如何在电磁式、涡街、热式质量与差压流量计之间做选择——以及我们的哪款型号契合您的介质、量程与精度。
第一个问题永远是：您在测量什么，又需要从测量中获得什么？
| 技术 | 适用场景 | 主要限制 | 型号 |
|---|---|---|---|
| Electromagnetic | Conductive liquids (≥1–5 uS/cm), water & wastewater, slurries, clean water | Cannot measure gases, steam, or non-conductive liquids | SE11E · SE10A · SE11H · SE13E · SEB600S |
| Vortex | Steam, gas, and liquid — one meter for all three; low maintenance | Accuracy affected by vibration; needs reasonable flow velocity | SV21 · SV23 · SVH |
| Thermal mass | Direct gas mass flow — no separate temperature/pressure compensation | Gas applications only; not for liquids | ST51 · ST54 |
| Differential pressure | Budget large-pipe measurement, high-temp/high-pressure, dirty or viscous media | Lower accuracy, higher permanent pressure loss (except SD41/SD42) | SD40 · SD41 · SD42 · SD43 · SD45 |
| Variable area (rotameter) | Simple, cost-effective local indication of liquid/gas/steam flow | Manual reading; needs transparent line or indicator | SR41 |
确定技术路线后，剩下的决策就是管径、精度等级与工艺条件。
| 型号 | 技术 | 管径范围 | 精度 | 流体温度 |
|---|---|---|---|---|
| SE11E | Electromagnetic | DN3–2000 | ±0.2 / ±0.3 / ±0.5% | -25~200°C |
| SE10A | Electromagnetic (24V DC) | DN10–300 | ±0.5% | -25~180°C |
| SE11H | Electromagnetic (slurry) | DN3–2000 | ±0.2 / ±0.3 / ±0.5% | -25~200°C |
| SE13E | Electromagnetic (sanitary) | clamp connection | ±0.5% | food/pharma grade |
| SEB600S | Electromagnetic (battery) | DN15–300 | ±0.5% | no power line needed |
| SV21 | Vortex | DN15–300 | liq ±0.75% · gas ±1.0% | -40~350°C |
| SV23 | Vortex (sanitary) | clamp connection | liq ±1.0% · gas ±1.5% | food/pharma/steam |
| SVH | Vortex (digital) | DN15–300 | liq ±0.75% · gas ±1.0% | -40~260°C |
| ST51 | Thermal mass | flange/thread/insert | ±1.0% (gas mass) | up to 100:1 turndown |
| SD41 | Balanced (DP) | DN25–1000 | liq ±0.5% · gas ±1.0% | 0.5D–2D straight run |
| SR41 | Variable area | DN15–150 | 1.5 / 2.5 class | -40~250°C |
告诉我们介质、温度、压力、管径与所需精度——我们将推荐型号并在 24 小时内报价。
From benchtop spectrophotometers to portable multi-parameter meters and online monitors. Match lab needs, field needs, and budget to the right analyzer family.
Read Guide →阅读指南 →Baca Panduan →Đọc Hướng dẫn →อ่านคู่มือ →Baca Panduan →Basahin ang Gabay →Industrial syringe pumps, vertical syringe pumps, plunger pumps, and peristaltic pumps — precision, pressure, capacity, and longevity compared side by side.
Read Guide →阅读指南 →Baca Panduan →Đọc Hướng dẫn →อ่านคู่มือ →Baca Panduan →Basahin ang Gabay →pH, ORP, dissolved oxygen, conductivity electrodes and online fluorescence sensors for water analysis. Matching electrode chemistry to your application.
Read Guide →阅读指南 →Baca Panduan →Đọc Hướng dẫn →อ่านคู่มือ →Baca Panduan →Basahin ang Gabay →Vietnam discharge limit A/B/C by flow rate — size and choose the right online COD monitor.按流量分档的越南 A/B/C 排放限值——据此选对在线 COD 监测仪。Batas pembuangan Vietnam A/B/C menurut laju alir — pilih monitor COD online yang tepat.Giới hạn xả thải A/B/C của Việt Nam theo lưu lượng — chọn đúng máy đo COD trực tuyến.ค่าปล่อย A/B/C ของเวียดนามตามอัตราการไหล — เลือกเครื่องวัด COD ออนไลน์ให้ถูกต้องHad pelepasan Vietnam A/B/C mengikut kadar alir — pilih monitor COD dalam talian yang betul.Limitasyon sa paglabas ng Vietnam A/B/C ayon sa daloy — piliin ang tamang online COD monitor.
Read the full guide →阅读完整指南 →Baca panduan lengkap →Đọc hướng dẫn đầy đủ →อ่านคู่มือเต็ม →Baca panduan penuh →Basahin ang buong gabay →Total Nitrogen cap under QCVN 40:2025 — match the method to your ammonia and organic load.QCVN 40:2025 的总氮上限——按氨氮与有机负荷匹配监测方法。Batas Total Nitrogen QCVN 40:2025 — sesuaikan metode dengan beban amonia dan organik Anda.Trần Total Nitrogen theo QCVN 40:2025 — chọn phương pháp phù hợp tải lượng amoni và hữu cơ.เพดานไนโตรเจนรวมตาม QCVN 40:2025 — เลือกวิธีให้เหมาะกับแอมโมเนียและภาระอินทรีย์Had Total Nitrogen QCVN 40:2025 — padankan kaedah dengan beban ammonia dan organik anda.Takda ng Total Nitrogen sa QCVN 40:2025 — itugma ang metoda sa amonia at organic load.
Read the full guide →阅读完整指南 →Baca panduan lengkap →Đọc hướng dẫn đầy đủ →อ่านคู่มือเต็ม →Baca panduan penuh →Basahin ang buong gabay →pH discharge band and how electrode and online pH transmitters keep you inside it.pH 排放区间，以及电极与在线 pH 变送器如何稳定保持在区间内。Rentang pH pembuangan dan bagaimana elektroda serta transmitter pH online menjaganya tetap terjaga.Dải pH xả thải và cách điện cực, bộ truyền pH trực tuyến giữ giá trị luôn trong dải.ช่วง pH ที่อนุญาต และขั้วไฟฟ้ากับตัวส่งสัญญาณ pH ออนไลน์ช่วยให้ค่าอยู่ในช่วงJulat pH pelepasan dan bagaimana elektrod serta pemancar pH dalam talian mengekalkannya.pH discharge band at kung paano pinapanatili ng electrode at online pH transmitter ang pagiging sumusunod.
Read the full guide →阅读完整指南 →Baca panduan lengkap →Đọc hướng dẫn đầy đủ →อ่านคู่มือเต็ม →Baca panduan penuh →Basahin ang buong gabay →Total Suspended Solids limit by flow class — pick gravimetric or optical TSS monitoring.按流量档位的 TSS 限值——选重量法还是光学法 TSS 监测。Batas TSS menurut kelas aliran — pilih pemantauan TSS gravimetri atau optik.Giới hạn TSS theo cấp lưu lượng — chọn giám sát TSS trọng lượng hay quang học.ขีดจำกัด TSS ตามระดับการไหล — เลือกเฝ้าวัด TSS แบบ gravimetric หรือแบบ opticalHad TSS mengikut kelas aliran — pilih pemantauan TSS gravimetri atau optik.Limitasyon ng TSS ayon sa klase ng daloy — piliin ang gravimetric o optical na pagsubaybay.
Read the full guide →阅读完整指南 →Baca panduan lengkap →Đọc hướng dẫn đầy đủ →อ่านคู่มือเต็ม →Baca panduan penuh →Basahin ang buong gabay →电磁流量计可测量水、污水、浆液等导电液体，无活动部件，下限流量很低也能工作。涡街流量计适用于蒸汽、气体及清洁液体或蒸汽，并能承受更高温度与压力。导电液体选电磁，气体/蒸汽或需要更宽流体范围时选涡街。
需要。上游宜预留约 5 倍管径（5×DN）、下游约 2 倍管径（2×DN）的直管段以稳定流态；空间紧张时可用流整器。涡街流量计同样需要直管段（上游约 10–20×DN），才能准确测量旋涡频率。
能。由于无阻碍部件，电磁流量计可很好地处理脏水、污泥和浆液。唯一要求是液体导电（电导率高于约 5 µS/cm）且衬里与流体兼容。