NB-IoT Ultrasonic Level Sensor


Remotely monitor tank fluid levels with the Tekelek 811. Suitable for use alongside GSM (2G), LTE-M (Cat-M1) and NB-IoT networks.

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The NB-IoT ultrasonic level sensor from Tekelek is a flexible device which can be remotely configured to meet your needs. With an integrated cellular modem, this ultrasonic level sensor can be used alongside GSM (2G), LTE-M (Cat-M1) or NB-IoT networks.

Suitable for remotely monitoring liquid levels, this NB-IoT Ultrasonic level sensor can be used to monitor:

  • Fuel – oil, Kerosene, Diesel
  • Lubricants
  • DEF/AdBlue
  • Coolants
  • Water
  • Waste Oil
  • Waste Water
  • Selected Chemicals *contact us to check compatible products
  • Fixed or portable tanks

This smart device enables you to:

  • Optimise deliveries and collections
  • Carry out spot and continuous inventory measurements
  • Ensure a continued supply

With the option to utilise programmable alerts, the TEK811 NB-IoT ultrasonic level sensor can be used to alert you to:

  • Full alert
  • Spill alert (bunded tanks)
  • Low & high levels
  • Empty alert
  • Fill alert
  • 24/7 remote tank monitoring

Utilising NB-IoT technology, this device can be easily connected by inserting a cellular IoT SIM card. Get in touch today to check coverage in your area.

A LoRaWAN® version of this sensor can also be purchased from Alliot Technologies. Contact us to discuss the best technology option for your application.


  • Suitable to be used alongside GSM (2G), LTE-M (Cat-M1) or NB-IoT networks
  • 24/7 monitoring
  • Optimise deliveries & collections
  • Remote Configurability
  • Easy to install
  • CE conformance, ROHS & PTCRB compliant
  • Up to 5 years battery life


Battery 4 of Type C LR14 Alkaline 1.5V
Wireless Technology GSM (2G), LTE-M (Cat-M1) or NB-IoT
Radio Frequency Cat M1/Cat NB1: LTE FDD: B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/B20/B26/B28 LTE TDD: B39 (For Cat M1 Only) EGPRS: 850/900/1800/1900MHz
Gauge Type Ultrasonic
Ultrasonic Range >12 cm to <400 cm /<4.7″ to <157″ at 20°C
Weight 530g including battery
Dimensions 101mm (W) x 93mm (L) x 150mm (H)
Operating temperature -20°C to +50°C (-4°F to +122°F)
Environmental Protection IP67 Rated

Key documents & information

Discounted Trade Pricing: Contact us for trade pricing, to place an order or to discuss your IoT projects.

All of our products are available to customers throughout Europe. For more information on shipping costs, currency conversions and lead times, please contact our technical sales team.

Our technical sales team are also happy to advise customers on the best NB-IoT Fluid Measurement sensors to suit specific project requirements.

For simple deployment and ongoing management of your NB-IoT solutions, check out our cellular IoT middleware platform, Symbius. Designed to enable you to make the most of your data, Symbius will take the headache out of decoding your data for you.

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Additional information

Weight 520 g
Dimensions 93 × 101 × 150 mm



Environmental Protection

IP67 Rated

Measurements Taken

Power Source




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