E+E EE355 Specifications

EE355

80

-20

-40

-60

The compact EE355 Dew Point Transmitter with a measuring
range down to -60 °C Td is ideal for applications in compressed
air systems, plastic dryers and industrial drying processes. An
integrated auto-calibration procedure permits a measurement
accuracy of <2 °C Td.

The measured values for dew point, frost point or ppm volume
concentration are available on an analog 4-20 mA and a digital
Modbus RTU output. Integration into the measurement task is

simplied by the compact design and the exceptionally robust

stainless steel housing.

With an optional Modbus to USB converter and the free EE-

PCS conguration software the user can adjust the transmitter,

set the Modbus parameters, and change the scaling of the
analog output.

Technical Data

Measuring values

Dew point (Td)

Measurement range -60...60 °C Td (-76...140 °F Td)
Accuracy

1)

OEM Dew Point Transmitter

EE355

60

40

20

0

-40

Accuracy: ≤ ±2°C Td

Dew point temperature (°C)

-10

-30

-20

Medium temperature (°C)

down to -60 °C Td

20 30

10

0

50 60

40

Response time t90 < 5 min -20 °C Td ( -4 °F Td) → -60 °C Td ( -76 °F Td)
< 15 sec -60 °C Td ( -76 °F Td) → -20 °C Td ( -4 °F Td)

Volume concentration (ppm)

Measurement range 20...200,000 ppm
Accuracy at 20 °C (68 °F) and 1013mbar ±(5 ppm + 9 % from measured value)

Output

Analog output (scalable) 4 - 20 mA (3-wire technology) RL < 500 Ohm

Maximum adjustable scaling -100...80 °C Td (-148...176 °F Td)

Resolution of analog output 2 µA

Digital interface MODBUS RTU (max. 32 units in one bus)

Temperature dependence ±5ppm of the measuring span / °C

(Deviating from 20 °C)

General

Supply voltage 18...28 V DC
Current consumption at 24V DC <20 mA + load current /
with autocalibration: 100 mA + load current
Pressure range of use 0...80 bar
Housing / protection class Stainless steel 1.4404 (AISI 316L) / IP65
Electrical connection
Sensor protection Stainless steel sintered filter
Temperature / humidity operating range -40...70 °C (-40...158 °F) / 0...100 % RH
Storage temperature range -40...60 °C
Electromagnetic compatibility EN61326-1 EN61326-2-3 Industrial environment
FCC Part 15 ICES-003 ClassB

1) The accuracy statement includes the uncertainty of the factory calibration with an enhancement factor k=2 (2-times standard deviation). The accuracy was calculated in

accordance with EA-4/02 and with regard to GUM (Guide to the Expression of Uncertainty in Measurement).

2) Field-attachable mating connector is included in the scope of supply.

2)

M12x1 5-pin plug

(-40...140 °F)

118

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EE355

EE355

Dimensions in mm (inch)

ISO

NPT

Ø12

34.5 (1.36)

(0.5)

G1/2“

140 (5.5)

AD27

77 (3)

92 ( 3.6)

89 (3.5)

Ø30

(1.2)

4

5

1 2

Connection Diagram

3

Plug

1...V+

2...Analog output 4-20mA

3...GND

4...RS485 A (=D+)

5...RS485 B (=D-)

1/2“NPT

AD22

74 (2.9)

Sampling Cell with Quick Connector

The sampling cell is specially developed for use in compressed air lines and has a quick-connector

suitable for standard compressed air connections (DN7.2). It allows for the cell to be tted and
removed without interrupting the process. The ow of gas can be adjusted using a bleed screw.

Pressure range: 0...10 bar (0...145 psi).

Ordering Information

Process connection

Software configuration

Physical parameter Dew point temperature Td [°C] no code
for analog output Frost point temperature Tf [°C]

Scaling of analog output scaling low -60 no code

Measured value unit for Modbus
RTU

G1/2" thread PA1
1/2“ NPT thread PA2

Dew point temperature Td [°F] MA53
Frost point temperature Tf [°F]
volume fraction of water vapor Wv [ppm] MA75

scaling high 60 no code

metric [°C] no code
non metric [°F] U2

1 = G 1/2“ or NPT
2 = Bleed screw
3 = Quick connector

(only with G 1/2“)

3

EE355-

for Td < 0 °C output is Tf

for Td < 32 °F output is Tf

value SALvalue

value SAHvalue

MA65

MA66

1

2

Scope of Supply Order example

- EE355 Transmitter according to Ordering Guide

- Mating plug M12x1 eld attachable

- Operation Manual - Quick guide

- Inspection certicate according to DIN EN10204 - 3.1

Pressure-tight screw connection: G1/2” thread
Output: Dew point Td [°C]
Output scaling: 4-20 mA = -60...20 °C Td
Measured value unit: metric [°C]

EE355-PA1SAH20

Accessories

M12x1 5pin connection cable socket/flying leads 1.5m HA010819 sampling cell G 1/2“ with quick connector HA050102
M12x1

5pin connection cable socket/flying leads 5m HA010820 sampling cell NPT with bleed screw only HA050107

M12x1

5pin connection cable socket/flying leads 10m HA010821 sampling cell G 1/2“ for atmospheric dew point HA050106

Modbus - USB converter for EE35x HA011013 basic sampling cell G 1/2“ HA050103

stainless steel sintered filter HA010103 basic sampling cell NPT HA050105

EE355

v2.0 / Modification rights reserved

119