Coat-Endure-T – Compact Switch For Sticky Media

Coat-Endure-T is an innovation resulting from the success of Coat-Endure and an unmet need of a compact coating immune admittance based level switch. Whereas compact vibrating forks for liquids have proven to be very successful for space constrained silos; slurries and pastes tend to be sticky, where vibrating forks could malfunction due to a coating of application material.

Mounting Arrangement for Coat-Endure-T

The instrument when calibrated at a single point i.e. in air, can be used with a variety of materials for level detection. When material reaches the switching point, the instrument detects the presence of the material and changes the outputs accordingly. The relay contacts / PNP output / current output can be used for maintaining the level of the material within the desired range in the tank.

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Coat-Endure is an improvement over traditional principle of admittance. The ring type probe has alternating active and inactive regions,which help the controller to calculate the extent of coating on probe. In effect the device is able to identify the relative coating between sense and the shield by measuring their individual capacitances. As the coating immunity is controlled by the on board microcontroller, the extent of coating immunity can be set easily.

  • Suitable for conductive and non-conductive media
  • Power Supply: 12V –30V DC
  • Compact probe lengths :  min. 65mm
  • Immune to fluctuations in process parameters like temperature, dielectric constant of the media and variable build up patterns
  • Material Independent calibration, faster installation and commissioning
  • Easy to clean tri-clamp mounting for hygienic applications
Mechanical Specifications

Probe Length

  • Extendible probe length from
  • 65 mm – upto 300 mm


  • P5: IP-65 Weatherproof Housing

Process Connection(Mounting Arrangement)

  • Threaded Mounting
    • 1/2” , 3/4” , 1″ BSP/NPT
  • Flanged Mounting: As per specification

Probe Type

Refer to Application Specification before deciding on your probe

  • Rod Probes
    • PP: Part-PTFE insulated Rod Probe
    • FP: Full PTFE insulated Rod Probe
    • PE: Part-PEEK insulated Rod Probe

Wetted Parts

  • PTFE
  • S6: SS-316

Process Temperature

  • A: Ambient below 100°C
  • H1: High temperature: 100°C – 150°C ( Stand-off- 100mm)
  • HX: Extended Temperature Range with customization
Electrical Specifications

Input power supply & Outputs

  • P: 12 V to 24 V DC PNP output
  • N:  12 V to 24 V DC NPN output

Power Consumption

  • Maximum: 3W at 24 V DC with 90mA load

Failsafe Setting

  • Field selectable (through electrical connections )

Response Time

Depends on the application media. e.g. for dry sand response times are:

  • 1s Cover Delay
  • 1s Uncover Delay

Calibration Settings

Performed with the help of a magnetic key

  • Without Material (Non-conductive media)
  • With Material (Conductive media)

Sensitivity Setting

  • 5 Point sensitivity setting
  • Field Selectable (through magnetic keys)
Applications Specifications
  • Coat-Endure-T is suitable for wide variety of powders, solids, pastes, slurries and liquids where Dielectric Constant (Er) > 1.4
  • Note: Coat-Endure-T probes are application specific, for some applications it might be necessary to use a certain kind of probe. Please refer to the table before ordering your instrument, in case there is a doubt please contact our application engineers to study your application

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  • CE
  • ROHS
Switching Indication
  • 2 LED’s
  • Red: Alarm, Green: Normal

Compact Probe lengths

Coat-Endure-T values your real estate, it performs its best even in short probe lengths of 65mm.

Traditional admittance level sensors are not as effective as Coat-Endure-T in avoiding material build-up / coating with short probe lengths.

Electrical connections compatible with popular tubular type forks

Quick-on valve type DIN connector serves as a direct substitute to liquid vibrating forks in applications for solids.

Saving Process changeover time in Packaging Machines

Industries such as packaging units often require packing batches of varied media(different dielectric constants). Standard Admittance level switches require re-calibration each time the process material is changed.

Coat-Endure-T’s calibration is Application Material Independent; once calibrated in an empty tank it can work with a wide range of non-conductive media.

Intelligent Coating Immunity- Round the clock

We understand that manufacturing processes are dynamic; even with modern temperature control equipment, maintaining constant process conditions is not practically possible round the clock.

Coat-Endure-T successfully compensates the effect of varying temperature and material build-up with its microprocessor based switching algorithm.

Suitable for Sticky Conductive Materials

A concoction of chemicals, sticky slurries and dairy products such as yogurt, honey, soya lecithin, tomato ketchup (see full list here) are often viscous, sticky and more over, conductive. As a first in the industry, Coat-Endure-T has been a successful level sensor for these applications.

Easy calibration and settings

Calibration and settings can be achieved through a single magnetic key and multicoloured LED indications.

Probes as per application

  1. Part insulated – PTFE
  • Up to 150°C
  • Suitable for a wide range of media (conductive slurries, non-conductive materials, low dielectric media)
  1. Hygienic Applications
  • SS-316 / SS-316L material probe, with hygienic tri-clamp mounting arrangement is available