Analog vs Digital Sensor Technology

Benefits of Memosens-Based Sensors

Understand the differences between both technologies and the advantages of digital sensors

Different pH Measuring Principles


Analog

Typical Sensor Raw Signals: mV, nA, Ω

The ‘raw’ signal from an analytical sensor is seldom useful, as it must be converted into a readable measured value. The signal is converted in the transmitter through calculation algorithms, which also consider sensor adjustments.

Digital

Converts Measured Values into a Digital Signal

Sensor signals are digitally converted by a processor in the sensor head. Measured values and sensor information are digitally stored in the processor’s memory.

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Analog pH Sensors: Risk of Measurement Inconsistency

Analog technology can cause a lot of complications. If the cable is affected by corrosion or humidity, or if the signal is not stable (e.g. vibration causes the cable to rattle) the measurement may be inaccurate and inconsistent. 

Possible Problems Caused by Analog:

  • Transmitter:Use of different compensation algorithms, temperature compensation, sensor user-handling, incorrect buffer management.
  • Cable: environmental effects (galvanic isolation, static electricity build-up), or even just bad electrical grounding
  • Sensor: Signal drop due to cable resistance, contact resistance, remaining moisture, oxidation, dirt

Memobase Plus

Is calibration quality control critical to your business? Memobase Plus is the solution. The leader in pH quality control software allows you to:

  • Measure field samples for manual quality check and record results directly to your desired database
  • Run customized calibrations on all your pH sensors and record critical data electronically, automatically and fully. Record more critical data than you ever would manually and totally eliminate error caused by improper data collection. Memobase Plus tracks all key data and saves it to your desired database. Ensure consist calibrations with selected SOPs (Standard Operating Procedures) regardless of who is doing the calibration.
  • Control your data, eliminate tampering and store every sample or calibration automatically into a secure passcode protected database. Always have easy access and protected records to ensure quality control and regulatory compliance.

Memosens Plus is an essential tool for anyone looking to do it right!

Ensure the Highest Reliability with Digital Sensor Technology

The features of digital sensor technology increase the effectiveness of your processes making them more cost-efficient and reliable. Digital sensors provide a longer lifetime, which saves you money in the long run. If you perform the cleaning in the lab, you can adjust the sensor to achieve better accuracy. When you do this, its lifespan is prolonged. You will also have the chance to save time and costs during the maintenance process. In fact, with analog sensors you usually have a higher risk of encountering various errors in measurement – therefore you spend more time troubleshooting.

  • The measuring unit is the same, but as you take away a lot of the errors due to signal integrity, the likelihood of measuring an accurate value increases.
  • Thanks to the inbuilt memory, each sensor has an identity. Knowing how many hours each of them has been operating, including which temperature it’s been exposed and for how long, will help you understand the process conditions and prevent downtime.
  • Transmission of sensor signals without interference.
  • Multiple sensor signals and sensor information (sensor ID, values for diagnosis) can be transferred in a single cable.
  • Sensor management with PC software.

Why Memosens?

It is reliable. 

Memosens is a “smart sensor” – it transforms measurement/analog readings into digital signal, right into the sensor head. From a practical point of view, this means that the reading on your transmitter won’t be affected by cable issues, signal drops, static electricity or the like. 100% signal integrity. To compare this with a more common example, it is like listening to music on an LP (vinyl disc) as opposed to through MP3 – no noise in your signal/sound due to dust, oscillating of the head, scratches, etc. In case of issues or unusual readings, troubleshooting will be much faster, as you can already rule out environmental variables such as defective cable or electrical/magnetic interference (Memosens does not have metal parts).