ISO 6270 & ASTM D 2247 - Senze-Instruments

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Process & Quality Control

ISO 6270 & ASTM D 2247

Coatings & Industry > Corrosion + Ageing > Humidity chamber

Humidity Cabinet

HYGROTHERM 519-529

For humidity tests in accordance with international standards

  • DIN EN ISO 6270-2 CH
  • DIN EN ISO 6988
  • DIN 50 958
  • DIN 53 771
  • DIN 55 991
  • NFT 30-055
  • ISO 3231
  • ISO 4541
  • ISO 11 503
  • ASTM D 2247

This practice covers the basic principles and operating procedures for testing water resistance of coatings by exposing coated specimens in an atmosphere maintained at 100 % relative humidity so that condensation forms on the test specimens.
This practice uses the technique of creating a slight temperature differential within the exposure area to form condensation on the coated specimens. As the warmer saturated air passes the cooler specimens, water is deposited onto the specimens in the form of condensation.
This practice places the entire specimen in the exposure area allowing condensation to form on all surfaces. This makes this practice suitable for flat panels as well as large or 3D objects. This practice differs from other methods where condensation is only formed on the front coating surface, but the back surface is outside the exposure area.


According with DIN EN ISO 6270-2, the condensation-water test atmospheres are designated as follows:
  • Test atmosphere CH Condensation atmosphere with constant humidity
  • AHT Condensation atmosphere with alternating humidity and air temperature
  • AT Condensation atmosphere with alternating air temperature
HYGROTHERM 519 - 300 L

Purpose and Application
Corrosion protection systems and materials are tested in the humidity cabinet HYGROTHERM 519 in accordance with international standards and specifications. Examples are the reaction of protection-treaded carrier media in the condensed water climate (constant humidity climates CH in accordance with DIN EN ISO 6270-2).

The humidity cabinet HYGROTHERM 519 corresponds to the latest standards of technology. Setting-up and monitoring functions are kept to a minimum, or are undertaken automatically.

The 300 l standardised test chamber made of acidproof and thermoresistant plastic material ensures that the HYGROTHERM 519 is ideally suited to large-scale batch testing. The large, transparent access door allows easy mounting of specimens, which are hung from seven free-standing cross rails, to be exposed over a certain period aggressive climates or media.

The temperature is set on an electronic temperature regulator and the set value and actual value are shown on LED displays. According to the standards the test temperatures are between 20°C and 40°C (max. temperature 50°C).
HYGROTHERM 519 SA 300 L
Purpose and Application
The HYGROTHERM; Model 519 SA, is intended exclusively for testing the reaction of corrosion protection systems to condensation exposure for condensation water and constant humidity climates (CH) in accordance with DIN EN ISO 6270-2 and the reaction of industrial finishes to sulphur dioxide containing atmospheres.
The identically constructed, expanded humidity cabinet HYGROTHERM 519 SA is equipped with a semi-automatic control system and operates time-independent and especially economically.
The operations which need to be undertaken after an 8-hour cycle, such as acid draining, evacuation and replacement of air and the control of the heating system are executed automatically.

For the tests in sulfur dioxide atmosphere, an electronic gas dosing unit is available optionally. The quantity of gas required for corrosion purposes can therefore be easily and accurately adjusted.
A special venting connection also prevents the leakage of SO2, which is a well-known and particularly burdensome phenomena.
The electronic gas dosing unit works with a data storage via an included terminal program (RS 232- or USB port); calibrated dosing range 0.2 dm3 and2.0 dm3 SO2 at 20°C and 1013 hPa ( accuracy: +/-3% max. relative error).
HYGROTHERM 519 FA 300 L

Purpose and Application
The HYGROTHERM; Model 519 FA, is intended exclusively for testing the reaction of corrosion protection systems to condensation exposure for condensation water and constant humidity climates (CH) in accordance with DIN EN ISO 6270-2 and the reaction of industrial finishes to sulphur dioxide containing atmospheres (DIN EN ISO 6988).

In execution like Model 519 SA, the version HYGROTHERM 519 FA is additionally equipped with a PLC (programmable logic control) using for the fully automatic sequence, i. e. the control of heating, acid feeding and draining, filling of the bottom trough with water as well as draining, refilling of the trough water tank, and evacuation and replacement of air.
(By evacuation and replacement of air a manual operation is also possible.)

An electronic gas dosing unit for tests in sulfur dioxide atmosphere is included in the scope of supply of Model 519 FA.
Gas dosing unit with remote controller

The electronic gas dosing unit works with a data storage via an included terminal program (RS 232- or USB port); calibrated dosing range 0.2 dm3 and2.0 dm3 SO2 at 20°C and 1013 hPa ( accuracy: +/-3% max. relative error).

The electronic gas dosing unit can be operatred via a remote control (with USB interface for connection to a PC.

HYGROTHERM 529
Purpose and Application
Corrosion protection systems and materials are tested in the humidity cabinet HYGROTHERM 529 (as described under Model 519) in accordance with international standards and specifications. Examples are the reaction of protection-treaded carrier media in the condensed water climate (constant humidity climates CH in accordance with DIN EN ISO 6270-2).

As an alternative to the model 519 with 300 l test volume the HYGROTHERM 529 is available for the testing of large-volume functional parts in the condensation-water climate (without addition of gas) with a test chamber volume of 1000 liters or 2000 liters.

The instrument consits of a control unit (incl. test duration counter and temperature regulator) for wall mounting as well as a separate double-walled test chamber in rectangular design with pneumatically dome opening
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