LTE Telemetrylogger Type 255EB
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Description
The LTE Telemetrylogger 255EB is a compact data logger that can be independently powered by batteries despite very frequent remote data transmission. In the conventional measuring site setup, a Datalogger was often supplied via solar-cells or a fixed mains connection. At many stations it won't be necessary anymore by using the more cost effective with less maintenance Telemetrylogger. Up to 9000 web-based data transmissions can be done with only one set of batteries. This means hourly remote data transmission with a minute measurement interval over a period of one year. The LTE Telemetrylogger 255EB is very often used in measuring points for surface water in order to realize a continuous and frequent transmission of measured values, also for the equipping of redundant stations.
In the case of extreme events, the ingenious alarm management also offers the possibility of event-controlled transmissions of measured data even more frequently so that you can access the latest measured values even in tense situations.
Of course, the LTE Telemetrylogger 255EB can also be used in regular groundwater wells. With hourly measurement and daily data transmission, the device has a battery life of at least 10 years.
With HT devices, you neither have to check the humidity in the device nor regularly replace desiccant cartridges. Useless work and operating costs that can be saved. Thanks to a proven filter system that has been used in different climate zones for over 20 years, reliable relative pressure measurement for measuring the water level is guaranteed.
The data transmission in the standard version takes place via the cellular network directly to a FTP server. For security reasons, the transmission can also be done by using SSL encryption. If the battery is low or in case of an alarm if limit values are exceeded, alarm messages can be sent.
Technical Data
General Data | |
Dimensions | Ø49mm, Length: 420 mm / suitable for 2 inch wells |
Housing material | Stainless Steel; POM - against net coverage; |
User interface | RS 232; via USB, serial or Bluetooth-stick |
Measuring interval | user definable from 1 second to 99 days |
Power supply | Standard: 3x Alkaline / Size: D (mono) |
Interface for probes | Standard: 1 input channel for connecting a HT probe |
Data Transmission | |
Cellular standards | 4G LTE Cat1 and Cat4 |
Transmission frequency | B1(2100MHz); B3(1800 MHz); B7(2600 MHz); B20(800 MHz); B28(700 MHz); |
Cellular network | 2G, 3G and 4G LTE |
Transfer protocol | Standard: FTP, FTPS with SSL encryption |
Alarm Management | • 2 limit values can be defined for each parameter |
Environmental conditions | |
Operating temperature | -20°C to +70°C |
Protection class | IP68; flood-proofed until 1m water column |
Connectable measuring probes
Pressure Sensor 550W
Technical Data
Measuring principle: Relative pressure measurement Dimensions: Ø22 x 125 mm Material: Stainless Steel 316 Ti Measuring ranges Water Level: selectable from 5… 300 m water column Temperature: 0 … +50°C / optional: 0…+70°C Accuracy Water Level: <0.05% of selected range (= 1cm at 20m range) Temperature: < 0.1°C 
Combi probe 550-LTC
Technical Data
Dimensions: Ø22 x 265 mm Material: Stainless Steel 316Ti / optional: Titanium Measuring range Water Level: selectable from 5… 300m water column Temperature: 0 … +50°C / optional: 0…+70°C Conductivity: 0 … 200.000 μS/ cm incl. automatic range switching Accuracy Water Level: < 0.05% of selected range (= 1cm at 20m range) Temperature: < 0.1°C Conductivity: < 0.5% of measured value, min. 2 μS/cm (0,002 mS/cm) 
Combi probe 550-PHL
Technical Data
Dimensions: Ø48 x 400mm Material: Stainless Steel 316Ti Measuring ranges Water Level: selectable from 5… 100m water column Temperature: 0..+50°C pH: 0..14 pH Accuracy Water Level: < 0.05% of selected range Temperature: < 0.1°C pH: < 0.02 pH 
PH Probe 550-PT
Technical Data
Dimensions: Ø29.5 x 250 mm Material: Stainless Steel 316Ti Measuring ranges pH: 0..14 pH Temperature: 0..+50°C Accuracy pH: < 0.02 pH Temperature: < 0.1°C 
Multiparameter Probe 550-MP1
Technical Data
Dimensions: Ø48 x 400mm Material: Stainless Steel 1.4571 Measuring range Water Level: selectable from 5… 100m water column Temperature: 0..+50°C Conductivity: 0 … 200.000 μS/ cm incl. automatic range switching pH: 0..14 pH ORP (optional): ± 2000 mV Accuracy Water Level: < 0.05% of selected range (= 1cm at 20m range) Temperature: < 0.1°C Conductivity: < 0.5% of measured value, min. 2 μS/cm (0,002 mS/cm) pH: < 0.02 pH ORP (optional): < 10 mV 
Turbidity Probe 550TR
Technical Data
Dimensions: Ø29.5 x 220 mm Material: Stainless Steel 316Ti Measuring range
selectable:0- 15 NTU
0- 150 NTU
0- 1500 NTUAccuracy: < 1% of selected range 
Multiparameter Probe 550MP-V
Technical Data
Dimensions: Ø60 x 400mm Material: Stainless Steel 316Ti Measuring range Water Level: selectable from 5… 50 m water column Temperature: 0..+50°C / Optional: 0..+70°C Conductivity: 0 … 200.000 μS/ cm incl. automatic range switching Dissolved Oxygen: 0..20 mg/l pH: 0..14 pH ORP (optional): ± 2000 mV Messgenauigkeit Water Level: < 0.05% of selected range (= 1cm at 20m range) Temperature: < 0.1°C Conductivity: < 0.5% of measured value, min. 2 μS/cm (0.002 mS/cm) Dissolved Oxygen: < 1% of measured value pH: < 0.02 pH ORP (optional): < 10 mV
Characteristics
- Designed for very long autonomous operation
- Maintenance free - no desiccant / dry cartridges required
- Direct installation in gauge pipes from 2 inch
- No synchronization of clock and standby times
- Cost-effective data transmission via cellular network
- Non-volatile flash memory for up to approx. 190,000 records
- Compact and robust design made of high quality stainless steel
- Easy installation and operation
Applications
- Use in surface water with frequent remote data transmission
- Continuous monitoring of water quality
- Measuring and monitoring of channels and rivers
- Monitoring of groundwater wells with long battery life
- For monitoring and alarming in case of saltwater intrusion