Mode of operation

Measuring principle

Inverse frequency shift capacitive level detection

Input

Measured variable

Change in picoFarad (pF)

Output

Output signal

• Relay output

1 SPDT Form C relay

• Max. contact voltage

• 30 V DC
• 250 V AC

• Max. contact current

• 5 A (DC)
• 8 A (AC)

• Max. switching capacity

• 150 W (DC)
• 2 000 VA (AC)

• Time delay (ON and/or OFF)

1 ... 60 s

• Solid-state output

• Output

Galvanically isolated

• Protection

Against reversed polarity (bipolar)

• Max. switching voltage

• 30 V (DC)
• 30 V peak (AC)

• Max. load current

82 mA

• Voltage drop

< 1 V, typical at 50 mA

• Time delay (pre or post switching)

1 ... 60 s

Accuracy

Resolution

• Min. sensitivity (pF)

1 % change in actual capacitance

• Max. temperature error

0.2 % of actual capacitance value

Rated operating conditions¹⁾

Installation conditions

• Location

Indoor/outdoor

Ambient conditions

• Ambient temperature

-40 ... +85 °C (-40 ... +185 °F)²⁾

Medium conditions

Liquids, bulk solids, slurries and interfaces, and applications with viscous materials

• Relative dielectric constant ?_r

Min. 1.5

• Process temperature

• Rod/Cable version

-40 ... +200 °C (-40 ... +392 °F)²⁾

• High-temperature version

-40 ... +400 °C (-40 ... +752 °F)

• Process pressure³⁾

-1 ... +35 bar g
(-14.6 ... +511 psi g)

Design

Material (enclosure)

Powder-coated aluminum with gasket

Degree of Protection

Standard: Type 4/NEMA 4/IP65
Optional: Type 4/NEMA 4/IP68

Cable inlet

2 x M20 x 1.5 thread (option: 2 x ?" NPT conduit entry including 1 plugged entry)

Controls and displays

Displays

3 LEDs, for probe status, output status and power supply

Potentiometers

2 potentiometers for time delay and sensitivity

Switches

5 DIP switches for delay on/off, fail-safe high/low, time delay test/adjust, high/low sensitivity, test delay settings

Power supply

Supply

12 ... 250 V AC/DC, 0 ... 60 Hz, galvanically isolated, 2 W

Certificates and approvals

General Purpose

CSA, FM, CE, RCM

Flameproof Enclosure with IS Probe

ATEX II 1/2 G EEx d[ia] IIC T6 ... T1
ATEX II 1/2 D T100 °C

Dust Ignition Proof with IS Probe

ATEX II 1/2 D T100 °C
CSA/FM Class II, Div. 1,
Groups E, F, G
CSA/FM Class III T4

Explosion Proof Enclosure with IS Probe

CSA/FM Class I, Div. 1,
Groups A, B, C, D
CSA/FM Class II, Div. 1,
Groups E, F, G
CSA/FM Class III T4

Marine

Lloyds Register of Shipping, Categories ENV1, ENV2, and ENV5

Overfill Protection

WHG (Germany)
VLAREM II (Belgium)

Others

Pattern Approval (China)

Rod version

High Temperature version

Cable version

Length

Min. 250 mm (9.8 inch),
max. 1 000 mm (40 inch)

Min. 250 mm (9.8 inch),
max. 1 000 mm (40 inch)

Min. 1 000 mm (40 inch),
max. 25 000 mm (984 inch)

Sensor wetted parts

PFA (no insulation on active probe), 316L stainless steel, PEEK isolators

Ceramic (ZrO₂¹⁾) isolators (no insulation on active probe), 316L stainless steel

316 stainless steel, optional PFA, PEEK isolators

O-ring seal material

FKM (optional FFKM)²⁾

Graphite²⁾

FKM (optional FFKM)²⁾

Thermal isolator

Optional

Standard

Optional

Extension

User selectable length

User selectable length

User selectable cable length