EE355
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
simplied by the compact design and the exceptionally robust
stainless steel housing.
With an optional Modbus to USB converter and the free EE-
PCS conguration 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
v2.0 / Modification rights reserved
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 certicate 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