Data logger
ESS3 A1
Data logger with an axial sensor
The ESS3 A1 series devices measure pressure in water networks and are suitable for short-term measurements for fault localization as well as for long-term monitoring.
Other applications include the validation of pipe network calculations and the documentation of leakage tests according to DVGW W400-2.
Measurement parameters
- Absolute pressure
- Temperature

-
Extremely robust for field use
(Ex-approval + IP68)
- Self-sufficient long-term operation (battery + memory)
-
Contactless data readout
(IrDA)
Typical applications
The ESS3 A1 is particularly suitable for:
Fault analysis in the gas network
Long-term monitoring in water networks
Pipeline network calculation
Leak testing G469 / W400-2
Sensor
The sensor is the metrological link to the application.
Performance and user-friendliness are therefore paramount:

Sensor replacement by the user is possible and immediately ready for operation without recalibration
Stainless steel encapsulated, piezoresistive sensor with high long-term stability, resistant to aggressive media
High resolution of measured values; multiple measuring ranges possible for a single sensor
Measurement of media temperature
High measuring rates due to high natural resonant frequency, making it ideal for measuring pressure surges
High overpressure safety and high burst pressure
Sensibly graded fixed and user-definable measuring ranges and various accuracy classes up to ± 0.05% of the F.S. (Full Scale)
Technical Data
| Application | Measurement and Storage of Pressures in Water Supply Systems for Monitoring and Fault Analysis; Validation of Pipeline Network Calculations |
| Sensor Connections | One radial sensor connection (M30) for connecting a pressure sensor |
| Explosion Protection Class | Ex II 2G Ex ib IIC T4 Gb |
| Protection Classes, Housing | Depending on the sensor: IP67 for gauge pressure, IP68 for absolute pressure; W × H × D [mm]: 108 × 108 × 134; Weight [kg]: 1.2 |
| Pressure Sensor Measurement Ranges | Absolute Pressure: 0 … 2.5/10/25/100 bar; Gauge Pressure and additional measuring ranges available on request |
| Temperature Sensor Measurement Ranges | -20 °C … +40 °C (internal temperature sensor) |
| Initial Measurement Accuracy | Depending on the sensor (up to 0.05% FS) |
| Resolution | Up to 0.004% FS |
| Communication Interfaces | IrDA; Display; Keypad |
| Operating Data | Battery operation up to 8 years |
| Display Information | Current Value; Maximum and Minimum Value as well as Differential Value; Memory Usage and Battery Status |
| Settings | Time and Date; Upper and Lower Alarm Threshold; Averaging (2 … 600 values); Resolution; Measurement Location Name (29 characters); Storage Method (rolling/static) |
| Operation | Via menu using keypad; Via TfsWin III software using IrDA interface cable |
| Data Storage | 250,000 date-time values / 512 kB |
| Typical Range | 2 years (through data compression) |
| Software | TfsWin III for parameterization, visualization, analysis and archiving of data |
Service
We will answer your questions in the administrative and commercial area.
+49 721 680381-30
Support
For technical support for your product, you can open a support ticket.
Sales
The sales department is your central contact for product inquiries and quotation preparation.
+49 721 680381-20
Downloads
Here you will find various downloads to support you.
Brochures, data sheets and application reports – we have all the relevant information for you here.
Blog
News from the UNION world.
Lots of news from the world of measurement technology.
Products
Special products for your industrial application.
Our range includes CWD calorimeter devices, INCA analyzers, ESS devices and much more.