FLOAT LEVEL SENSOR & TRANSMITTER

MODEL: LTS
DESCRIPTION
LTS is a float type level sensor & transmitter and are used as
sensing elements for electrical continuous remote display of
the level.
The signal is a resistance output and can be equipped with
the TU-1 Transmitter Unit to produce 4-20 Ma signal.
The standard installation is vertical over the tank with the flange
or screw connection.
The LTS is suitable for tough applications such as inflammable,
corrosive liquids or pressurized and vacuum vessels.
The LTS sensor is available in corrosion resistant material like,
SS 304, SS 316, PVC, PP and PTFE.

FEATURES
* Simple mounting and made to customer specification
* Continuous level measurement of the level with highly accurate
repeatability, regardless of the built up of Foam and will not be
affected by change of pressure or varying conductivity.
* Remote display of the level over long distances (up to 2000 m)
* Applicable for temperature up to 120 Deg C, High temperature
version up to 250 Deg C available on request.
* Every sensing elements are protected by plastic cover for safety.
* Less maintenance and lower installation cost.

OPERATION PRINCIPLE
The Float sensor, LTS work on float principle with
magnetic transmission (permanent magnet, reed
switch and resistance chain) in a three wire
potentiometer circuit.
Only one moving part - a float set on a guide tube
slides reliably up and down with the liquids.
A toroidal magnet in the float actuates tiny reed
switch with its magnetic field through the wall of
the guide tube.
These reed off an uninterrupted measurement
voltage from a resistance chain (potential divider)
and this voltage is proportional to the liquid level.
The resistance chain is very finely graduated and
soldered onto a printed circuit board.
Depending on the requirements and the design
there are various type of resolutions (distance
of each reed switch) available.
 LTS – Flange & Screw Conn Type LTS-Ferrule Clamp & Union
STANDARD
SPECIFICATION
& MODEL

SUS
Type

Application Water, Oil & General Liquid Demin Water & Sanitary Liquid
Pressure Max 16 Bar 10 Bar
Temp Max 100 °C (Std) & 150 °C (HT)
Mounting Flange or Screw (Min 1-1/2”) Clamp Ferrule or Union (Min 2”)
SG Min 490 kg/m3
Float Type FS40, FS52, FS52C
Resolution R10 (10 mm) or R15 (15 mm)
Float Material SS 316
Stem Material SS 304 or SS 316 SS 316
Conn Material SS 304 or SS 316 SS 316
Output 3 Wire Potentiometer or 4-20 mA
Terminal Box Aluminium DIN IP-65
Elect Conn Polyamid Gland, M20, IP-68

LTS-Explotion Proof HOUSING LTS-SS316 HOUSING + Ex

STANDARD
SPECIFICATION
& MODEL

SUS
Type

Application Water, Oil & General Liquid

Pressure Max 16 Bar
Temp Max 100 °C (Std) & 150 °C (HT)
Mounting Flange or Screw (Min 1-1/2”)
SG Min 490 kg/m3
Float Type FS40, FS52 or FS52C
Resolution R10 (10 mm) or R15 (15 mm)
Float Material SS 316
Stem Material SS 304 or SS 316
Conn Material SS 304 or SS 316
Output 3 Wire Potentiometer or 4-20 mA
Terminal Box AL Ex-Proof, EExdIICT6, IP-68 SS316 Ex-Proof, EExdIICT6, IP-68
Elect Conn ½” NPTF with Plastic Ex Gland
 LTS – For R06 RESOLUTION LTS – For MARINE
STANDARD
SPECIFICATION
& MODEL

SUS
Type

Application Water, Oil & General Liquid

Pressure Max 16 Bar
Temp Max 100 °C (Std) & 150 °C (HT)
Mounting Flange or Screw (Min 2-1/2”) Flange (Min 3")
SG Min 650 kg/m3 850 kg/m3
Float Type FS52L FS80
Resolution R-05 (5 mm) R-05 (5 mm), R10 (10 mm) or R15 (15 mm)
Float Material SS 316 SS 304 or SS316
Stem Material SS 304 or SS 316
Conn Material SS 304 or SS 316
Output 3 Wire Potentiometer or 4-20 mA
Terminal Box Aluminium DIN, IP-65 or SS316 Box, IP-68
Elect Conn Polyamid Gland, M20, IP-68 or 1/2" Polyamid Gland (SS316 Box)

LTP, LTCP-Flange & Screw Type LTTF-Flange Type

STANDARD
SPECIFICATION
& MODEL

PVC,
CPVC,
PTFE
TYPE

Application Waste Water & Chemical Liquids Chemical & Corrosive Liquids
Pressure Max 2 Bar
Temp Max 50 °C (PVC) & 80 °C (CPVC) 100 °C
Mounting Flange or Screw (Min 1-1/2") Flange or Screw (Min 2”)
SG Min 800 kg/m3 800 Kg/m3
Float Type FPP50, FP55 & FCP55 FCP55 or FDF55
Resolution R05 (5mm),R10 (10mm) or R15 (15mm)
Float Material PP, PVC or CPVC CPVC or PVDF
Stem Material PVC or CPVC PTFE + SS316L
Conn Material PVC PTFE + SS316L
Output 3 Wire Potentiometer or 4-20 Ma
Terminal Box ABS, IP-66 PTFE, IP-65
Elect Conn Polyamid Gland, M20, IP-68
FLOAT SPECIFICATION

P Max T Max SG A B C
MODEL MATERIAL Fig APPLICATION
(Bar) (Deg C) (Gr/cm2) (mm) (mm) (mm)
FS40 SS316 15 200 0.65 40 38 15 F2 Water,Oil, Chemicals etc
FS52 SS316 50 200 0.60 52 52 15 F1 Water,Oil, Chemicals etc
FS52C SS316 10 200 0,49 52 52 15 F2 Water,Oil, Chemicals etc
FS80 SS304/316 16 200 0,65 80 90 30 F2 Water,Oil, Chemicals etc
FP55 PVC 1 50 0,8 55 70 25 F2 Water, Acids etc
FCP55 CPVC 1 80 0,8 55 70 25 F2 Water, Acids etc
FPP50 PP 1 80 0,7 50 60 25 F2 Water, Acids etc
FPP100 PP 1 80 0,5 100 100 30 F2 Viscous Liquids, Acids etc
FDF55 PVDF 1 100 0,8 55 70 21 F2 Acids & Chemicals liquid

TERMINAL BOX
DIN TERMINAL BOX EX-PROOF TERMINAL BOX EX-PROOF SS TERMINAL BOX

TERMINAL HOUSING DIN HOUSING EX-PROOF HOUSING SS EX-PROOF

MATERIAL Die-Cast Aluminium Alloy Aluminium SS316
PROTECTION IP-65 Ex-Proof, EExdIICT6, IP-68 Ex-Proof, EExdIICT6,IP68
ELECT CONNECTION Polyamid, M20 x 1,5 1/2" NPT with Gland 1/2" NPT with Gland
AMBIENT TEMP 100 °C 100 °C 100 °C

TYPICAL APPLICATION
TRANSMITTER UNIT, 5335A, 5343B & TU
The LTS Float Level Sensor and transmitter are used as sensing elements for electrical continous remote display of the
level. The Signal is Resistance output and with the 5343B or 5335A (Hart) transmitter unit to produce 4-20 Ma Signal.

MODEL 5335A-Ex 5343B-Ex TU

POWER SUPPLY 8.0...35 Vdc 10 .... 30 Vdc
OUTPUT SIGNAL 4-20 Ma, 2 Wire , HART 4-20 Ma, 2 Wire system 4-20 Ma, 2 Wire system
Lin Resistance, 0 - 7 KΩ Lin Resistance, 0 - 100 KΩ Pot, 100-50 KΩ, 3 Wire
RTD, PT100,PT1000, Ni100 Pot, 0-100 Kohm, 3 wire
INPUT TC : B,E,J,K,L,N,R,S,T,U,W3
Voltage, -800...+800 mV
CONSUMPTION 25 mW...0.8 W
BASIC ACCURACY ≤ ±0.05% of span ≤ ±0.1% of span 0,1% FS
TEMP RANGE -40°C to +85°C -5 to +60°C
HUMIDITY < 95% RH (non-cond.) 20 - 90% RH
PROTECTION IP68 / IP00 (Housing/Terminal) IP00
DIMENSIONS Ø 44 x 20.2 mm Ø 44 x 19 mm
MAX WIRE SIZE 1 x 1.5 mm2 stranded wire 1 x 1.5 mm2 stranded wire
WEIGHT 50 g 40 g
KEMA 03ATEX1508 X KEMA 10ATEX0004 X General
II 3 GD Ex nA [nL] IIC T6..T4 II 3 GD Ex nA [nL] IIC T4..T6
II 3 GD Ex nL IIC T6...T4 or II 3 GD Ex nL IIC T4...T6 or
APPROVAL II 3 GD Ex nA [ic] IIC T6..T4 II 3 GD Ex nA [ic] IIC T4..T6
II 3 GD Ex ic IIC T6...T4 II 3 GD Ex ic IIC T4...T6
MARINE, Det Norske Veritas, Ships & Offshore
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