Before you look start looking at level transmitters, you should know how the process evolved. It began with the advent of floats and rotary level paddles, and continued to the era of dipsticks.

Technological growth didn’t quite stop there. In fact, it took a wild ride towards electronics. This brought about methods that used ultrasound, capacitance, and radio frequencies to monitor levels.

Here are some low-cost level transmitters that may suit your needs:

1. Ecometer S

Esensorix offers Ecometer S that is clear about what it targets. It is applied in wastewater tanks and cisterns and has many options for adjustments. The device is built well and comes with useful combinations like a sensor plus a wireless module and a remote display. It follows the time of flight principle, like all ultrasonic level sensors, and it comes with some nice specs.

The display contains all the required information you may need. It is easy to set up, install, and maintain. It has a maximum measurable capacity of 19,999 liters, an intelligent algorithm setup sensitive to minute level changes, and a communication range of 500 ft.

Additionally, it has a cold-weather warning, battery status alarm, and a low-level warning. Proteus has managed to sum it up so compactly that the device stand out from the rest!

EcoMeter S Ultrasonic water cistern level sensor with separate digital display
in the shop from 123 €

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 2. EcoCloud

Esensorix offers Ecocloud that enters the field with some brilliant specs and, most importantly, a venture with the IoT platform. It does this by syncing with the data server via GSM platform and transmitting live data every 24 hours.

A web portal called the Web App displays all the information, and you can access everything using your smartphone.

The level sensor comes pre-configured by Proteus for your uses, along with a SIM card. This sensor generates historical measurement data and displays it graphically when needed. On the whole, the EcoCloud is an excellent addition to the IoT platform. Proteus offers an easy-to-install device applicable to most liquids at an accuracy of ± 10 mm.

image of E-sensorix Ecocloud
Courtesy of E-Sensorix

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3. WLR05-2G/001

SenZ2 offers WLR05-2G/001 that is the first wireless radar level transmitter applied to measure fill-levels remotely.

What gives this radar device an edge over the competition? There are many answers to this question. To begin with, radars are unaffected by temperature changes, volatiles or foam.

image of  SenZ2 WLR05-2G/001 level transmitter
Courtesy of SenZ2

The WLR05 is easy to set up, monitor and maintain with high accuracy. Its global connectivity to GSM, IoT, and SigFox networks makes it even more reliable. Furthermore, SenZ2 offers an online platform called the MakeSenZ2, which provides trends, data control, alerts and many more.

Moreover, it receives the protection of IP69. Additionally, the device comes with a ton of certifications including hazardous protection. See the picture below for better understanding!

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4. Micropilot FMR10

Endress Hauser offers Micropilot FMR10 that is one of the first radars with a Bluetooth app. The SmartBlue app requires some information such as tank capacity, water level, and fill level to configure itself to your tank.

Consequently, the real-time process information and diagnostics are at hand when you need them. Mapping of real-time data is done and displayed in the form of a video. The device has an accuracy of ± 5 mm for a process temperature of -40°C to 60°C.

image of Micropilot FMR10
Courtesy of Endress+Hauser

The device comes with a 2-wire (4-20 mA) communication output and a wide variety of process connections, including G threads and NPT threads. Additionally, approvals from CSA and a flooding protection tube add to its list of advantages.

Additionally, it also offers data protection through passwords and encryptions. The device doesn’t have a display, so there isn’t much to say about that. On the whole, the FMR10 is a suitable replacement for an ultrasonic device!

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Vega offers Vegapuls WL61 that is Bluetooth enabled and uses an app called the Vegatools. Using this, we can learn more about device features and working conditions. This comes with a process pressure of -1 to 2 bars and a process temperature of -40°C to 80°C.


image of WL 61
Courtesy of Vega

It can be applied to PROFIBUS PA, FOUNDATION Fieldbus, and 2-wire 4-20 mA HART protocols as necessary output, with threaded and flanged process connections for use.

It has a measuring range of 15 meters. Moreover, it comes with a degree of protection of IP68. If you are on a budget, but require an ideal sensor, the WL 61 is a great option.

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Moving ahead

Reading about these five devices, your attention may have been captured by one option or another when discovering their interesting features. Beyond just what your first impressions tell you, you should know what your application constraints are. Each one of the instruments mentioned above is unique in its own way, so check them out in detail, scale our your process requirements and make a wise choice!

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