Capacitive point level switch for bulk solids

Capacitive point level switch for bulk solids

Minicap FTC260 / FTC262

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    • No calibration required

    • Active build-up compensation

    • Maintenance-free

    • Easily shortened rope version

    Specs at a glance

    Function Level switch
    Product Bulk solids
    Grain size Diameter ≤30 mm (1.18")
    Process pressure –1 to +25 bar (–14.5 to +363 psi)
    Product dielectric constant εr ≥ 1.6
    Product temperature

    FTC260: –40 to +120 °C (–40 to +248°F)

    FTC262/Ex: –40 to +70 °C (–40 to +158°F)
    Probe length

    Rod/FTC260: 140 mm (5.51")

    Rope/FTC262: 1.5; 2.5 and 6 m (4.9; 8.2 and 19.69 ft)

    Minicap FTC260

    Product / VersionPrice / pcs. in CADOrder code
    Probe lengthSwitch OutputHousing; Cable EntryApproval1 to 34 to 1011+
    140mm3-wire PNP 10.8-45VDCF14 Polyester IP66; thread NPT1/2General Purpose353328311 FTC260-xB2B1
    Select options
    F34 Alu IP66; thread NPT1/2 NEMA Type 4 Encl.General Purpose392364345 FTC260-xB2H1
    Select options
    Classified areas430400378 FTC260-xB2H1
    Select options
    Relay 20-253VAC/20-55VDCF14 Polyester IP66; thread NPT1/2General Purpose381354335 FTC260-xB4B1
    Select options
    F34 Alu IP66; thread NPT1/2 NEMA Type 4 Encl.General Purpose420390369 FTC260-xB4H1
    Select options
    Classified areas458426403 FTC260-xB4H1
    Select options

    Minicap FTC262 : Extension cable versions

    Product / VersionPrice / pcs. in CADOrder code
    Probe LengthSwitch OutputHousing; Cable EntryApproval1 to 34 to 1011+
    1500mm/59in L, steel HD-PE insulated3-wire PNP 10.8-45VDCF14 Polyester IP66; thread NPT1/2General purpose548509482 FTC262-xB32B1
    Select options
    F34 Alu IP66; thread NPT1/2 NEMA Type 4 Encl.General purpose585544515 FTC262-xB32H1
    Select options
    Classified areas621578547 FTC262-xB32H1
    Select options
    Relay 20-253VAC/20-55VDCF14 Polyester IP66; thread NPT1/2General purpose574534505 FTC262-xB34B1
    Select options
    F34 Alu IP66; thread NPT1/2 NEMA Type 4 Encl.General purpose612569538 FTC262-xB34H1
    Select options
    Classified areas648603570 FTC262-xB34H1
    Select options
    2500mm/98in L, steel HD-PE insulated3-wire PNP 10.8-45VDCF14 Polyester IP66; thread NPT1/2General purpose560521493 FTC262-xB42B1
    Select options
    F34 Alu IP66; thread NPT1/2 NEMA Type 4 Encl.General purpose597555526 FTC262-xB42H1
    Select options
    Classified areas634589558 FTC262-xB42H1
    Select options
    Relay 20-253VAC/20-55VDCF14 Polyester IP66; thread NPT1/2General purpose587546516 FTC262-xB44B1
    Select options
    F34 Alu IP66; thread NPT1/2 NEMA Type 4 Encl.General purpose624580549 FTC262-xB44H1
    Select options
    Classified areas660614581 FTC262-xB44H1
    Select options

    Accessories

    Product / VersionPrice / pcs. in CADOrder code
    Cover F14 PE, transparent PA Sight glass: Polycarbonat PA.54.84 943201-1001
    Add to cart
    Rope shortening kit FTC262 Usage: FTC262.43.70 52005918
    Add to cart

    Prices valid until 30.09.2019 in CAD per unit (not including shipping and applicable sales taxes). See
    Endress+Hauser Terms and Conditions

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  • Application

    The Minicap is suitable for the level detection of powdery and fine-grain bulk solids, such as grain, flour, powdered milk, mixed feed, cement, chalk or gypsum and is suitable for use in dust explosive areas (ATEX II 1/3 D). The Minicap has two output options:

    • Relay output (SPDT) or
    • PNP output

    Function

    The Minicap is an electronic switch. When the limit is exceeded or the load falls below the limit, a switching signal is output. A switch housing or signal output device (e.g. lights, horns, programmable logic sequencer, stored program control, etc.) can be connected to the Minicap. It has an in-built switch-over facility for minimum/maximum safety. It detects the formation of deposits on the probe, and compensates for the effects of this so that the switching point is maintained. The Minicap comes with factory settings.

    Other sensitivity adjustments can be made on the housing.

    Application Example

    Capacitive level switch for bulk solids - Application example

    Level detection in silos with bulk goods. The silos can be made of various materials (e.g. metal, plastic, concrete), as these do not affect measurement.

    The filling stream should not be directed onto the probe.

     

    a) load

    Applications

    Examples ρ in g/l (approx.) εr (approx.) Function
    Grain, seed, legumes and their products
    Rice 770 3.0 yes
    Cornstarch (packed) 680 2.6 yes
    Flour (wheat) 580 2.4 yes
    Corn grist 500 2.1 yes
    Sunflower seeds 380 1.9 yes
    Noodles 370 1.9 yes
    Bran (wheat) 250 1.7 yes
    Popcorn 30 1.1 no
    Minerals, inorganic materials
    Cement 1050 2.2 yes
    Plaster 730 1.8 yes
    Chalk (packed) 540 1.6 (yes)
    Chalk (loose) 360 1.4 no
    Plastics
    ABS granulate 630 1.7 yes
    PA granulate 620 1.7 yes
    PE granulate 560 1.5 no
    PVC powder 550 1.4 no
    PU dust 80 1.1 no

    Grey background:
    Application limits of Minicap exceeded.

     

    In general:

    If the dielectric constant of the solid is not known, then the density of the solid is a deciding factor. Under normal conditions the Minicap functions in foodstuffs with a density of 250 g/l and above or in plastic or mineral materials with a density of 600 g/l and above.

  • Technical data FTC260

    Output
    Output signal

    DC-PNP: Imax 200 mA, secure against overload and shorting, residual voltage at transistor at Imax < 2.9 V

    AC/DC-SPDT:
    AC: Imax = 4 A, Imin = 1 mA, Umin = 6 V, Umax = 253 V, Pmax = 1000 VA
    DC: Imax 4 A up to 30 V, Imax 0.2 A up to 253 V
    Malfunction signal

    DC-PNP: < 100 µA

    AC/DC-SPDT: relay de-energised
    Switching delay 0.5 s upon release/covering
    Power supply
    Supply voltage DC-PNP: 10.8 to 45 V DC, short pulse up to 55 V DC, current input 30 mA (max.), reverse polarity protection AC/DC-SPDT (relay contact): 20 to 253 V AC or 20 to 55 V DC, max. current input: 130 mA
    Terminal compartment Stranded wires max. 1.5 mm2 in end sleeves, Electric wire max. 2.5 mm2
    Accuracy
    Long-term drift Horizontal ±3 mm (±0.12"), vertical ±6 mm (±0.24")
    Hysteresis Horizontal 4 mm (0.16"), vertical 7 mm (0.28")
    Switchpoint Horizontal at centre of probe –5 mm (–0.2"), vertical 40 mm (1.58") above probe tip
    Operating conditions
    Ambient temperature –40 to +80 °C (–40 to +176°F)
    (to +60 °C/140 °F Dust Ex)
    Climate class As per EN 60068 part 2-38
    Protection system IP 66
    EMC Interference Emission to EN 61326, Electrical Equipment Class B; Interference Immunity to EN 61326, Annex A (Industrial) and NAMUR Recommendation NE 21 (EMC)
    Process temperature –40 to +130 °C (–40 to +248 °F) (to +80 °C/176 °F Dust Ex)
    Process pressure –1.0 to +25 bar (–14 to +363 psi)
    Material
     Wetted parts Probe: PPS GF40; FDA: FCN No. 000040 
    General
    Medium Bulk solids with grain size up to 30 mm (1.18"), relative dielectric constant εr ≥ 1.6
    Flexural strength 1400 N (at tip of probe)
    Process connection NPT1
    Approvals
    Ex approval ATEX II 1/3 D
    FM Cl. II, III, Div 1, Gr. E-G
    CSA DIP Cl. II, Gr. E-G Cl. III
    Sensor material is FDA registered

    Technical data FTC262

    Output
    Output signal

    DC-PNP: Imax 200 mA, secure against overload and shorting, residual voltage at transistor at Imax < 2.9 V

    AC/DC-SPDT:
    AC: Imax = 4 A, Imin = 1 mA, Umin = 6 V, Umax = 253 V, Pmax = 1000 VA
    DC: Imax 4 A up to 30 V, Imax 0.2 A up to 253 V
    Malfunction signal

    DC-PNP: <100 µA

    AC/DC-SPDT: relay de-energised
    Switching delay 0.8 s upon release/covering
    Power supply
    Supply voltage

    DC-PNP: 10.8 to 45 V DC, short pulse up to 55 V DC, current input 30 mA (max.), reverse polarity protection

    AC/DC-SPDT (relay contact): 20 to 253 V AC or 20 to 55 V DC, max. current input: 130 mA
    Terminal compartment Stranded wires max. 1.5 mm2 in end sleeves, Electric wire max. 2.5 mm2
    Accuracy
    Longterm drift Vertical ±6 mm (0.24")
    Hysteresis Vertical 5 mm (0.2")
    Switch point Vertical 35 mm (1.38") above probe tip
    Operating conditions
    Process temperature –40 to +80 °C (–40 to +176 °F)
    Process pressure –1.0 to +6 bar (–14.5 to +87 psi)
    Ambient temperature –40 to +80 °C (–40 to +176 °F)
    (to +60 °C/140 °F Dust Ex)
    Climate class As per EN 60068 part 2-38
    Protection system IP 66
    EMC Interference Emission to EN 61326, Electrical Equipment Class B; Interference Immunity to EN 61326, Annex A (Industrial) and NAMUR Recommendation NE 21 (EMC)
    General
    Medium Bulk solids, grain size up to 30 mm (≥1.18"), relative dielectric constant εr ≥ 1.6
    Tensile strength Max. 3000 N up to 40 °C (104 °F)
    Process connection NPT1½"
    Length reduction Shortening kit
    Approvals
    Ex approval

    ATEX II 1/3 D
    FM Cl. II, III, Div 1, Gr. E-G
    CSA DIP Cl. II, III Gr. G + coal dust Cl. III

    Dimensions in mm (in inches)

    Capacitive level switch for bulk solids - Dimensions of the short version

    a) Minicap FTC260

    b) Wall thickness: 5 (0.2 in)

    c) Minicap FTC262

    d) Aluminum housing, IP66

    e) Polyester PBT-FR housing, IP66

    f) Top view, FTC260 / FTC262

    g) Adapter for FTC260

    * Height for cover with sight glass

    Installation according to instruction manual

    Electrical connection

    AC/DC-SPDT

    Capacitive level switch for bulk solids - Connecting the SPDT relay version

    Minicap FTC260/262 with AC or DC connection and relay output (SPDT)

    F1: fine-wire fuse for protection of relay contact depending on the connected load

    F2: fine-wire fuse, 500 mA

    M:  earth connection to silo or to metal parts of silo

    E:   earth

    DC-PNP

    Capacitive level switch for bulk solids - Connecting the DC-PNP version

    Minicap FTC260/262 with PNP DC connection:

    F:  fine-wire fuse 500 mA

    R:  connected load, e.g. stored programme control, programmable logic sequencer, relay

    M: earth connection to silo or to metal parts of silo

    E:  earth

     

    • The Minicap system is protected against reverse polarity.
    • If the connections are reversed, then the green light goes out.
    • No grounding lines (PE) or potential matching lines (PAL) are required with FTC260.
    • The PAL line has to be connected according to local Ex-guidelines
  • More documents for FTC260
    More documents for FTC262