Capacitive level switch for bulk solids

Minicap FTC260 / FTC262

334.-NZ$
11-35 Pcs.

 


                FTC260                         FTC262

 

*

(FTC260)

 

     

  • No calibration required

  • Active build-up compensation

  • Maintenance-free

  • Easily shortened rope version

Product:
Bulk solids

Grain size:

Diameter≤ 30 mm

Process pressure:

-1 to +25 bar

Product dielectric constant:
εr ≥ 1.6

Product temperature:

FTC260: -40 to +120C

FTC262/Ex: -40 to +70C

Probe length:
Rod/FTC260:140mm

Rope/FTC262:1.5; 2.5 and 6m


Product/VersionPrice/pcs. in NZ$Order code
Minicap FTC260
Probe LengthSwitch OutputApproval1 to 34 to 1011 to 35
140mmRelay 20-253VAC/20-55VDCNon-hazardous area420.-391.-370.-FTC260-AA4D2
order
3-wire PNP 10.8-45VDCNon-hazardous area380.-353.-334.-FTC260-AA2D2
order
Relay 20-253VAC/20-55VDCATEX II 1/3 D - Ex ta/tc IIIC T105C Da/Dc570.-530.-502.-FTC260-BA4J3
order
3-wire PNP 10.8-45VDCATEX II 1/3 D - Ex ta/tc IIIC T105C Da/Dc530.-493.-466.-FTC260-BA2J3
order
Minicap FTC262
Probe LengthSwitch OutputApproval1 to 34 to 1011 to 35
2500mm L, steel HD-PE insulatedRelay 20-253VAC/20-55VDCATEX II 1/3 D - Ex tc [ia Da] IIIC T108C Dc870.-809.-766.-FTC262-BA44J3
order
3-wire PNP 10.8-45VDC830.-772.-730.-FTC262-BA42J3
order
The above models are ex stock. Please ask for pricing and delivery time of other FTC260 and FTC262 versions.
 
Product/VersionPrice/pcs. in NZ$Order code
Accessories1 to 34 to 1011 to 35
Rope shortening kit for FTC26250.-52005918
order
 

Prices are net, ex store Auckland, GST additional and valid until 30/9/2016.
EMC's standard Terms and Conditions of Supply are applicable.

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

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 ρin 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 A
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
  • Electrical connection
Terminal connector, stranded wire 1.5 mm, + sleeve, wire 2.5 mm
Accuracy
  • Long-term drift
Horizontal 3 mm, vertical 6 mm
  • Hysteresis
Horizontal 4 mm, vertical 7 mm
  • Switchpoint
Horizontal at centre of probe -5 mm,
vertical 40 mm above probe tip
Operating conditions
  • Ambient temperature
-40 to +70 C (to +60 C Dust Ex)
  • Climate class
As per standard DIN-IEC 68, 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 +120 C (to +80 C Dust Ex)
  • Process pressure
-1.0 to +25 bar
General
  • Medium
Bulk solids with grain size up to 30 mm, relative dielectric constant εr ≥ 1.6
  • Flexural strength
1400 N (at tip of probe)
  • Process connection
R 1 DIN 2999/ISO 7
  • Adapter
Inner thread R1 DIN 2999 ISO 7:
for R 1 DIN 2999/ISO 7
for G 1 DIN ISO 228
Approvals
  • Ex approval
ATEX II 1/3 D - Ex ta/tc IIIC T105C Da/Dc
  • WHG approval
Overspill protection to 19 WHG (Germany)
  • 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 A
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
  • Electrical connection
Terminal connector, stranded wire 1.5 mm, + sleeve, wire 2.5 mm
Accuracy
  • Longterm drift
Vertical 6 mm
  • Hysteresis
Vertical 5 mm
  • Switch point
Vertical 35 mm above probe tip
Operating conditions
  • Process temperature
-40 to +70 C
  • Process pressure
-1.0 to +6 bar
  • Ambient temperature
-40 to +70 C(to +60 C Dust Ex)
  • Climate class
As per standard DIN-IEC 68, 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 sizeup to 30 mm relative dielectric constant εr ≥ 1.6
  • Tensile strength
Max. 3000 N up to 40 C
  • Process connection
R 1 DIN 2999/ISO 7
  • Length reduction
Shortening kit (included in delivery)
Approvals
  • Ex approval

ATEX II 1/3 D -Ex tc [ia Da] IIIC T108C Dc

Dimensions (in mm) and materials FTC260

a) AF 41

b) PPS

Dimensions (in mm) and materials FTC262

Click on image to enlarge


a) SW50

b) PPS

Electrical connection

AC/DC-SPDT


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: earthing


DC-PNP

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: grounding

  • 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