Hanna Instruments-839800 25 Vial Thermo-Reactor
The Hanna Hanna Instruments-839800 thermo-reactor is an easy to use test tube heater with the capacity to perform up to 25 simultaneous digestions.
Complete with a countdown timer, it can be used for timed or infinity testing procedures.
Robust and durable, the main body is machined from a single block of metal.
Temperature within the block is controlled using a sophisticated electronic thermostat and can be verified by placing a thermometer in the temperature well provided.
The reactor is equipped with 6 pre-defined and 2 user-defined °C profiles.
Dedicated temperature profiles for COD and total phosphorus reactions are pre-set to 150°C.
The total nitrogen analysis temperature is pre-set to 105°C
In adjustable temperature mode (50 to 150°C), the heater can be used for other samples that require different digestion temperatures.
Key features:
Heater block temperature is continuously evaluated and displayed on the LCD
Low temperature alert indicates that temperature is below set value
High temperature alert warns when temperature rises above the set value
Reactor has a thermal fuse that prevents overheating by disabling the heater
Countdown timer shows time remaining until heating element shuts off
A three hour countdown timer is ideal for timed digestion
The sond of a 'beep' indicates when the timer has expired and the heating element turns off
To operate in infinity mode, the timer can be used without the shut-off feature
Visual power indication Green LED indicates power on Blinking red LED warns if heater exceeds 50°C Yellow LED indicates heating is active
For optimum safety, the block heater should always be used with a safety shield or other physical barrier placed between samples under test and operator Accessories Stainless steel test tube rack to hold 25 COD tubes
HI 740216 Bench top safety shield for use with Hanna Instruments-9800 series COD reactor/digester - Hanna Instruments-740217
Specifications
| Temperature of Reaction | 105°C or 150°C | |
| Temperature Stability | ±0.5°C | |
| Temperature Range | -10°C to 160°C | |
| Temperature Accuracy | ±2°C (@ 25°C) | |
| Capacity | 25 vials (dia 16 x 100 mm), 1 receptacle for a stainless steel reference thermometer | |
| Warm-up Time | 10 to 15 minutes, depending on selected temperature | |
| Operating Mode | timed (0 to 180 minutes) or infinity mode | |
| Block | aluminium | |
| Environment | 5 to 50°C | |
| Power Supply | Hanna Instruments-839800-02 230 Vac | |
| Dimensions | 190 x 300 x 95 mm (7.5 x 11.8 x 3.7") | |
| Weight | approximately 4.8 kg (10.6 lb) | |
| Ordering Information | Hanna Instruments-839800 is supplied with a power cable and instruction manual. | |
| Warranty | 2 years |
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.