高精密BRONKHORST流量感測器 - BFS

科里奧利流量感測器 – 感測器中的勞斯萊斯

高精度流量監測和控制

特點

Elveflow與Bronkhorst合作專門開發了一款適用於微流體的獨特科里奧利流量感測器（Bronkhorst Coriolis Flow Sensor，BFS）。 它提供了各種益處：精度高，範圍廣泛，相容於各種液體與氣體（無需針對每種測量做校準，可直接測量）。 此外，

• 寬廣的流量範圍: 1.6 μL/min到3.3 mL/min
• 高精度
• 直接的質量流量測量，與流體性質無關
• 非侵入性的測量
• 額外的密度和溫度輸出
• 雙向測量
• 響應速度快（響應時間35 ms）

流速控制

通過將科里奧利流量感測器與Elveflow的壓力和真空微流體流量控制器（OB1 MK3+，Cobalt）相結合，實現實驗的流量控制。 Elveflow 的ESI軟體會自動調整壓力以達到所需的流量。研究人員如果想從他們的第三方流體驅動器中監測流速，可以將流量感測器直接接入電腦上。

工作原理

• 具有成本效益的解決方案：一個感測器的工作範圍涵蓋了幾個標準微流體感測器的範圍。
• 無須校正。
• 獨立的傳感器：將感測器直接接在電腦上測量流速。
• 卓越的流量測量的重複性&長期穩定性。
• 優異的精度：高達0.2%的精確度。
• 易於安裝（氣泡夾雜物風險低）

科里奧利流量感測器是如何工作的？

一個微流體科里奧利流量感測器包含一個不斷振動的U形管。當流體流過振動管時，產生科里奧利力，使管彎曲或扭曲。 通過最佳定位的感測器檢測檢測極小的管位移並進行電學估算。 由於感測器信號的測量相移與質量流量成正比，科里奧利流量感測器可以直接測量質量流量。這種測量原理非常準確、快速，更重要的是，它與流體的特性（密度、溫度、黏度、壓力、熱容量或電導率）無關。

您應該選擇哪種流量感測器？

Elveflow提供兩種類型的流量傳感器：一種是基於熱傳導技術的（微流體流量感測器），一種是基於科里奧利原理的（BRONKHORST流量感測器）。這兩種感測器都有優點和缺點，已經在下表中進行了總結。該表有助於您根據您的應用和預算來選擇感測器。

更多的應用資訊，請參考連結：https://www.elveflow.com/microfluidic-products/microfluidics-flow-measurement-sensors/microfluidic-flow-sensor-coriolis/#tab-applications

Elveflow提供不同等級的科科里奧利流量感測器，這些感測器因其工作流速範圍而不同。下表總結了不同傳感器的主要特點。

PREMIUM CORIOLIS FLOW SENSOR - the rolls-royce of flow sensors

HIGHLIGHTS

Specifically designed to suit microfluidic requirements, this flow rate sensor is based on the Coriolis principle. Its features make it the best and smartest solution for microfluidics applications:

• Extremely wide flow rate range
• High accuracy
• Direct mass flow measurement, independent of fluid properties
• Non-invasive measurement
• Additional density and temperature outputs
• Bi-directional measurement
• Fast response

FLOW RATE CONTROL:
You can achieve flow control of your experiment by combining the Coriolis Flow Sensor with our pressure controller systems (OB1 MK3+, AF1). The Elveflow ESI software automatically adjusts the pressure to reach the required flow rate.
Researchers who want to monitor the flow rate from their third party fluid driver can plug the flow sensor directly onto the computer.

• Cost-effective solution: one sensor’s operating range covers the ranges of several standard microfluidic sensors.
• No calibration required
• Stand alone sensor: plug the sensor directly to your computer to measure the flow rate.
• Excellent repeatability and long-term stability
• Excellent accuracy: down to 0.2 % of measured value accuracy
• Easy to install and use
• Low risk of gas bubble inclusion

How does a Coriolis flow meter work?
A microfluidic Coriolis flow sensor contains a U-shaped loop which constantly vibrates. When a fluid flows through this vibrating loop, Coriolis forces are generated and bend or twist the tube. The extremely small tube displacements are detected by sensors and fed to the electronic board. Since the measured phase shift is proportional to the mass flow, the Coriolis flow rate sensor measures the mass flow directly. This measurement principle is very accurate, fast and, more importantly, independent of the properties of the fluid (density, temperature, viscosity, pressure, heat-capacity or conductivity).

WHICH Flow Rate Sensor SHOULD YOU CHOOSE?
Elveflow offers two types of flow rate sensors: one based on thermal conductivity technology (Microfluidic Flow Sensor) and one based on Coriolis principles (Bronkhorst Flow Sensor). Both sensors have pros and cons that we have summarized in the table below. This table helps you choose your sensors depending on your application and your budget.

Ｍore application information, please refer to the link: https://www.elveflow.com/microfluidic-products/microfluidics-flow-measurement-sensors/microfluidic-flow-sensor-coriolis/#tab-applications

Elveflow offers different Premium Coriolis Flow Rate Sensors, which vary by their operating flow rate range. The following table sums up the main features of the different sensors: