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Q What are the sample water requirements for the Probest CL-201 residual chlorine or total chlorine analysis?
A Probest CL-201 residual chlorine or total chlorine analysis requires of the sample water situation as following:
Flow rate: 200–400 mL/min
Inlet pressure: 0.1–5 bar
Temperature: 5–40 °C
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Q What power supply does CL-201 residual chlorine or total chlorine analysis support?
A Probest CL-201 residual chlorine or total chlorine analysis supports dual power supply: AC220V ±10% or DC24V.
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Q Does residual chlorine or total chlorine analysis have reagent low alarm?
A Yes. The PROBEST CL-201 residual chlorine or total chlorine analysis includes a reagent shortage alarm to remind users to replace reagents in advance.
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Q Does Probest CL-201 residual chlorine or total chlorine analysis support data recording and export?
A Does Probest CL-201 residual chlorine or total chlorine analysis support data recording and export?
Yes. residual chlorine or total chlorine analysis CL-201 supports data storage and SD card data export for audit and compliance.
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Q Does CL-201 Probest CL-201 residual chlorine or total chlorine analysis require frequent cleaning?
A Does Probest CL-201 residual chlorine or total chlorine analysis require frequent cleaning?
No. It has a built in automatic cleaning function to minimize manual maintenance.
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Q How long can the residual chlorine or total chlorine reagent last?
A PROBEST CL201 residual chlorine or total chlorine monitoring analysis's reagent lasing time:
The reagent supports 30 days of continuous operation without replacement, greatly reducing maintenance cost. (Base on recycle)
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Q What is the accuracy of PROBEST CL201?
A PROBEST CL201 residual chlorine or total chlorine monitoring analysis:
0–5 mg/L: ±5% of reading or ±0.03 mg/L Cl₂ (whichever is greater)
5–10 / 20 mg/L: ±10%
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Q What is the measurement range of PROBEST CL201?
A PROBEST Residual Chlorine or Free Chlorine Analyzer range:
Residual chlorine: 0–10 mg/L
Total chlorine: 0–10 mg/L or 0–20 mg/L
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Q What measurement method does CL201 use?
A PROBEST residual chlorine or total chlorine water quality monitor uses the DPD standard colorimetric method, the most widely accepted and accurate method for online chlorine measurement.
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Q What is the CL201 residual chlorine or total chlorine analyzer used for?
A The CL-201 is an online colorimetric analyzer used to measure residual chlorine or total chlorine in drinking water, tap water networks, circulating cooling water, and wastewater disinfection systems.
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Q Does TN measured by PROBEST PCM200-TP include both NH₄–N and NO₃–N?
A Yes. Total nitrogen (TN) includes organic nitrogen, NH₄–N, NO₂–N, and NO₃–N, so it is always greater than or equal to the sum of NH₄–N and NO₃–N.
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Q What are the mainstream methods supported by PROBEST for nitrogen analysis?
A -
PROBEST supports:
ISE method (PINH3-900, PISE-NO3)
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- UV spectrophotometry (PUVNO3-900)
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- Total nitrogen digestion/oxidation methods (PCM200-TP) Continuous flow / segmented flow analysis (CFA/SFA)
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Q Under what conditions can PCM200-TN TN approximately equal NH₄–N + NO₃–N?
A When organic nitrogen and nitrite nitrogen (NO₂–N) are very low and negligible, TN ≈ NH₄–N + NO₃–N. This can be verified using PROBEST PINH3-900, PISE-NO3 or PUVNO3-900, and PCM200-TP.
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Q What is the difference between PROBEST PISE-NO3 and PUVNO3-900?
A - PROBEST PISE-NO3: Ion-Selective Electrode (ISE) method for fast field testing
- PROBEST PUVNO3-900: UV spectrophotometric method for laboratory-grade NO₃–N analysis
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Q Can I use PROBEST ISE electrodes for on-site rapid testing?
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Q What principle does the PROBEST PUVNO3-900 use to measure NO₃–N?
A The PROBEST PUVNO3-900 uses the ultraviolet (UV) spectrophotometric method to determine nitrate nitrogen (NO₃–N).
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Q What are the available nitrate nitrogen (NO₃–N) measurement methods in PROBEST instruments?
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PROBEST offers two NO₃–N measurement technologies:
ISE method using PISE-NO3
- UV spectrophotometric method using PUVNO3-900
The PISE-900 sensor can flexibly select one or two ion-selective electrodes. At the same time, it is equipped with PH and temperature electrodes as standard, so that 4 parameters can be monitored simultaneously. The optional parameters of ion selective electrode include: Ammonia nitrogen (NH4+), Nitrate (NO3-), Potassium ion (K+), Chloride (CL-), Fluoride (F-). Different parameter combinations can also achieve mutual compensation, making the measurement data more accurate.
PROBEST NO3 absorbs at 210 nm UV light. When the Spectrometer Nitrate probe is working, the water sample flows through the slit. When the light from the light source in the probe passes through the slit, part of the light is absorbed by the sample flowing in the slit, and the other light passes through the sample and reaches the other side of the probe. Calculate the concentration of nitrate.
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Q Which PROBEST model is designed for total nitrogen (TN) analysis?
A PCM200-TP is the PROBEST model used for total nitrogen (TN) continous measurement in water samples.
The principle of ammonium molybdate spectrophotometry is to digest the sample with potassium
persulfate and convert all the phosphorus contained into orthophosphate. In an acidic medium,
orthophosphate reacts with ammonium molybdate to form phosphomolybdate heteropoly acid in the
presence of antimony salt, which is immediately reduced by ascorbic acid to produce a blue complex
whose absorbance is proportional to the concentration of total phosphorus.
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Q What measurement principle does the PROBEST PINH3-900 use?
A The PINH3-900 uses an Ion-Selective Electrode (ISE) for rapid, direct measurement of ammonium nitrogen (NH₄–N).
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Q What nitrogen parameters can PROBEST instruments measure?
A PROBEST provides solutions for Ammonium Nitrogen (NH₄–N), Nitrate Nitrogen (NO₃–N), and Total Nitrogen (TN) using models including PINH3-900, PISE-NO3, PUVNO3-900, and PCM200-TP.
