Float switch for point level detection in liquids
Liquifloat T FTS20
Linha de atendimento
+351 212 388 403
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Simple and cost-effective
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Switching element as proximity or microswitch
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Different cable materials for different liquids
Specs at a glance
Function Level switch Product Liquids Ambient temperature ≤85 °C (185 °F) Density ≥0.8 g/cm³ Ambient pressure ≤3 bar (44 psi) Product / Version Price / pcs. in EUR Order code Floatswitch FTS20; with 5m cable, Standard 1 to 3 4 to 10 11+ Liquifloat T FTS20 AC/DC PP/PVC, 5m Point level switch, float. Application: liquids. Microswitch double throw 250VAC/150VDC. Cylindric shape fits through G1. Floating body: PP (Polypropylene). Cable: PVC. Cable length: 5m. 56,- 52,- 49,- 52010122 Liquifloat T FTS20 AC/DC PP/PUR, 5m. Same as above, except cable coating: PUR 56,- 52,- 49,- 52010123 Liquifloat T FTS20 AC/DC PP/CSM, 5m. Same as above, except cable coating: CSM. 56,- 52,- 49,- 52010124 Product / Version Price / pcs. in EUR Order code Floatswitch FTS20; with 20m cable, Standard 1 to 3 4 to 10 11+ Liquifloat T FTS20 AC/DC PP/PVC, 20m Point level switch, float. Application: liquids. Microswitch double throw 250VAC/150VDC. Cylindric shape fits through G1. Floating body: PP (Polypropylene). Cable: PVC. Cable length: 20m. 111,- 103,- 97,- 71035520 Liquifloat T FTS20 AC/DC PP/PUR, 20m. Same as above, except cable coating: PUR. 111,- 103,- 97,- 71035521 Liquifloat T FTS20 AC/DC PP/CSM, 20m. Same as above, except material coating: CSM. 111,- 103,- 97,- 71035522 Product / Version Price / pcs. in EUR Order code ATEX approved floatswitch FTS20; 5m cable 1 to 3 4 to 10 11+ Liquifloat T FTS20 NAMUR PP/PVC, 5m Point level switch, float. Application: liquids. 2-wire EN60947-5-6 (NAMUR). For use with isolated amplifier. ATEX II 2G EEx ia IIB T5. Cylindric shape fits through G1. Floating body: PP (Polypropylene). Cable: PVC. Cable length: 5m. 56,- 52,- 49,- 52010119 Liquifloat T FTS20 NAMUR PP/PUR, 5m. Same as above, except cable coating: PUR. 56,- 52,- 49,- 52010120 Liquifloat T FTS20 NAMUR PP/CSM, 5m. Same as above, except cable coating: CSM. 56,- 52,- 49,- 52010121 Product / Version Price / pcs. in EUR Order code ATEX approved floatswitch FTS20; 20m cable. 1 to 3 4 to 10 11+ Liquifloat T FTS20 NAMUR PP/PVC, 20m Point level switch, float. Application: liquids. 2-wire EN60947-5-6 (NAMUR). For use with isolated amplifier. ATEX II 2G EEx ia IIB T5. Cylindric shape fits through G1. Floating body: PP (Polypropylene). Cable: PVC. Cable length: 20m. 111,- 103,- 97,- 71035516 Liquifloat T FTS20 NAMUR PP/PUR, 20m. Same as above, except cable coating: PUR. 111,- 103,- 97,- 71035517 Liquifloat T FTS20 NAMUR PP/CSM, 20m. Same as above, except cable coating: CSM. 111,- 103,- 97,- 71035518 Accessories
Product / Version Price / pcs. in EUR Order code Compression gland G1, PVC Usage: FTS20. 20,55 52010125 Tensioning weight FTS20, PA coated Usage: FTS20. 27,71 52010127 Counter nut G1, PVC Usage: FTS20. 6,17 52010126 Prices valid until 31.12.2019 in EUR per unit (not including shipping and applicable sales tax). See
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Application
The Liquifloat T FTS20 is an easy and cost-effective alternative for point level detection in liquids. It can be used as overspill or pump protection. Different cable materials are available for a range of liquids including acids, alkalis, oils and wastewater.
Function
An element built into the float switch switches when a change in level is detected. The switching process is triggered by the movement of a steel ball and, depending on the version, is carried out by an inductive initiator or a microswitch. The inductive initiator acts as a switching output and provides a switching signal to EN 60947- 5- 6 (NAMUR). The microswitch version is a two-way switch.
Application Example
Liquifloat T FTS20 for pump control.
The measuring system consists of
- a FTS20 float switch and
- a NAMUR isolating amplifier
(e.g. Nivotester FTL325N)
or
- FTS20 in AC/DC version
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Technical data
FTS20 AC/DCSwitching element Microswitch with switching ball Switching function Changeover contact Switching voltage AC: max. 250 V;
DC: max. 150 V
Switching current AC: max. 3 A; DC: max. 1 A Switching angle Upper switching point: +25° ±10°;
lower switching point: –14° ±10°,
measured to the horizontal
Process temperature
rangePVC and PUR: +5 to +70 °C (+41 to +158 °F);
CSM: –20 to +85 °C (–4 to +185 °F)Process pressure ≤3 bar (44 psi) at +20 °C (+68 °F) Density ≥0.8 g/cm³ FTS20 NAMURSwitching element Inductive proximity switch with switching ball, closed when floating Power supply 8.2 V ± 2 V Operating current < 1.2 mA unswitched; > 2.1 mA switched Reverse polarity protection Yes Switching angle Upper switching point: +15° ±5°;
lower switching point: –15° ±5°,
measured to the horizontalProcess temperature
rangePVC and PUR: +5 to +70 °C (+41 to +158 °F);
CSM: –20 to +85 °C (–4 to +185 °F)
Process pressure ≤3 bar (44 psi) at +20 °C (+68 °F) Density ≥0.8 g/cm³ Approvals TÜV 01 ATEX 1709, Ex approval: II 2G EEx ia IIB T5 CableMaterial AC/DC, PVC, CSM: cross section 3 × 0.75 mm2
PUR: cross section 3 × 0.50 mm2Areas of application and minimum cable length between fixing and floating body PVC: ≥50 mm (1.97”) suitable for water, dirty water, slightly aggressive media PUR: ≥100 mm (3.94”) suitable for fuels, heating oils, liquids containing oil CSM: ≥100 mm (3.94”) suitable for acids and alkalis Dimensions (in mm) and materials
a) Polypropylen PP
Installation according to instruction manual
Electrical connection
Inductive proximity switch with switching ball (NAMUR)
Connection indication
L+ = black or brown
L- = blue
(closing when floating)a) 1/Brown/Black
b) 2/Blue
Changeover contact (AC/DC)
Connection indication
Cable colors:
black + brown = contact open
black + blue = contact closed
(contact position when floating)a) Blue
b) Black
c) Brown
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