Point Level Detection with a Longer Reach
The Soliphant FTM21 is designed for applications where a compact point level switch needs to reach further into the vessel. Its tube extension provides sensor lengths of 500, 1000 and 1500 mm, making it suitable for different vessel sizes and installation positions.
Designed for Bulk Solids
FTM21 is intended for fine- and coarse-grained, non-fluidized bulk solids. It is particularly suited to applications where dependable high- or low-level detection is needed in silos, hoppers and process vessels. The measuring principle is vibronic, with a single-rod sensor designed for solid materials with grain sizes up to approximately 25 mm.
Stable Detection in Real Process Conditions
Material build-up and external vibration can make some level switches difficult to use. The FTM21 is designed so that its measurement is not affected by build-up or external vibration, while flow noise also does not interfere with the switching principle.
Simple Installation and Commissioning
One of the practical advantages of the FTM21 is that it does not require calibration. Its plug-and-play design keeps commissioning straightforward, while the switch status can be seen from outside the housing through the sight glass.
Built for Industrial Bulk Material Handling
The sensor uses 316L as the main wetted material, providing a robust construction for applications including building materials and other abrasive bulk solids. The device is rated for -40 to +150°C and pressures from vacuum up to 25 bar.
Suitable for Dust and Hazardous Areas
The FTM21 is available with international explosion protection certificates, including ATEX, FM, CSA, IECEx, NEPSI, INMETRO and EAC options depending on configuration. This allows the same basic measuring principle to be adapted to different plant requirements.
Key Features
- Vibronic point level switch for bulk solids
- Suitable for fine- and coarse-grained, non-fluidized materials
- 500 / 1000 / 1500 mm sensor lengths
- Minimum medium density 200 g/L
- Process temperature -40 to +150°C
- Process pressure vacuum to 25 bar
- 316L sensor material
- Measurement not affected by build-up or external vibration
- No calibration required
- Single-rod sensor
- DPDT relay or DC PNP output
- Threaded process connections
- Suitable for dust and hazardous areas
- ATEX, FM, CSA, IECEx, NEPSI, INMETRO and EAC approvals depending on configuration
Typical Applications
- Silos and storage bins — high- or low-level detection of powders and granules
- Hoppers — material level monitoring during filling and discharge
- Building materials — cement, aggregates and other abrasive bulk solids
- Food and agricultural materials — suitable for various non-fluidized powders and granules
- Chemical processing — point level monitoring of bulk solid materials
- Process vessels — simple level switching where a longer sensor reach is required
- Dust hazardous areas — installations requiring appropriate explosion protection certification
FAQ
What is the Endress+Hauser Soliphant FTM21?
The Soliphant FTM21 is a vibronic point level switch designed for detecting the presence or absence of bulk solids at a defined level.
What is the difference between FTM21 and FTM20?
Both are compact vibronic point level switches for bulk solids, but the FTM21 uses an extended tube with 500, 1000 or 1500 mm sensor lengths, while the FTM20 is the more compact version with a 225 mm sensor.
What materials can the FTM21 detect?
It is designed for fine- and coarse-grained, non-fluidized bulk solids with a minimum medium density of 200 g/L. The suitable material should also be considered together with its grain size and flow characteristics.
Does the FTM21 require calibration?
No. The FTM21 is designed for straightforward commissioning without calibration.
What are the operating temperature and pressure ranges?
The process temperature is -40 to +150°C, while the process pressure range is vacuum to 25 bar, depending on the selected configuration.
What sensor lengths are available?
The standard sensor lengths are 500 mm, 1000 mm and 1500 mm.
What outputs are available?
Depending on the selected electronic version, the FTM21 can be supplied with a DPDT relay or DC PNP output.
Can the FTM21 be used in hazardous areas?
Yes. The FTM21 is available with various international explosion protection approvals, including ATEX, FM, CSA and IECEx, depending on the selected configuration.
