Senvolon radar level sensor RD with integrated Wi-Fi antenna, front view of the housing with 80 GHz radar sensor
Water tank with installed Senvolon radar level sensor RD. Millimeter-accurate radar level measurement up to 40 meters fill height, low-maintenance thanks to contactless measurement, suitable for all tank geometries, with MIN/MAX monitoring
Secure Wi-Fi communication between the app and the Senvolon radar level sensor without cloud services, privacy and data independence guaranteed
Specifications of the Senvolon radar level sensor: 80 GHz radar, IP65 protection rating, 230 V power supply with 2-meter connection cable and Schuko plug
Dimensions of the Senvolon radar level sensor in millimeters: 55 x 39 x 108, with 6-millimeter mounting holes
Configuration options of the Senvolon radar level sensor in the app. Compatible with Apple iOS and Google Android, millimeter-accurate readings, common tank geometries pre-configured, additional ones definable via tank calibration tables
Future-proof hardware and software. Compatible with common smart home solutions like Node-RED, Home Assistant, ioBroker, or OpenHAB, thanks to MQTT
Senvolon's quality promise: 3-year warranty, free updates, Made in Germany, English-speaking support, instructions in English, CE certified
Senvolon Radar Level Sensor RD Wi-Fi, Millimeter-Accurate up to 40 m, Optimized for Liquids
Senvolon radar level sensor RD with connected external Wi-Fi antenna
Senvolon radar level sensor RD as a set with external Wi-Fi antenna and mounting bracket
Senvolon radar level sensor RD in the variant with RP-SMA connector for an external Wi-Fi antenna
Senvolon radar level sensor RD as a set with RP-SMA connector and external Wi-Fi antenna for shafts with weak reception
Senvolon radar level sensor RD with RP-SMA connector and mounting bracket
Senvolon radar level sensor RD with mounting bracket for attachment on or in the tank opening

Senvolon Radar Level Sensor RD Wi-Fi, Millimeter-Accurate up to 40 m, Optimized for Liquids

289,00 € including tax

SKU: SEN180

In stock, delivered within 2-4 business days

Wi-Fi Antenna: Standard (Integrated Antenna)
Antenna integrated in the housing. Suitable where Wi-Fi reception at the mounting location is good.
Mounting Accessories: Without Mounting Bracket

Not sure which version you need? Open the buying guide

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Contactless level detection using 80 GHz RADAR, even in fog, dust, or condensation

The Senvolon Level Sensor RD uses 80 GHz RADAR technology, the industry standard for level measurement that has proven itself in process industry applications for years. Since measurement is contactless and has no moving parts, the sensor is robust and low-maintenance. Liquids are measured to the millimeter, up to 40 m deep. Fog, dust, or condensation in the tank do not affect the measurement. MIN/MAX monitoring is built in, and the housing is IP65-protected. It can be integrated into Home Assistant or ioBroker via MQTT . Evaluation runs locally with no cloud required; optional cloud services hosted in Germany are available, for example for push notifications on the go.

  • Millimeter-accurate up to 40 m: 80 GHz RADAR technology with MIN/MAX monitoring
  • Industry-standard RADAR: Robust and low-maintenance thanks to contactless measurement with no moving parts
  • Unaffected by fog, dust & condensation: Reliable even under difficult measurement conditions
  • Smart home in real time: Integration via MQTT into Home Assistant, ioBroker & Co.
  • Local data processing: Operation with no cloud required
  • IP65-protected: Also suitable for outdoor use

Fog, dust and condensation resistant Fog, dust and condensation resistant
3-year warranty 3-year warranty
Made in Germany Made in Germany
Flexible smart home integration Flexible smart home integration
Optional cloud access Optional cloud access
Privacy-friendly Privacy-friendly
Free software updates Free software updates
English-speaking support English-speaking support

Description

Measurement method: RADAR-based (80 GHz band, 77-81 GHz), contactless

Safety notice: The Senvolon level sensor is not intended for use in tanks with flammable liquids (e.g. heating oil, diesel, or gasoline).

Optimized for: Liquids

Measuring range / tank depth: 0.15 - 40 m

Antenna opening angle: +/- 25°

Resolution: 1 mm

Accuracy: +/- 5 mm

WLAN: Frequency 2.4 GHz, integrated Wi-Fi antenna

Protection rating: IP65

Protection class: II

Temperature range: -20 °C to +40 °C

Power supply: 230V AC (socket)

Power consumption: 1 W

Dimensions (WxHxD): 55 x 39 x 108 mm

Weight: 115 g

Connection cable length: 2 m (replaceable or extendable)

Installation and integration

Smart Home Integration

Easy integration into common smart home solutions such as Home Assistant, OpenHAB, ioBroker or Node-RED via MQTT. Also supports MQTT Discovery for Home Assistant.

Web browser/HTTP API

Direct access and configuration via web browser. Additionally: retrieval of readings in JSON format via HTTP is possible.

Optional Remote Access

Cloud service enables worldwide access to real-time data over the internet. Web app for iOS and Android is available, activation of push notifications possible.

Switching Signal Output

Features an internal switching signal output for automatic control of pumps, alarms or notifications (controlled by MIN/MAX monitoring).

Flexible Installation

The RD level sensor can be mounted on or in the tank opening; a clear line of sight to the surface is required. Reliable initial setup requires sufficient Wi-Fi coverage. By default, the connection runs through the integrated Wi-Fi antenna. The RD level sensor is also available with an external antenna connector and external Wi-Fi antenna, allowing the antenna to be positioned flexibly: ideal for ensuring stable Wi-Fi connections even under difficult reception conditions.

Package contents

  • Senvolon level sensor RD
  • Connecting cable (2 m)
  • Quick start guide

Downloads & Support

User Information/Manual:

User manual.pdf

Firmware

Free firmware updates for new features and improvements. Firmware can be updated via the web interface or here.

Support

English-speaking support (info@senvolon.deand support@senvolon.de).

Application area: rainwater tank

Reliably measure the fill level in the rainwater tank

The Senvolon level sensor monitors the current water level in real time. Among other things, this allows homeowners to know the available water quantity in their rainwater tank precisely at any time and plan its use more efficiently.

Learn more

Product Comparison

Senvolon LiDAR Level Sensor LD Wi-Fi, Centimeter-Accurate up to 12 m, for Liquids and Solids Senvolon LiDAR Level Sensor LD Wi-Fi, Centimeter-Accurate up to 12 m, for Liquids and Solids
Senvolon Radar Level Sensor RD Wi-Fi, Millimeter-Accurate up to 40 m, Optimized for Liquids Senvolon Radar Level Sensor RD Wi-Fi, Millimeter-Accurate up to 40 m, Optimized for Liquids
Measurement technology LiDAR, contactless Radar, 80 GHz, contactless
Wi-Fi antenna integrated, or with an external connector for an external Wi-Fi antenna integrated, or with an external connector for an external Wi-Fi antenna
Smart home integration
Remote control via German cloud possible
Power supply 230V AC (power outlet) 230V AC (Wall socket)
Housing dimensions (mm) 75 x 39 x 108 mm 55 x 39 x 108 mm
Suitable for Liquids and Solids optimized for liquids
Measurement accuracy +/- 5 cm +/- 5 mm
Maximum measurement depth 12 m 40 m
Price 189,00 € 289,00 €

FAQ

Frequently Asked Questions

Answers to frequently asked questions.

What warranty do you offer on your products?

We grant a three-year warranty on all our products. This covers manufacturing and material defects.

Which level sensor variant (LiDAR or RADAR) is best suited for my use case?

We offer the level sensor based on two contactless technologies. The choice depends on the precision required and the ambient conditions:

LiDAR (light)

  • Accuracy: centimeter-accurate
  • Maximum range: 12 meters
  • Optimized for: liquids and solids such as pellets
  • Special features: none

RADAR (microwave)

  • Accuracy: millimeter-accurate
  • Maximum range: 40 meters
  • Optimized for: liquids
  • Special features: insensitive to fog, dust, steam, and condensation

Both versions are optionally available with an external antenna connector.

For which tanks, containers, and applications is the level sensor suitable?

The fill level can be measured in any container geometry within the maximum range (12 m for LiDAR, 40 m for RADAR). Typical application scenarios include:

  • Water tanks in gardens
  • Rainwater tanks
  • Wells
  • Agricultural silos
  • Pellet stores and salt stores