
Electra Mining Africa
2026/9/7 - 2026/9/11
Johannesburg
Johannesburg Expo Centre (Nasrec)






+86 15201939701
linxin@panbu.com
Our measurement engineers will reply with model recommendations, stock status, and quotes within 1 business days.

2026/9/7 - 2026/9/11
Johannesburg
Johannesburg Expo Centre (Nasrec)

2026/9/8 - 2026/9/10
Lusaka
Abidjan Exhibition Park

2026/9/14 - 2026/9/17
Bangkok
Bitec Exhibition Hall EH101 Booth
Sustainability is a core practice in modern manufacturing. Our service center uses energy-efficient calibration stations, recyclable packaging, and paperless calibration records to ensure every instrument delivered has a smaller environmental footprint throughout its entire lifecycle.
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Discover why factories and equipment manufacturers across industries choose Linxin for genuine JUMO measurement technology.
Selection criteria, media compatibility, and operating condition analysis. Compiled by the measurement engineer; valid indefinitely.

Based on real-world conditions for drinking water, circulating cooling water, and wastewater, here are the calibration intervals, cleaning methods, and failure indicators for pH, conductivity, and dissolved oxygen sensors: ### 1. pH Sensors * **Calibration Interval** * **Drinking Water:** Weekly to bi-weekly (high stability). * **Circulating Cooling Water:** Daily to weekly (subject to scaling and biological growth). * **Wastewater:** Daily or per batch (high variability and fouling risk). * **Cleaning Method** * **General:** Rinse with deionized water. * **Scale/Oil (Cooling/Wastewater):** Soak in mild acid (e.g., 0.1M HCl) for scale; use enzymatic detergent or mild surfactant for organic/oil films. Avoid abrasive scrubbing. * **Protein/Biofilm (Wastewater):** Soak in pepsin/HCl solution or specialized bio-cleaning agent. * **Failure Indicators** * Calibration fails repeatedly (>3 attempts) or slope/offset drifts beyond ±5%. * Response time exceeds 60 seconds. * "Slope" value <90% or >105% of theoretical Nernstian response. * Drift in stable buffer solutions. ### 2. Conductivity (EC) Sensors * **Calibration Interval** * **Drinking Water:** Monthly. * **Circulating Cooling Water:** Weekly (due to concentration cycles and additives). * **Wastewater:** Bi-weekly or as needed (high particulate load). * **Cleaning Method** * **General:** Rinse with deionized water. * **Fouling/Scaling:** Ultrasonic bath or soak in mild acid/detergent. For severe scaling, use a soft brush gently. * **Organic Buildup:** Use alcohol or specific organic solvent cleaners. * **Failure Indicators** * Cell constant deviates significantly from factory settings. * Reading does not stabilize or fluctuates wildly without flow changes. * Electrode impedance is too high (indicates coating). * Physical damage to the cell plates or gasket leakage. ### 3. Dissolved Oxygen (DO) Sensors * **Calibration Interval** * **Drinking Water:** Weekly (air saturation check). * **Circulating Cooling Water:** Daily to weekly (temperature fluctuations and biological activity). * **Wastewater:** Daily (critical for process control). * **Cleaning Method** * **Membrane:** Replace membrane cap every 1–4 weeks depending on fouling. Clean electrode tip with soft cloth/water. * **Electrode Tip:** Gently wipe with lint-free cloth soaked in water or mild detergent if coated. * **Severe Fouling:** Soak in dilute bleach (for organics) followed by thorough rinsing (check manufacturer guidelines first). * **Failure Indicators** * Long stabilization time (>2 minutes in stirred air-saturated water). * Zero point cannot be reached in nitrogen-purged solution. * Slope error >5% during two-point calibration. * Current signal drops below expected range despite adequate oxygen levels. * Membrane appears torn, yellowed, or clogged.
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Compare the application boundaries of platinum resistance thermometers and thermocouples across four dimensions: response speed, maximum temperature limit, vibration resistance, and signal transmission distance. Additionally, list selection verification criteria for hygienic, explosion-proof, outdoor, and high-vibration measurement points.
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Starting with temperature, pressure, and water quality analysis, we break down the selection logic differences between HVAC and hydrogen production industries regarding media compatibility, impact resistance, explosion-proof certification, and high-purity monitoring.
Read full articleCommon questions about authorization, product scope, selection support, calibration after-sales service, and online payment are answered directly here.
JUMO is a German manufacturer of industrial instruments for measuring temperature, pressure, flow, level, and water quality. Its products serve HVAC, food & beverage, chemical & pharmaceutical, energy & power, and water treatment industries. In Chinese, it is commonly referred to as "JUMO" or "German JUMO," both denoting the same German measurement technology company.
The brands "JUMO 久茂", "久茂 JUMO", and "德国久茂" all refer to Germany's JUMO. Linxin Technology (Shanghai Linxin Information Technology Co., Ltd.) holds an Authorized Dealer Certificate issued by JUMO China, with authorization number JAD_AC_2025064. You can view the scope of authorization and download the original PDF from the Authorization section on the homepage or the About Us page.
Yes. Linxin Technology Co., Ltd. is an authorized distributor of JUMO from Germany. All sensors and instruments supplied are sourced directly from the original manufacturer. The authorization letter can be viewed and downloaded as a PDF on the homepage's authorization section or the "About Us" page.
Authorization No. JAD_AC_2025064, issued by JUMO China to Shanghai Linxin Information Technology Co., Ltd., valid from 2025/10/1 through 2027/9/30. Authorized scope: sales of JUMO products in the electrical drive industry within China's East China region, including provision of technical support and after-sales service to customers.
Yes. The homepage authorization section and the "About Us" page both provide access to view and download the authorization PDF, which includes the authorization number, issuing party, authorized party, and validity period. This document can be used directly for supplier onboarding reviews, bidding documentation, and quality system archiving.
Covers temperature sensors and switches, dial thermometers and electrical contact thermometers, pressure and differential pressure transmitters, variTRON automation systems, and water quality analysis sensors for conductivity, pH/ORP, dissolved oxygen, turbidity, and more. Each product is labeled with a datasheet number and complete technical specifications.
JUMO temperature sensors are categorized into four groups on this site: resistance and thermocouple temperature sensors, temperature switches, dial and electrical contact thermometers, and associated process connections and protective sheaths. Filter by measurement range, sensing element, protection rating, and certifications, then add items to compare for full technical specifications.
As an authorized JUMO distributor in Germany, every sensor comes with official authorization documents. Serial numbers are traceable to the original manufacturer, the entire supply chain is documented, and we can support your quality audits.
Yes. The product page supports filtering by measurement range, sensing element, protection class, and certifications, with a comparison feature to view parameter differences. If the datasheet is insufficient for decision-making, submit an inquiry and our engineers will provide model recommendations based on your operating conditions.
Every inquiry will be answered within 1 business days, including model recommendations, lead times and quotes, or clarification on any technical questions.
In addition to supply, Linxin Technology provides instrument calibration, on-site commissioning, and after-sales technical support. Services can be scheduled during business days.
Supported. Service-related payments, including calibration services, on-site debugging, technical support, and spare parts, can be paid online via the "Service Payment" page. We offer Alipay website payment and WeChat Scan-to-Pay options.
Required. Please log in with a mobile phone SMS verification code before payment. The code will automatically complete registration and login, allowing you to check your order payment status after logging in.
You can reach us by phone at +86 15201939701, email at linxin@panbu.com, or visit our office at Building C, No. 888 Huanhu West 2nd Road, Shanghai Free Trade Zone. Our business hours are Monday to Friday from 9:00 to 18:00 (GMT+8).
JUMO Authorized Distributor
Authentic products with traceable supply chain.
Measurable Parameter Categories
From Temperature to Water Quality Analysis
Number of service industry entities
From HVAC to hydrogen production
RFQ Response Time
Respond within 1 business days