Lovibond MD 640 Photometer and Fluorometer
Product Name - MD 640
The Lovibond® MD 640 is an enhanced version of the MD 610 photometer.
Offering additional fluorescence capability for the determination of PTSA and fluorescein in water systems.
Covers more than 120 important methods for water analysis
Supplied without reagents (please specify the reagents or parameters required at time of order)
Test/Range
| Acid Demand | 0.1-4 mmol/l |
| Active Oxygen | 0.1-10 mg/l |
| Alkalinity P | 5-300 mg/l |
| Alkalinity Total M | 5-200 mg/l; 5-500 mg/l |
| Aluminium | 0.01-0.3 mg/l; 0.01-0.25 mg/l |
| Ammonia | 0.02-1 mg/l; 0.01-0.8 mg/l |
| Ammonia HR | 1-50 mg/l |
| Ammonia LR | 0.02-2.5 mg/l |
| Boron | 0.1-2 mg/l |
| Bromine | 0.05-13 mg/l |
| Chloride | 0.5-25 mg/l |
| Chlorine | 0.01-6 mg/l; 0.02-2 mg/l; 0.02-4 mg/l; 0.1-10 mg/l; 0.1-8 mg/l |
| Chlorine (total) | 5-200 mg/l |
| Chlorine Dioxide | 0.02-11 mg/l |
| COD | 0-150 mg/l; 0-1500 mg/l; 0-15000 mg/l |
| Copper | 0.05-4 mg/l; 0.05-5 mg/l |
| Cyanide | 0-160 mg/l |
| Cyanuric Acid | 0-160 mg/l |
| DEHA | 20-500 µg/l |
| Dissolved Oxygen | 10-800 µg/l |
| Fluorescein | 0-400 µg/l |
| Fluoride | 0.05-2 mg/l |
| Calcium Hardness | 0-500 mg/l; 50-900 mg/l |
| Hardness | 2-50 mg/l; 20-500 mg/l |
| Hydrazine | 0.05-0.5 mg/l; 0.01-0.6 mg/l; 0.01-0.7 mg/l |
| Hydrogen Peroxide | 0.03-3 mg/l; 1-50 mg/l; 40-500 mg/l |
| Iodine | 0.05-3.6 mg/l |
| Iron | 0.02-1 mg/l; 0.02-3 mg/l; 0.02-1.8 mg/l; 0.03-2 mg/l; 0.1-10 mg/l |
| Manganese | 0.05-5 mg/l; 0.2-4 mg/l; 0.01-0.7 mg/l; 0.1-18 mg/l |
| Molybdate | 0.05-5 mg/l; 1-50 mg/l; 0.5-66 mg/l; 1-100 mg/l |
| Monochloramine | 0.04-4.50 mg/l; 0.01-0.50 mg/l |
| Nitrate | 0.08-1 mg/l; 1-30 mg/l |
| Nitrite | 0.01-0.5 mg/l; 0.01-0.3 mg/l |
| Nitrogen Total | 0.5-25 mg/l; 5-150 mg/l |
| Ozone | 0.02-2 mg/l |
| Ortho-phosphate | 0.05-4 mg/l; 1-80 mg/l; 0.06-2.5 mg/l; 0.06-5 mg/l; 5-40 mg/l; 0.05-5 mg/l |
| pH Value | 5.2-6.8; 6.5-8.4; 8.0-9.6 |
| PHMB | 2-60 mg/l |
| Phosphate Total | 0.02-1.1 mg/l; 0.06-3.5 mg/l; 0.1-10 mg/l; 5-80 mg/l |
| Phosphonate | 0-125 mg/l |
| Platinum-Cobalt / Hazen | 0-500 mg Pt/l |
| Polyacrylate | 1-30 mg/l |
| Potassium | 0.7-12 mg/l |
| PTSA | 0-1000 µg/l |
| Silica | 0.05-4 mg/l; 0.1-1.6 mg/l; 0.1-8 mg/l; 1-90 mg/l |
| Sodium Hypochlorite | 0.2-16 % |
| Sulphate | 5-100 mg/l |
| Sulphide | 0.04-0.5 mg/l |
| Sulphite | 0.1-5 mg/l |
| Suspended Solids | 0-750 mg/l |
| Turbidity | 0-1000 FAU |
| Urea | 0.1-2.5 mg/l |
| Zinc | 0.02-1 mg/l; 0.1-2.5 mg/l |
• High quality results due to interference filters and long-life LEDs
• Automatic wavelength selection
• Bluetooth® data transmittance to Lovibond® AquaLX® App
• Covers more than 120 important methods for water analysis such as aluminium, chlorine, COD, bromine, chlorine dioxide, copper, iron, molybdate and phosphate
• Advanced data management via AquaLX® App
• Portable and easy handling
• Robust and water proof
• 4 batteries
• 3 round vials each 24 and 16 mm ø(black lid)
• 1 adapter each for 16 mm and 13 mm vials
• Plastic stirring rod 13 cm, brush 11 cm, syringe 5 ml, screw driver
• Warranty information
• Certificate of Compliance
• Instruction Manual
| Display | |
| Interfaces | Bluetooth® 4.0 RJ45 socket for internal updates |
| Optics | LEDs, Interference Filters (IF) and photo sensor in transparent sample chamber. Wavelength specifications of interference filters: 430 nm Δ λ = 5 nm 530 nm Δ λ = 5 nm 560 nm Δ λ = 5 nm 580 nm Δ λ = 5 nm 610 nm Δ λ = 6 nm 660 nm Δ λ = 5 nm |
| Wavelength Accuracy | ± 1nm |
| Photometric Accuracy | 2% full scale (at 20 ° C to 25 ° C) |
| Photometric Resolution | 0.005 A |
| Operation | Acid and solvent resistant touch sensitive keypad; audible feedback via integrated beeper |
| Power Supply | 4 x AA batteries; operating time approx 26 hours continuous or 3500 tests |
| Auto Off | Approx 20 minutes after last keypress with audible signal |
| Dimensions | Unit 210 x 95 x 45 mm Carry case 395 x 295 x 106 mm |
| Unit Weight | 450g |
| Ambient Conditions | 5-40 ° C, 30-90% rel humidity (non condensing) |
| Memory Capacity | Approx 500 data sets with time, date, sample ID |
| Conformity -CE |
|
Frequently Asked Questions
Clear answers to help you choose the right water testing solution with confidence
Which brands of water testing kits do you supply?
Do you provide kits for both home and professional use?
Yes — whether you’re a pool or spa owner, aquarium keeper, utility company, or a university laboratory, we have the right solution for your needs.
Can I arrange servicing or calibration for my photometer?
Absolutely. We also provide servicing and calibration to keep your photometers accurate and reliable.
How quickly do you dispatch orders?
Orders placed before 2:30 pm (Monday–Friday) are dispatched the same day. We also ship on Saturdays for your convenience.
Which couriers do you use for delivery?
We deliver through UPS, DPD, and Royal Mail. You can also choose to upgrade to next-day delivery at checkout.
What is your return policy?
We accept returns within 14 days of delivery provided the items are unused, in their original packaging, and in resalable condition. Please contact our team before returning any items.
Can I place bulk or business orders?
Yes, we welcome bulk, trade, and institutional orders. For tailored pricing or large quantities, please get in touch with us directly.
How can I get help if I’m unsure which kit to buy?
You can call us at 📞 +44 (0)115888 2726 and our team will guide you in choosing the most suitable kit for your needs.