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FAQ Category

FAQ

  • Q Did you know we’ve been a source China OEM developer and maker of Turbidity water quality instruments for over 10 years?

    A
    Did you know we’ve been a source China OEM developer and maker of Turbidity water quality instruments for over 10 years?

    Today we’re spotlighting our star product for drinking water safety: the low range turbidity probe for drinking water analyzers!

    What makes it a top choice for drinking water monitoring?

    First, its rock-solid quality stability — every unit goes through 100% full inspection and calibration before leaving our factory, so you never get off-target turbidity data.

    Second, its specialized low-range detection capability, which is critical for meeting the strict turbidity thresholds of drinking water quality assessments.

    With 10+ years of OEM experience, we can also customize this probe to fit your analyzer’s unique needs. If you’re looking for a reliable turbidity probe to protect drinking water safety, this is your go-to option!

  • Q Did you know we’ve been a source China OEM developer and maker of No3 water quality instruments for over 10 years?

    A
    Today we’re highlighting our rock-solid UVNO3 900 Nitrate Water Quality Monitoring Sensor!
     
    What makes it stand out?

    First, unmatched quality reliability — every sensor goes through 100% full inspection and calibration before delivery, so you never have to worry about inaccurate data.

    Second, its core function: it continuously tracks dissolved nitrate concentrations in water, and it’s perfect for two critical tasks: monitoring sewage aeration tanks and controlling denitrification processes (a must for effective water treatment).
    As a professional online water monitoring meter, it’s a game-changer for water treatment teams.

    With 10+ years of OEM experience, we can also customize this sensor to fit your exact needs. If you want a nitrate monitor that’s built to last and calibrated to perfection, this is your pick!

  • Q Did you know we’ve been a source China OEM developer and manufacturer of water quality analysis instruments for over 10 years?

    A Did you know we’ve been a source China OEM developer and manufacturer of water quality analysis instruments for over 10 years?

    Today we’re showcasing our hot-selling star product: the Online RS485 Digital Water Turbidity Immersion Probe!Boasting a precise measurement range of 0.001–4000 NTU, this ultra-reliable tool is built specifically for wastewater monitoring and industrial process water analysis.

    The RS485 digital interface ensures seamless data integration, while our decade-long OEM manufacturing experience guarantees consistent quality and customizable branding options.    Whether you’re an equipment brand looking for OEM partners or a facility in need of turbidity monitoring, this probe (backed by 10+ years of expertise) is your perfect match!


  • Q What is COD? | PROBEST PUVCOD-900 Solves Water Monitoring Hassles

    A
    Hey everyone, welcome to PROBEST Small Water Talk! Today we’re breaking down a key water quality term: COD (Chemical Oxygen Demand).
    So what is COD? Simply put, it’s the amount of oxygen needed to break down organic stuff in water. Common sources include daily sewage, industrial wastewater, and agricultural fertilizers — and COD levels tell us if water quality is up to par.
    But monitoring COD doesn’t have to be a headache! Our PUVCOD-900 Spectroscopy Organic Matter Online Analyzer has all the features you need to make it easy:
    ✅ No sampling & pre-processing：Just drop the probe in water for real-time, continuous monitoring — no extra steps!
    ✅ Auto-cleaning：Less time maintaining, more time getting data.
    ✅ Eco-friendly：No chemical reagents = zero secondary pollution.
    ✅ Wide range (0–2000mg/L)：Xenon lamp cuts through high suspended solids for accurate readings.
    ✅ Turbidity compensation：Say goodbye to measurement errors from murky water.
    ✅ Fast calibration：Solid-state calibrator works without standard liquids — calibrate in minutes!
    Whether you’re monitoring sewage treatment processes, factory discharge, or surface water, this portable analyzer has you covered.
    COD is a big deal for water ecology — don’t sleep on water quality monitoring. Grab the PROBEST PUVCOD-900 for hassle-free, reliable results!

  • Q PROBEST Small Water Talk: What Exactly is Chemical Oxygen Demand (COD)?

    A
    In the water treatment industry, COD is a core indicator — it refers to the amount of oxygen needed to decompose organic substances in water.Where does water COD come from? Primarily human and animal waste, industrial wastewater, agricultural fertilizers, and more. The level of COD directly reflects organic matter concentration, making it a key benchmark for judging whether water quality meets safety standards.
    To help you accurately monitor COD, we bring you the PROBEST PUVCOD-900 Spectroscopy Organic Matter Online Analyzer — a game-changing tool packed with industry-leading advantages:
    1. No sampling required：The probe can be directly immersed for measurement, skipping tedious sampling and pre-processing steps for fast response and 24/7 continuous monitoring. Its built-in auto-cleaning function also cuts down on maintenance hassle.
    2. Eco-friendly design：No chemical reagents are needed during testing, eliminating the risk of secondary pollution to water bodies.
    3. Wide measurement range：Equipped with a high-penetration xenon lamp light source, it works even in high-suspended-matter water, covering a max range of 0–2000mg/L.
    4. Turbidity compensation：Minimizes interference from water turbidity to ensure precise, reliable data.
    5. Fast calibration：Comes with a solid-state calibrator and matching software, enabling quick calibration without standard liquids.
    Portable, efficient, and reliable, the PUVCOD-900 is ideal for scenarios like:
    • Continuous organic matter monitoring during sewage treatment
    • Real-time inlet/outlet water quality tracking at sewage plants
    • Online monitoring of surface water, industrial wastewater, and fishery discharge
    COD is critical for assessing water organic matter levels — protecting water environments and maintaining ecological balance starts with accurate COD monitoring. Choose PROBEST to safeguard water quality!

  • Q When does the warranty period for the PROBEST PDS-300 Transparency Sensor Water Quality Analyzer begin?

    A
    Q： When does the warranty period for the PROBEST PDS-300 Transparency Sensor Water Quality Analyzer begin? 
    How should malfunctions be handled during the warranty period?
     
    A: The warranty period commences from the date of shipment and lasts for no less than one year. During this period, non-human-induced malfunctions are covered by complimentary repair and replacement services. PROBEST maintains dedicated technical support and maintenance teams.

  • Q Can the manufacturer's monthly production capacity of the PROBEST PDS-300 Transparency Sensor Water Quality Analyzer meet large-scale procurement demands? How is delivery for urgent orders guaranteed?

    A As a specialized manufacturer of water quality analysis instruments, PROBEST has a monthly production capacity of 500 units/sets. Routine large-scale purchases can be delivered within the agreed timeframe.

    For urgent orders, the manufacturer can activate emergency production capacity allocation plans to prioritize order fulfillment.

    Expedited orders can be shipped within as little as 7 business days.

  • Q What is the minimum order quantity for the PROBEST PDS-300 Transparency Sensor Water Quality Analyzer? Does it support sample purchases?

    A The standard minimum order quantity is 1 unit/set. Single-unit sample purchases are supported (sample pricing aligns with bulk purchase pricing; subsequent bulk purchases may offset sample price differences). Factory calibration and testing are completed prior to sample shipment.

  • Q How long can the PROBEST PDS-300 Transparency Sensor Water Quality Analyzer sustain continuous underwater monitoring with its IP68 protection rating?

    A The PROBEST PDS-300's IP68 rating is professionally certified. When deployed according to specifications and free from external damage, it enables stable long-term underwater monitoring for 3-5 years. Actual duration may vary slightly based on water conditions. For highly corrosive environments, please contact PROBEST@PROBEST.CN.

  • Q What to Consider When Selecting an Oxygen Demand Analysis Method?

    A

    What to Consider When Selecting an Oxygen Demand Analysis Method?

    • Specific test application scenario
    • Type of oxidant to be used
    • Time required for test completion
    • Measurement accuracy and precision

  • Q Why is COD an Important Water Quality Parameter?

    A
    COD is an important water quality parameter and is used in a wide range of applications, including:

    1. To confirm wastewater discharge and the waste treatment procedure meets criteria set by regulators

    2. To quantify the biodegradable fraction of wastewater effluent – ratio between BOD and COD

    3. COD or BOD measurements are also used as an indicator of the size of a wastewater treatment plant required for a specific location.

  • Q What Processes Require Chemical Oxygen Demand (COD) Monitoring?

    A
     
    -Municipal and industrial wastewater treatment
    -Primary Treatment.
    -Secondary Treatment.
    -Discharge limits.
    -Continuous monitoring of organic matter load in the sewage treatment process.
    -On-line real-time monitoring of influent and outflow water of the wastewater treatment.

  • Q How do these pollutants affect water quality and the environment? Probest's first hand water analyzer monitoring instruments factory

    A
    COD-related pollutants (organic + inorganic) harm water quality and the environment mainly through oxygen depletion, toxicity, and ecological disruption, ultimately affecting aquatic life and human health. Below is the condensed breakdown:

    1. Core Impacts of Organic Pollutants (Main COD Contributors)

    • Oxygen depletion kills aquatic lifeAerobic microorganisms decompose organic matter, consuming large amounts of dissolved oxygen (DO). When DO drops below 2 mg/L, most fish suffocate to death (e.g., wastewater from food processing plants or breweries can trigger large-scale "fish kills" in nearby rivers within days). At 2–5 mg/L DO, aquatic organisms grow slowly, biodiversity declines, and toxic anaerobic bacteria (producing methane or hydrogen sulfide) multiply—making water smelly and uninhabitable.
    • Specific toxicity damages food chains & human health
      • Hydrocarbons (e.g., benzene, oil): Stick to fish gills to block oxygen absorption and cause death; accumulate in aquatic organisms’ fat, and may cause cancer (e.g., benzene links to leukemia) when humans consume contaminated seafood.
      • Phenolic compounds: Kill algae and small invertebrates at concentrations as low as 0.1 mg/L (breaking the food chain base); make drinking water bitter and form toxic byproducts during chlorine disinfection, harming human liver and kidneys.
      • Surfactants (e.g., detergents): Cause bubbles in fish gills to inhibit oxygen exchange; promote harmful algal blooms (releasing toxins like microcystins) by trapping nutrients.
      • Dyes/polymers: Block sunlight, preventing aquatic plants from photosynthesizing (reducing oxygen production) and turning water into a "dead zone."

    2. Secondary Impacts of Inorganic Reducing Substances

    • Sulfides (e.g., hydrogen sulfide): Smell like rotten eggs; react with metals to form black precipitates that clog organisms’ gills; 0.5 mg/L can kill most freshwater fish.
    • Nitrites: Convert to carcinogenic nitrosamines; disrupt oxygen transport in fish blood (causing suffocation even with normal DO levels).
    • Ferrous ions (Fe²⁺): Oxidize into brown precipitates, staining water and destroying habitats for aquatic organisms.

    3. Indirect Impacts

    • Worsens water scarcity: Polluted water cannot be used for irrigation or drinking.
    • Contaminates soil: Toxins accumulate in soil via polluted irrigation water, reducing crop yields and entering the human food chain.
    • Causes economic losses: Billions of dollars are spent annually on COD pollution treatment.

  • Q Online COD BOD TSS Monitoring Sensor PUVCOD Chemical Oxygen Demand COD SensorCOD Sensor ManufacturerCOD BOD TSS Sensor used for Sewage Monitoring COD Sensor for River Water Monitoring Online COD Sensor Installed for Wastewater Quality Monitoring Online COD Sensor-PROBEST

    A

    What is COD, BOD, and TSS?

     

    COD, BOD, and TSS are core parameters in environmental science and wastewater treatment, widely used to assess water quality and pollution levels.

    COD: Chemical Oxygen Demand

     

    COD quantifies the amount of oxygen required to chemically oxidize both organic and inorganic substances in water. As a direct indicator of total pollution load (with a focus on organic pollutants), it is commonly used to evaluate water quality in industrial effluents and municipal wastewater. Its key advantage lies in rapid measurement, making it ideal for high-throughput monitoring of pollution levels.

    BOD: Biochemical Oxygen Demand

     

    BOD refers to the dissolved oxygen used by aerobic microorganisms to decompose organic matter in water. It specifically reflects the level of biodegradable organic pollution and the oxygen demand for aerobic biological processes to break down these pollutants. As a critical metric, it is used to assess the effectiveness of biological wastewater treatment systems and gauge the health of aquatic ecosystems (e.g., avoiding oxygen depletion in rivers or lakes).

    TSS: Total Suspended Solids

     

    TSS represents the concentration of suspended solid particles in water—encompassing both organic (e.g., organic debris, microbes) and inorganic (e.g., silt, sediment) materials that do not dissolve. It is essential for evaluating water clarity, sedimentation potential, and overall water quality. Practically, it is used to verify the performance of sediment control measures (e.g., in construction sites) and the solid-removal efficiency of wastewater treatment processes.

  • Q Do PROBEST water quality sensors require regular calibration? What is the calibration cycle?

    A
    Yes, PROBEST water quality sensors require regular calibration. The calibration cycle varies by sensor type. It is generally recommended to calibrate every two weeks or based on usage frequency to ensure data accuracy.

  • Q What is the waterproof rating of PROBEST's online water quality monitoring sensors? Can they be used underwater for extended periods?

    A
    Answer: All genuine, high-quality PROBEST online digital water quality monitoring sensors meet the IP68 waterproof standard.
    They are designed for long-term underwater operation and can function reliably at depths up to 10 meters.

  • Q What signal output methods are available for PROBEST water quality analysis sensors? Can they be quickly integrated with existing monitoring platforms?

    A
    All PROBEST water monitoring analysis sensors are with the RS485 (MODBUS-RTU) signal output.
    This industry-standard, stable transmission protocol offers strong compatibility and enables seamless integration with various monitoring systems such as SCADA systems and smart water management platforms.
    No additional conversion modules are required; simply connect according to the standard wiring sequence to achieve real-time data upload.

  • Q What is the detection principle of online PROBEST cyanobacteria sensors?

    A
    Answer: By utilizing the fluorescence excitation properties of phycocyanin in cyanobacteria, a specific wavelength light beam excites the phycocyanin.
    The intensity of the emitted fluorescence is then measured to accurately calculate the cyanobacteria concentration.

  • Q Does water filtered through a water purifier still require regular testing?

    A
    Yes. Water purifier filter cartridges have a limited lifespan. Failure to replace them over time can lead to reduced filtration effectiveness and even bacterial growth. It is recommended to test the output water quality every 6-12 months to determine if the filter cartridge needs replacement.

  • Q Does tap water with an unusual odor (such as a chlorine smell or fishy odor) require water quality analysis?

    A
    Chlorine odor: This is typically residual chlorine from disinfection at the water treatment plant, which is normal. Boiling the water will eliminate the odor, and testing is generally unnecessary.

    Fishy or earthy odor: This may indicate aging pipes, contamination in secondary water supply tanks, or the proliferation of algae and microorganisms in the water. Testing for microbial and organic indicators is recommended.

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