Testo 6682 Data sheet

testo 6682

Committing to the future

Efficient humidity measurement specially for Ex applications in accordance
with ATEX II 2 (1) G Ex ia [ia] IIC T4 as well ATEX II 1/2 G Ex ia IIC T4/T3

NEW!

Humidity Transmitter for Explosive Areas

2

Your benefits with the testo 6682 humidity transmitter

The new testo 6682 humidity transmitter for Ex applications meets the most
stringent requirements for process monitoring in explosive applications for
pharmaceutical, chemical and process engineering.

Process safety and system availability are supported by the excellent features of
teso 6682 which enthuse those working in the field:

• Highest accuracy and long-term stability of ±1% RH

• Preventive maintenance through self-monitoring and early warning

• Historical traceability thanks to internal log

• Flexible calibration concept

• Replaceable digital testo 6616 probe

• Display and operating menu for easy operation with parameterization,
adjustment and analysis

Testo’s humidity sensor: The core piece of high quality humidity transmitters
now also for Ex areas

Testo is the first choice when it comes to superior humidity transmitters for a
critical climate and drying processes. Using our many years of experience, the
sensor concept and signal processing have now been completely overhauled.

Accuracy and long-term stability were tested as part of 5 years of interlaboratory
tests by different national calibration laboratories (PTB, CETIAT, NIST etc.). Even
without a new adjustment, the ± 1% RH limit was not exceeded.

You are on the safe side thanks to the accuracy, stability and efficiency of the
Testo humidity transmitter.

Top electrode

Bottom electrode

Substrate

Connections

Dielectric layer

Polymer, changes
permittivity continuously as
a function of relative
humidity

Allows humidity to
penetrate to the
dielectric layer and
protects against dirt

Ceramic substrate for
mechanical protection

Special anti-

corrosion design

II Instrument group: Use in non-firedamp endangered areas

1/2 Instrument category: Application range Electronics Category 2,

Application range Probe shaft Category 1

2 (1) Instrument category: Instrument can be used in Category 2 and facilitates

the connection of instruments which can be used in Category 1

G Media: For explosive mixtures of air and combustible gases, vapours or

mist

Ex Explosion-proof electrical equipment in accordance with European

standards

ia Ignition protection type: Intrinsic safety

[ia] [ia] The instrument provides an intrinsic electric circuit for an additional

instrument

IIC The instrument can be used for gases in the IIC gas group

T4/T3 Temperature class T4 or T3

Ex pprotection cclasses
The testo 6682 humidity transmitter is intended
for protection class

ATEX III 22 ((1) GG EEx iia [[ia] IIIC

T4

, the digital testo 6616 humidity probe for protection

class

ATEX III 11/2 GG EEx iia IIIC TT4/T3

.
The sensor tip can be used in a Zone 0 explosive area,
the transmitter in Zone 1.
Basic safety and health requirements are fulfilled by
compliance with EN 60079-0:2006, EN 60079-11:2007
as well as EN606079-26:2007 for testo 6616.

A

A
Explosive area, Zone 0

B
Explosive area, Zone 1

C
Non-explosive area

B

C