Understanding the Calibration Range of DP Flow Transmitter

Calibration is a critical aspect of ensuring the accuracy and reliability of any measuring instrument, including differential pressure (DP) flow transmitters. These devices are commonly used in industrial processes to measure the flow rate of liquids and gases. Understanding the calibration range of a DP flow transmitter is essential for ensuring that it operates within its specified limits and provides accurate measurements.

The calibration range of a DP flow transmitter refers to the range of flow rates over which the device has been calibrated to provide accurate measurements. This range is typically specified by the manufacturer and is based on the design and performance characteristics of the transmitter. It is important to note that operating the transmitter outside of its calibration range can result in inaccurate measurements and potentially lead to process inefficiencies or safety hazards.

When selecting a DP flow transmitter for a specific application, it is crucial to consider the calibration range of the device and ensure that it aligns with the expected flow rates in the process. Choosing a transmitter with a calibration range that is too narrow may result in inaccurate measurements at higher flow rates, while selecting one with a calibration range that is too wide may compromise the accuracy of measurements at lower flow rates.

Model No. CIT-8800 Inductive Conductivity / Concentration Online Controller
Measurement range Conductivity 0.00μS/cm ~ 2000mS/cm
Concentration 1.NaOH,(0-15)% or(25-50)%;
2.HNO3(note the Corrosion resistance of the sensor)(0-25)% or(36-82)%;
3.User-defined concentration curves.
TDS 0.00ppm~1000ppt
Temp. (0.0 ~ 120.0)℃
Resolution Conductivity 0.01μS/cm
Concentration 0.01%
TDS 0.01ppm
Temp. 0.1℃
Accuracy Conductivity 0μS/cm ~1000μS/cm ±10μS/cm
1 mS/cm~500 mS/cm ±1.0%
500mS/cm~2000 mS/cm ±1.0%
TDS 1.5 level
Temp. ±0.5℃
Temp. compensation element Pt1000
range (0.0~120.0)℃ linear compensation
(4~20)mA Current output channels Double channels
features Isolated, adjustable, reversible, 4-20MA output, instruments/ transmitter mode.
Loop resistance 400Ω(Max),DC 24V
Resolution ±0.1mA
Control contact Channels Triple channels
Contact Photoelectric relay output
Programmable Programmable ( temperature 、conductivity/concentration/TDS、timing)output
Features Could set temperature、conductivity/concentration/TDS、 timing NO/NC/ PID selection
Resistance load 50mA(Max),AC/DC 30V(Max)
Data communication RS485,MODBUS protocol
Power supply DC 24V±4V
Consumption <5.5W
Working environment Temperature:(0~50)℃ Relative Humidity:≤85%RH(non- condensing )
Storage Temperature:(-20~60)℃ Relative Humidity:≤85%RH(non- condensing)
Protection level IP65(with rear cover)
Outline dimension 96mm×96 mm×94mm (H×W×D)
Hole dimension 91mm×91mm(H×W)
Installation Panel mounted , fast installation

To ensure that a DP flow transmitter operates within its calibration range, regular calibration checks and adjustments may be necessary. This can be done using a calibration standard or reference device to compare the measurements of the transmitter against known values. If any discrepancies are found, adjustments can be made to bring the transmitter back into calibration.


It is also important to consider the effects of temperature and pressure on the calibration range of a DP flow transmitter. Changes in temperature can affect the performance of the transmitter and may require adjustments to maintain accuracy. Similarly, variations in pressure can impact the calibration range of the device, especially in applications where the flow rates are subject to fluctuations.

In some cases, it may be necessary to recalibrate a DP flow transmitter to account for changes in operating conditions or to verify its performance over time. This can be done by a qualified technician using specialized equipment and procedures to ensure that the transmitter meets the required accuracy standards.

Model EC-510 Intelligent conductivity meter
Range 0-200/2000/4000/10000uS/cm
Accuracy 1.5%(FS)
Temp. Comp. Automatic temperature compensation
Oper. Temp. Normal 0~50℃; High temp 0~120℃
Sensor C=0.01/0.02/0.1/1.0/10.0cm-1
Display LCD Screen
Communication 4-20mA output/2-10V/1-5V/RS485
Output High/Low limit dual relay control
Power AC 220V±10% 50/60Hz or AC 110V±10% 50/60Hz or DC24V/0.5A
Working Environment Ambient temperature:0~50℃
Relative humidity≤85%
Dimensions 48×96×100mm(H×W×L)
Hole Size 45×92mm(H×W)
Installation Mode Embedded

In conclusion, understanding the calibration range of a DP flow transmitter is essential for ensuring accurate and reliable measurements in industrial processes. By selecting a transmitter with a suitable calibration range, monitoring its performance, and conducting regular calibration checks, operators can maintain the accuracy of flow measurements and optimize process efficiency. Calibration is a critical aspect of maintaining the performance of DP flow transmitters and should be given due consideration in any industrial application.

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