E+E EE260 Specifications

EE260

Heated Humidity and Temperature Probe

for Meteorological Applications

The EE260 probe is optimized for accurate and reliable relative humidity
(RH) and temperature (T) measurement in meteorology and demanding
outdoor applications.

Innovative, Compact Design

The design of the EE260 integrates a heated humidity sensing head and an
additional T sensing element into one single compact probe. The device is
thus compatible with rotation symmetric radiation shields.

Measurement Performance

The dual heating system prevents condensation on the RH sensing element,

on the probe head and on the lter cap, which leads to very short response

time and fast recovery after condensation. Furthermore, it enables precise
RH measurement even under continuously high humidity and condensing
conditions.

Versatility

Besides the measurement of RH and T, the EE260 calculates other humidity
related quantities like dew point temperature (Td), absolute humidity (dv) and
mixing ratio (r).

Reliability, IP67 Protection Class

The proprietary E+E coating protects the RH sensing element and its leads
against corrosive and electrically conductive pollution. The encapsulated

electronics are optimally protected against environmental inuences.

Analogue Outputs and Digital Interface

The EE260 features two freely congurable and scalable voltage outputs as

well as an RS485 interface with Modbus RTU protocol. The measured data is
available at the analogue and digital interfaces simultaneously.

User Congurable and Adjustable

An optional conguration adapter and the free EE-PCS Product Conguration Software facilitate the conguration and

adjustment of the EE260.

EE260 with radiation shield

Features

Measurands

» Relative humidity (RH)
» Temperature (T)
» Dew point temperature (Td)
» Frost point temperature (Tf)
» Wet bulb temperature (Tw)
» Water vapour partial pressure (e)
» Mixing ratio (r)
» Absolute humidity (dv)
» Specic enthalpy (h)

Electronics

» Fully encapsulated
» Two voltage outputs
» RS485 interface with

Modbus RTU protocol

» User congurable and adjustable

Enclosure

» IP67
» Flexible thermoplastic elastomer
» UV resistant and T stable
» M12x1 connector, 8 poles, stainless steel

RH and T sensing element

» Heated
» Protected by

- E+E proprietary coating

- PTFE membrane lter

on stainless steel body

Heated probe head

Unique probe design
with integrated T sensor

Inspection certicate
according DIN EN 10204-3.1

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EE260

Protective Sensor Coating

The E+E proprietary sensor coating is a hygroscopic layer applied to the sensing elements, their leads and soldering

points. The coating substantially extends sensor life-time and ensures optimal measurement performance in corrosive
environments (salts, o󰀨-shore applications). Additionally, it improves the long term stability of E+E sensors in dusty, dirty

or oily applications by preventing stray impedance caused by deposits on the active sensor surface or on the electrical
connections.

Technical Data

Measurands
Relative humidity

Measuring range 0…100 % RH

Sensing element E+E HMC01, heated

Response time t
Accuracy

1)

-15...40 °C

-15...40 °C (5…104 °F) for RH > 90 % ± 2.0 % RH

-25...60 °C

-40...-25 °C

Temperature

Measuring range -60...60 °C
Temperature sensor Pt100 1/3 DIN B

Accuracy

Outputs

2)

Analogue 0 - 1 V / 0 - 2.5 V / 0 - 5 V / 0 - 10 V

Freely selectable and scalable 0 < I
Digital interface RS485 (EE260 = 1 unit load)
Protocol Modbus RTU
Default settings Baud rate 9

General

Supply voltage 7 - 30 V DC
Power consumption, typ. 300 mW (25 mA @ 12 V DC, heating included)

Electrical connection M12x1, 8 poles, stainless steel 1.4404

Filter PTFE membrane, stainless steel body
Protection class IP67

Enclosure material Thermoplastic elastomer, UV resistant and T stable
Electromagnetic compatibility

Operating and -60...60 °C

storage conditions 0...100 % RH (operation)

0...95 % RH non-condensing (storage)

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) The EE260 simultaneously features two analogue voltage outputs and the RS485 interface.

3) Supported baud rates: 9 600, 19 200, 38 400, 57 600, 76 800 and 115 200; find more details about communication setting in the User Manual and the Modbus
Application Note at www.epluse.com/ee260

4) Compliance with EN61000-4-3 and EN 610004-6: Electromagnetic interferencees may cause additional deviations <2 % RH.

at 20 °C (68 °F) < 15 s

90

(incl. hysteresis, non-linearity and repeatability)

(5…104 °F) for RH ≤ 90 % ± (1.3 + 0.3 % *mv) % RH mv = measured value

(-13…140 °F) ± (1.4 + 1 % *mv) % RH

(-40…-13 °F) ± (1.5 + 1.5 % *mv) % RH

(-76...140 °F)

0.6

0.5

0.45

0.4

0.3

0.2

0.15

0.1

0

-60 -50 -10-20-30-40 100 605020 30 40

Analogue output

4)

EN 61326-1 EN 61326-2-3

0.4

0.3

0.2

0.1

< 1 mA

L

(-76...140 °F)

0

-60 -50 -10-20-30-40 100 605020 30 40

3)

600

, parity even, stop bits 1, slave ID 235

RS485 interface

EE260

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