Hangzhou Qiwei Instrument Co., Ltd. is one of the leading manufacturers and suppliers of benchtop tp meter in China. With a professional production team, we are able to meet the needs of the majority of our customers. Welcome to wholesale bulk benchtop tp meter in stock here from our factory. We also accept customized orders.
product key technologies

The Benchtop TP Meterr runs on photoelectric colorimetry, a method that uses a microcomputer to read light absorption instead of relying on someone's eyes. Traditional visual colorimetry often gives inconsistent results because different people see colors differently. This instrument removes that problem completely - what you get is objective, repeatable data every time.
Inside the unit, an optical sensor measures how much light passes through the reacted sample. The microcomputer then calculates the total phosphorus concentration. The whole process is automated once you place the cuvette in the holder. No guesswork, no manual comparison charts.
Why Total Phosphorus Matters
Phosphorus is a major cause of eutrophication in lakes and rivers. Even small amounts can trigger algae blooms, which then die off and deplete oxygen - killing fish and harming aquatic life. That's why environmental regulations strictly limit phosphorus discharge from wastewater plants and industrial facilities. Reliable testing is the first step toward compliance.
What Samples Can Be Tested
This analyzer handles a wide variety of water types. You can use it for:
● Industrial effluent
● Municipal sewage
● Surface water (rivers, lakes)
● Groundwater
● Other aqueous samples where total phosphorus needs to be measured
It's common in environmental labs, sewage treatment plants, factory quality control departments, universities, and research institutes.
Ease of Use in the Lab
Designed to sit on a bench and stay there, the TZL-1 has a solid metal housing and a straightforward keypad. The digital screen shows readings clearly. Most technicians learn to operate it in under 15 minutes.
Routine Steps are Simple
● Prepare the sample with the digestion reagent.
● Insert the tube into the analyzer.
● Press the measurement key.
● Read the result on the display.
Data can be recorded manually or kept in the internal memory for later review. The instrument runs reliably for long periods without drifting, thanks to its stable light source and temperature compensation.
Preparation of Reagent
Take one packet of total phosphorus digestion reagent powder. Dissolve it in pure water and then dilute to 250 mL total volume. Shake the solution well before each use.
Storage Note: Keep the prepared reagent in a refrigerator at 4–8°C, away from light. Do not freeze.
Technical Parameter
|
Model |
TZL-1 |
|
Measuring Range |
0~1.20 mg/L |
|
Resolution |
0.01 mg/L |
|
Repeatability |
1% |
|
Linear Error |
±5% FS |
|
Power Supply |
220V/50HZ |
|
Packaging Size |
405×295×150 mm |
|
Weight |
2KG |
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