Georg Fischer 2281 Specifications

FM

APPROVED

C

US

2281 Multipoint Switch

Features

• Easy on site probe length configuration

• Fast installation due to 2 to 4 individual switching
points integrated in one sensor

• Up to 4 relays for pump and valve control

• Adjustable sensitivity

• Adjustable delay time

The Multipoint Switch is based on the conductivity
principle and can be applied to liquids with conductivity
higher than 10 μS/cm.

The probes have to be placed into the tank for level
detection. The probe length should be in accordance
with the level to be detected. Filling liquid in the tank will
change the electrical conductivity between the reference
probe and the outer probes. The established connection
will be converted and activate a relay providing the
output.

Applications

• Potable Water

• Cooling Water

• Chemicals

• Pump Control

www.gfps.com/level

Dimensions

89 mm (3.5 in)

121 mm (4.76 in)

64 mm (2.52 in.)

35 mm (1.38 in.)

16 mm (0.63 in.)

17,6

mm

(0.69 in.)

14

mm

(0.55 in.)

65 mm (2.56 in.)

52 mm (2.05 in.)

M20x1,5

1½” BSP

M6

121 mm (4.76 in)80 mm

(1.3 in)

33 mm

(3.15 in)

Multiprobe sockets:
2281-S-BT-2; 2 electrodes
2281-S-BT-3; 3 electrodes

35 mm

90 mm (3.54 in.)

67,5 mm (2.66 in.)

45 mm (1.77 in.)

3,4

mm (0.13 in.)

(1.38 in.)

Conductive Level Control
Switch Type 2281-1-Relay;
1 SPDT Relay

90 mm (3.54 in.)

67,5 mm (2.66 in.)

45 mm (1.77 in.)

19 mm

21 mm

(0.83 in.)

(0.75 in.)

56,5 mm (2.22 in.)

Conductive Level Control
Switch Type 2281-2-Relay;
2 SPDT Relay

2281-S-BT-4; 4 electrodes

Specifications

General

Type 2281-Y-YY-Y 2281-1-Relay 2281-2-Relay

Probes 2, 3, 4

Environmental

Process Temperature max. +80 °C (176 °F)

Ambient Temperature -20 °C…+50 °C (-4 °F…+122 °F)

Process Pressure (absolute) 0.1 MPa (1 bar) 14.5 psi

Enclosure

Enclosure Material PBT

Process connection material PP

Probe socket material Stainless Steel 1.4571

Ingress protection IP65, NEMA 4 IP20, NEMA 1

Process Connection 1½ in.

Probes

Material Stainless Steel 1.4571

Standards Lengths Available 0.5 m (19.69 in.), 1.0 m

(39.37 in.), 1.5 m (59.06 in.)

(72 in., 108 in. on request)

Please contact GF for special lengths up to 3 m

Probe separator

Material PP

Electrical

Probe Voltage 3.5 V AC 5 V AC

Probe Current < 0.2 mA AC < 1mA AC

Response max. 400 ms

Delay Adjustable: 0.5…10 s

Relay Output 1x SPDT 2x SPDT

Switching Voltage 250 V AC1, 24 V DC

Switching Current 8 A AC1 16 A AC1

Switching Power 2500 VA AC1, 240 W DC 4000 VA AC1, 384 W DC

Power Supply 24 V…240 V AC / DC 24 V AC / DC

Mechanical Connection DIN EN 60715 rail

Electrical Connection Class II Class III

Standards and Approvals

General Approvals CE, RoHS

www.gfsignet.com