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HydroTest® COD System HTCOD

The HydroTest COD System HTCOD is designed for the determination of chemical oxygen demand index (COD) using the small-scale sealed-tube method.

The industry standard dichromate method can be considered as an estimate of theoretical oxygen demand. With a wide measuring range from 0 – 15,000 mg/L O2, the HTCOD is ideal for waste water testing, offering a small handheld photometer with two LED light sources housed inside a waterproof sample chamber.

The highly-sensitive equipment is compatible with mercury-free tube tests, with optional chloride compensation to remove interference, and utilises the popular photometric determination method.

Standard solutions can be used to verify operation and accuracy of the instrument.

The thermoreactor is compatible with other products in the HydroTest range, and can also be utilised for tube test digestion of TOC, total Chromium total Nitrogen and total Phosphate.

The thermoreactor operates at three pre-set temperatures, with three pre-set reaction times, and offers automatic switch-off functionality with audible alarm.


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Product Description


Features & benefits of HTCOD

Feature Benefit
Small-scaled sealed-tube dichromate analysis method Industry standard mercury-free testing compliant with latest environmental protection legislation
Extensive detection range Lower ranges (0 – 150, 0 – 1,500) are perfectly suited to drinking water applications, whilst the higher range (0 – 15,000) is ideal for waste water testing
Flexible thermoreactor design with safety screen Suitable for a full range of test tube digestion methods, fully compatible with health and safety requirements
Fast, effective analysis Pre-measured tube tests contain requisite reagent – just add water sample, heat in thermoreactor, and measure with photometer
Waterproof, chemically resistant photometer housing Perfect for use in a busy laboratory environment, with protection from accidental chemical spills

Technical Specifications

COD (LR) 0 – 150 mg/L O2
COD (MR) 0 – 1,500 mg/L O2
COD (HR) 0 – 15,000 mg/L O2
Technical specifications (Photometer):
User Interface 4 digit backlit LCD, 4 button rubber keypad
Operation Analytical principle: Single parameter fixed wavelength visible absorption photometer
Wavelength accuracy: ± 1 nm
Dual LED light source with long term stability
Wavelengths: λ1 = 610 nm, λ2 = 430 nm
Accuracy: 3% FS @ 20 – 25°C
Resolutions: 0.01Abs
Power supply: 4 x AAA/LR6 alkaline cells, provides 17 hours operation, > 5000 tests
Environmental Operating temperature: 5 - 40°C
Storage temperature: 0 - 70°C
Humidity: 30 – 90% (Non-condensing)
Chemically-resistant housing
Data 16 data sets
Data download via IR link (required T2o PC-Link module)
Approvals CE conformity; IP68 water resistance
Dimensions TBA
Weight TBA
Technical specifications (Thermoreactor):
Selectable temp 100 / 120 / 150 °C
Temperature stability ± 1 °C at probe
Selectable time 30 / 60 / 120 / min. and continuous operation (∞)
Heating up time From 20°C to 150°C in 12 min.
Power supply 230 V / 50-60 Hz or 115 V / 50-60 Hz (switchable)
Power 550 W
Probe type Pt100 A class
Regulation Microprocessor
Overheating protection At the aluminium block at 190 °C
Beeper Max. 88 dB (piezo buzzer)
Aluminium block 24 holes, 16.2 mm ± 0.2 mm
User interface Splashproof membrane keypad, LED indicators
Materials Housing - ABS
Protection grid - PPS
Lid - PC
Block insert - PBT
Heating block  - Aluminium
Dimensions 248 x 219 x 171 mm
Weight 3.9 Kg
Environmental conditions 10 – 40 °C 
Max. 85 % rel. humidity
Approvals CE conformity

Additional Information

Additional Information

Pack Qty 1
Featured Product No
Manufacturer's Suggested Retail Price + VAT £2,208.00