OPTISWITCH 4000/5000 series is a level sensor that uses a vibrating fork for detecting level. It is designed for
use in all liquids. It is not affected by foam and external vibration. It is also unaffected by variations of product
properties such as ε
HysteresisApprox. 2 mm / 0.08" with vertical installation
Integration timeApprox. 500 ms
FrequencyApprox. 1200 Hz
Operating conditions
Temperature
Temperature
TemperatureTemperature
Ambient temperature on housing-40…+70°C / -40…+158°F
Storage and transport temperature-40…+80°C / -40…+176°F
Process temperature
Process temperature
Process temperatureProcess temperature
Standard-40…+100°C / -40…+212°F
High temperature version (optional)-40…+150°C / -40…+302°F
Temperature shockNo limitation
Process pressure-1…64 bar / -14.5…928 psi
Viscosity (dynamic)0.1...10.000 mPa s (requirement: with SG=1)
Density
>0.7 g/cm2 / >0.025 lbs/in
2
Materials
Wetted parts
Wetted parts
Wetted partsWetted parts
Process fitting – thread316L
GasketsKlingersil C-4400
Vibrating element316L
Non-wetted parts
Non-wetted parts
Non-wetted partsNon-wetted parts
Housing316L and plastic PEI
Surface quality
Transistor outputTransistor output
Supply voltage10…55 VDC
Power consumptionMax. 0.5 W
Contactless electronic switch
Contactless electronic switch
Contactless electronic switchContactless electronic switch
Supply voltage20…253 VAC, 50/60 Hz, 20…253 VDC
Power consumptionApprox. 3 mA (via load circuit)
Operating elements
Operating elements
Operating elementsOperating elements
Control lampIlluminated lens for indication of the switching condition.
Mode adjustmentMin./max. adjustment through electrical connection
Electromechanical data
Electromechanical data
Electromechanical dataElectromechanical data
Plug connection1x plug M12x1 or 1x plug DIN 43650
Screwed terminalsFor wire cross-section up to 1.5 mm²
Output
Transistor output
Transistor outputFloating transistor output, overload and permanently shortcircuit-proof
Transistor outputTransistor output
Load currentMax. 250 mA
Voltage lossMax. 1 V
Turn-on voltageMax. 55 VDC
Blocking current<10 μA
Modes (adjustable)Min. / max.
Delay timeWhen immersed: approx. 0.5 s; when uncovered: approx. 1 s
Contactless electronic switch
Contactless electronic switchContactless electronic switch
Modes (adjustable)Min. / max.
Delay timeWhen immersed: approx. 0.5 s; when uncovered: approx. 1 s
Approvals
Protection category
Protection category
Protection categoryProtection category
Valve plugIP 65
Valve plug with IDC method of
termination
M12x1 plug connection (only with
transistor output)
Overvoltage categoryIII
Protection class
Protection class
Protection classProtection class
Transistor outputII
Contactless electronic switchI
CE conformity
CE conformity
CE conformityCE conformity
EMC (89/336/EEC)Emission EN 61326: 1997 (class B), immunity EN 61326: 1997/A1: 1998
LVD (73/23/EEC)EN 61010-1: 2001
SIL conformityOPTISWITCH fulfills the requirements of functional safety according to
2.4610 (Hastelloy C4) enamelled80...1500 mm / 3...59"
1.4435 (316L) ECTFE coated80...3000 mm / 3...118"
1.4435 (316L) PFA coated80...3000 mm / 3...118"
Measurement accuracy
HysteresisApprox. 2 mm / 0.08" with vertical installation
Integration timeApprox. 500 ms
FrequencyApprox. 1200 Hz
Operating conditions
Temperature
Temperature
TemperatureTemperature
Ambient temperature on housing-40…+70°C / -40…+158°F
Storage and transport temperature-40…+80°C / -40…+176°F
Process temperature
Process temperature
Process temperatureProcess temperature
316L / Hastelloy C4 (2.4610)-50…+150°C / -58…+302°F
Process temperature with temperature
adapter
316L / Hastelloy C4 (2.4610)-50…+250°C / -58…+482°F
enamelled-50…+200°C / -58…+392°F
with ECTFE coating-50…+150°C / -58…+302°F
with PFA coating-50…+150°C / -58…+302°F
Temperature shockNo limitation
Process pressure-1…64 bar / -14.5…928 psi
Viscosity (dynamic)0.1...10.000 mPa s (requirement: with SG=1)
Density
Option
0.7...2.5 g/cm2 / 0.025...0.09 lbs/in2; 0.5...2.5 g/cm2 / 0.018...0.09 lbs/in2 by
switching over
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Materials
Wetted parts
Wetted parts
Wetted partsWetted parts
Process fitting – thread316L; 2.4602 (Hastelloy C4)
Process fitting – flange316L; 316L with Hastelloy C4 coating; steel enamelled; 316L with ECTFE
Two-wire outputTwo-wire output
Supply voltage10…36 VDC (via the signal conditioning instrument)
NAMUR output
NAMUR output
NAMUR outputNAMUR output
Supply voltage (standard
characteristics)
Open-circuit voltageU0 approx. 8.2 V
Shortcircuit currentIU approx. 8.2 mA
Operating elements
Control lampControl lamp (LED) for indication of the switching condition.
Density switch (electronics versions: relay, transistor, contactless electronic switch, two-wire, NAMUR outputs)
0.5
0.7
Mode switch (electronics versions: relay output, transistor output, contactless electronic switch)
AMax. detection or overfill protection
BMin. detection or dry run protection
Characteristics reversal (electronics version: NAMUR output)
Max.Falling characteristics (Low current when immersed)
Min.Rising characteristics (High current when immersed)
Electromechanical data
Cable entry/plug (dependent on the
version) - Single chamber housing
Screwed terminalsFor wire cross-section up to 1.5 mm²
For connection to amplifier according to NAMUR IEC 60947-5-6, approx.
8.2 V
0.5...2.5 g/cm2 / 0.018...0.9 oz/in
0.7...2.5 g/cm2 / 0.025...0.9 oz/in
1x cable entry M20x1.5 (cable ø5…9 mm), 1x blind stopper M20x1.5;
attached 1x cable entry M20x1.5 or 1x cable entry ½ NPT, 1x blind stopper
½ NPT, 1x cable entry ½ NPT
2
2
Output
Relay output
Relay outputRelay output (DPDT), 2 floating spdts
Relay outputRelay output
Turn-on voltageMin.: 10 mV; max.: 253 VAC/DC
Switching currentMin.: 10 μA; max.: 5 A AC, 1 A DC
Breaking capacityMax.: 1250 VA, 50 W
Contact material (relay contacts)AgCdO and Au plated
Modes (adjustable)Min. / max.
Delay timeWhen immersed: approx. 0.5 s; when uncovered: approx. 1 s
Transistor output
Transistor outputFloating transistor output, overload and permanently shortcircuit proof
Transistor outputTransistor output
Load currentMax. 400 mA
Voltage lossMax. 1 V
Turn-on voltageMax. 55 VDC
Blocking current<10 μA
Modes (adjustable)Min. / max.
Delay timeWhen immersed: approx. 0.5 s; when uncovered: approx. 1 s
Contactless electronic switch
Contactless electronic switchContactless electronic switch
Modes (adjustable)Min. / max.
Delay timeWhen immersed: approx. 0.5 s; when uncovered: approx. 1 s
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Two-wire output
Two-wire output
Two-wire outputTwo-wire output
Suitable signal conditioning instruments SU 501
Output signal
Min. modeVibrating element uncovered: 16 mA ±1 mA; vibrating element covered:
8mA±1mA
Max. modeVibrating element uncovered: 8 mA ±1 mA; vibrating element covered:
16 mA ±1mA
Fault signal<2 mA
Modes (adjustable)Min. / max. (changeover with the signal conditioning instrument)
Delay timeWhen immersed: approx. 0.5 s; when uncovered: approx. 1 s
NAMUR output
NAMUR outputTwo-wire NAMUR output
NAMUR outputNAMUR output
Current consumption
Falling characteristics≥2.2 mA uncovered / ≤1 mA covered
Rising characteristics≤1 mA uncovered / ≥2.2 mA covered
Fault signal≤1 mA
Necessary processing systemNAMUR processing system according to IEC 60947-5-6
(EN 50227/DIN 19234)
Modes (NAMUR output adjustable to
falling or rising characteristics)
Min.: rising characteristics (High current when immersed); max.: falling
characteristics (Low current when immersed)
Approvals
ATEXATEX II 1G, 1/2G, 2G EEx ia IIC T6 1
ATEX II 1/2G, 2G EEx d IIC T6 2
ATEX II 1/2D IP6X T
Ship approvalGL & LR
WHGGerman Federal Water Act 3
Protection categoryIP 66/IP 67
Overvoltage categoryIII
Protection class
Protection class
Protection classProtection class
Transistor output, two-wire output,
NAMUR output
Relay output, contactless electronic
switch
CE conformity
CE conformity
CE conformityCE conformity
EMC (89/336/EEC)Emission EN 61326/A1: 1998 (class B), susceptibility EN 61326: 1997/A1:
LVD (73/23/EEC)EN 61010-1: 1993
SIL conformityOPTISWITCH fulfills the requirements of functional safety according to
1 this approval is for 2-wire and NAMUR electronics. It can be combined with either WHG or with ship approval.
2 only for the plastic-coated aluminium housing with a ½ NPT cable gland. An optional temperature adapter can be used without a gas-
tight bushing.
3 only for contactless electronic switch, relay and transistor electronics.
OPTISWITCH 4000 - Hygienic version:
From left to right: Tri-Clamp (valve plug DIN 43650); Bolting (valve plug DIN 43650);
SMS 1145 (valve plug DIN 43650)
1 Switching point
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DImensions in mm
abcL
[mm]
Tri-Clamp (valve plug DIN 43650)101.013.040.0L 1
Bolting (valve plug DIN 43650)115.0--L 1
SMS 1145 (valve plug DIN 43650)105.0--L 1
1 53 mm
Dimensions in inches
abcL
[inches]
Tri-Clamp (valve plug DIN 43650)3.980.511.57L 1
Bolting (valve plug DIN 43650)3.53--L 1
SMS 1145 (valve plug DIN 43650)4.13--L 1
OPTISWITCH 4000 - High temperature version:
From left to right: thread (M12x1, valve plug DIN 43650 and valve plug DIN 43650 with IDC
method of termination)
1 M12x1
2 Thread G¾ A, G1 A, ¾ NPT, 1 NPT
3 Switching point
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Dimensions in mm
abcdefghL
[mm]
Thread G¾ A, G1 A, ¾ NPT or
1NPT (M12x1)
Thread G¾ A, G1 A, ¾ NPT or
1 NPT (valve plug DIN 43650)
Thread G¾ A, G1 A, ¾ NPT or
1 NPT (valve plug DIN 43650 with
IDC method of termination)
1 with G¾ A, ¾ NPT: 66 mm; with G1 A, 1 NPT: 69 mm
162.510.0WS 32--21.313.040.0L 1
188.035.0-27.036.0----
182.042.0-28.042.0----
Dimensions in inches
abcdefghL
Thread G¾ A, G1 A, ¾ NPT or
1NPT (M12x1)
Thread G¾ A, G1 A, ¾ NPT or
1 NPT (valve plug DIN 43650)
Thread G¾ A, G1 A, ¾ NPT or
1 NPT (valve plug DIN 43650 with
IDC method of termination)
SingaporeSingapore
Tokyo Keiso - KROHNE (Singapore)
Pte. Ltd.
14, International Bus iness Park,
Jurong East
Chiyoda Building, #01-01/02
Singapore 609922
Phone: (65) 6567 4548
Fax : (65) 6567 9874
tks@tokyokeiso-krohne.com.sg
Republic of South Africa
Republic of South Africa
Republic of South AfricaRepublic of South Africa
KROHNE Pty. Ltd.
Bushbock Close
Corporate Park South
Midrand, Gauteng
P.O. Box 2069
Midrand, 1685
Tel.: +27 (0)11 314 1391
Fax: +27 (0)11 314 1681
midrand@krohne.co.za
Spain
Spain
SpainSpain
I.I. KROHNE IBERIA, S.r.l.
Poligono Indust rial Nilo
Calle Brasil, nº. 5
28806 Alcalá de Henares Madrid
Phone: +34 (0)91 883 2152
Fax: +34 (0)91 883 4854
krohne@krohne.es
USA
USA
USAUSA
KROHNE, Inc.
7 Dearborn Road
Peabody, MA 01960
Phone: +1 (800) FLOWING
Phone: +1 (978) 535 6060 (in MA)
info@krohne.com
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