Protection Plus with innovative corrosion protection

Capacitive RF probe with full coating protection

In power plants, the demands made on the fill level sensors can be very high due to the fact that the sensors come into contact with aggressive media such as sulphur oxides, heavy metals or even acids.  Where limit switches are used for dust detection in flue gas cleaning, they need to be robust enough in order to deliver reliable and consistent performance.  Often maintenance costs or replacement of these sensors can be very high due to their quality not being adequate to meet the demands and so they achieve only a short operating life. This is particularly evident in measurement tasks in flue gas cleaning within waste incineration plants.


Longer service life due to increased corrosion resistance

UWT has further developed the RFnivo® 3100 capacitive level limit switch for this type of measurement task in the dust extraction of flue gases so that it meets and withstands the demanding conditions. All process-contacting parts of the sensor have been designed to be completely corrosion-resistant. Firstly, the RF boom is coated with PFA Teflon® and, secondly, a section of the process connection thread has been completely made of PTFE so that all parts in contact with the process are fully corrosion-protected.


Probe boom with PFA full coating

The shaft of the RFnivo® limit switch is fully coated with PFA Teflon®. It is resistant to almost all chemicals and can withstand high temperatures. In contrast to a spray coating, the type of coating of the RF probe is much more resilient, up to 1.5mm thick, and thus has more protection in abrasive applications.

The RFnivo® 3100 with fully coated probe boom can be made with a boom length from 200mm up to 1500mm and can therefore be used in a variety of installations.


Process connection thread made of PTFE

In order to ensure full and comprehensive protection of the process-contacting probe extension the process connection thread, which is connected to the boom, is made completely from PTFE Teflon®.


In plastics, PTFE is the material that offers most resistance to most basic chemicals. Apart from liquid sodium and fluorine compounds, PTFE is resistant to almost all media even at higher temperatures. Corrosion on the thread itself is thus reduced by a special design using Teflon®. Due to the extremely low surface tension of PTFE, no dust-like materials from the flue gas filters stick to or cake the process connection thread. In addition, the capacitive RF limit switch already offers a particularly high load capacity in the standard version. If overpressure is present in the process tank, this can be up to 25 bar for and still the RF probe will operate.

Link to Flyer


Advanced technologies for flue gas dust extraction

The capacitive fully-coated RF sensor is a new safe solution for all systems where applications with a particularly aggressive process environment exist. This is, for example, wherever flue gas cleaning takes place. In addition to waste-to-energy plants, this situation applies to biomass plants, peat and coal power plants. Improved corrosion protection of measurement sensors in certain processes for flue gas cleaning is an important topic for sludge combustion in chemical plants as well as for sawmills with integrated incineration plants for the production of energy.





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87488 Betzigau, Germany

Tel: +49 831 571 23 - 0
Fax:+49 831 571 23 - 10

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UWT Locations

Our offices - worldwide

UWT worldwide

UWT GmbH - Level Control

The UWT Headquarter in Betzigau

Westendstr. 5
87488 Betzigau, Deutschland

Tel: +49 831 57123-0
Fax: +49 831-57123-10

Contact: Kevin Walter

Route Planner

Adpro-Instruments / Member of UWT Group

Foundation of a production plant in Malta


Second UWT production plant in:

Paola, Malta

UWT (UK) Ltd

Foundation of the sales subsidiary UWT (UK) Ltd.

20 Main Road, Dorrington
SY5 7JW, Shrewsbury, Shropshire, UK

Tel:  +44 1743 718883
Fax: +44 1743 718883

Contact: Graeme Hughes

UWT Level Controls LLC

Foundation of the joint venture with "UWT LLC"

4445 Malone Road
P.O. Box 18769
38118, Memphis TN, USA

Contact: Don Crader / David Spratlin

Tel: +1 901 531 6090
Fax: +1 901 531 6095


UWT Level Control India Pvt. Ltd.

The subsidiary in India

Head Office:
UWT Level Control India Pvt. Ltd.
Plot No 52 Udyog Vihar Phase-VI
Sector 37 122001
Gurugram-Haryana, India

Phone: +91 124 412 1600
Fax: +91 124 412 1611 


Contact: Sumit Majumder
Managing Director
Mobile: +91 9830879115

Flat – 3B, 9 Majhipara Road
James Long Sarani
Kolkata – 700 063, India

North Regional Office:
UWT Level Control India Pvt Ltd.
Plot No 52 Udyog ViharPhase-VI
Sector 37 122001
Gurugram-Haryana, India

Phone: +91 124 412 1600
Fax: +91 124 412 1611 

Contact: Prakhar Kapoor
Asst. Area Manager
Mobile: +91 971 721 3939

West Regional Office:
UWT Level Control India Pvt Ltd.
RK Plaza, Survey No. 206/3
Plot No. 17 Viman Nagar
Pune-411014, India

Phone: +91 202 674 1000
Fax: +91 202 674 1001 

Contact: Vikas Kirange 
Area Manager
Mobile: +91 8698904455 

East Regional Office:
UWT Level Control India Pvt. Ltd.
Flat – 3B, 9 Majhipara Road
James Long Sarani
Kolkata – 700 063, India

Contact: Sunirmal Bardhan
Regional Manager
Mobile: +91 9830400715

South Regional Office:
UWT Level Control India Pvt. Ltd.
No-23, 21st Street
J B Estate, Avadi
Chennai 600 054, India

Contact: Mr. J. Yuvaraj
Asst. Area Manager
Mobile: +91 9840504819


Central India Office:
UWT Level Control India Pvt. Ltd.
House No. E-13, First Floor
Vardhman Green Park, Ashoka Garden
Bhopal, Madhya Pradesh 462023

Contact: Mr. Gaurav Kaushik
Assistant Area Manager – Central India
Mobile: +91 9650695507

UWT RUS Level Measurement LLC

Foundation of the sales subsidiary UWT RUS Level Measurement

Dorozhnaya St., 8 b. 1, Of. K2-220
117545 Moscow
Russian Federation

Phone: +7 499 723-75-73

Andrey Kireev
Phone: +7 915 400 3621

Stanislav Biryukov
Phone: +7 926 60 60 240


UWT International Trading (Shanghai) Co., Ltd.

UWT China moves into new premises

1st Floor, Plant No. 7,
Lane 333, Zhujian Road
Huacao Town, Minhang District
201107, Shanghai, China

Tel: +86 216 4684193
Fax: +86 216 4696707

Contact: Wei Gao
E-Mail: wei.gao(at)


UWT subsidiary in Brazil

Rua Aguaçú 171,
Sala 102 – Bloco Ipê - Alphaville
13098-321 Campinas - SP


Contact: Jose Antonio Zaatar
E-Mail: contato(at)