwater aquariums and marine biology settings. It combines lab‐level accuracy with an intuitive, portable design for both beginners and advanced users.
Key Features:
- Measures 9 critical marine parameters with lab‐quality accuracy
- Advanced optical system with LED and interference filter for precision
- Portable, waterproof, and floats if dropped in water
- No warm‐up time; ready to measure instantly
- On‐screen tutorial mode for step‐by‐step guidance
- CAL check system for easy performance validation and calibration
- Auto‐off and low battery warning features
- Data logging for the last 50 measurements
- Durable, shock‐resistant design with positive cuvette locking system
These features make the HI-97105 especially useful for maintaining reef health, preventing imbalances, and optimising water conditions for coral growth and marine life sustainability.
What are the features and benefits of the HI-97105 for marine testing?
The Hanna Marine Master Multiparameter Photometer simplifies comprehensive marine water testing by covering multiple essential parameters with one device. With an intuitive interface, on‐screen instructions, and built‐in safeguards like CAL check and low battery detection, it's ideal for reliable, long‐term monitoring in both home and professional settings.
Parameters Measured:
- Marine pH
- Ammonia
- Alkalinity
- Calcium
- Magnesium
- Nitrate (Low and High Range)
- Nitrite (Ultra Low Range)
- Phosphate (Ultra Low Range)
Included with the HI‐97105:
- 2 sample cuvettes with caps
- 2 plastic stoppers
- 3 AA (1.5V) batteries
- Instruction manual and meter quality certificate
Alkalinity, Marine Range | 0.0 to 20.0 dkH / 0 to 357 ppm (as CaCO3) |
Alkalinity, Marine Resolution | 0.1 dkH |
Alkalinity, Marine Accuracy | ±0.3 dKH ±5% of reading at 25°C / ±5 ppm ±5% of reading at 25°C |
Alkalinity, Marine Method | Colorimetric ‐ Yellow to greenish‐blue colour range |
Ammonia, Marine Range | 0.00 to 2.50 ppm (as NH3) |
Ammonia, Marine Resolution | 0.01 ppm |
Ammonia, Marine Accuracy | ±0.05 ppm ±5% of reading at 25°C |
Ammonia, Marine Method | Adaptation of the Salicylate Method |
Ammonia, Marine LED | 610 nm |
Calcium, Marine Range | 200 to 600 ppm |
Calcium, Marine Resolution | 1 ppm |
Calcium, Marine Accuracy | ±6% of reading at 25°C |
Calcium, Marine Method | Adaptation of the Zincon Method |
Magnesium, Marine Range | 1000 to 1800 ppm (as Mg2+) |
Magnesium, Marine Resolution | 5 ppm |
Magnesium, Marine Accuracy | ±5% of reading at 25°C |
Magnesium, Marine Method | EDTA Method with calmagite indicator |
Magnesium, Marine LED | 610 nm |
Nitrate Range | 0.00 to 5.00 ppm / 0.0 to 75.0 ppm (as NO3‐) |
Nitrate Resolution | 0.01 ppm / 0.1 ppm |
Nitrate Accuracy | 0 to 200 ppb (as NO2‐‐N) |
Nitrate Method | Zincon / Colorimetric (pink/violet tint) |
Nitrite, Marine ULR Range | 0 to 200 ppb (as NO2‐‐N) |
Nitrite, Marine ULR Resolution | 1 ppb |
Nitrite, Marine ULR Accuracy | ±10 ppb ±4% of reading at 25°C |
Nitrite, Marine ULR Method | EPA Diazotization Method 354.1 (pink tint) |
pH Range | 6.3 to 8.6 pH |
pH Resolution | 0.1 pH |
pH Accuracy | ±0.2 pH at 25°C |
pH Method | Phenol Red Colorimetric Method |
Phosphate, LR Range | 0.00 to 0.90 ppm |
Phosphate, LR Resolution | 0.01 ppm |
Phosphate, LR Accuracy | ±0.02 ppm ±5% of reading at 25°C |
Phosphate, LR Method | Ascorbic Acid Method (blue tint) |
Light Source | Light Emitting Diode (LED) |
Light Detector | Silicon Photocell |
Bandpass Filter Bandwidth | 8 nm |
Bandpass Filter Wavelength Accuracy | ±1.0 nm |
Logging | 200 readings |
Power Supply | (3) 1.5V AA Alkaline |
Battery Life | > 800 measurements (no backlight) |
Auto‐off | After 15 minutes of inactivity / 30 minutes before READ |
Environment | 0 to 50°C 0 to 100% RH, non‐serviceable |