Humidity indicators for moisture-sensitive electronic, electro-optic equipment, and humidity-controlled enclosures that require EMC shielding. Detect changes in humidity by using a colour-changing indicator paper that turns from blue to pink when humidity increases and reverts to blue when humidity decreases.

The humidity indicators can also be fitted with a desiccant cartridge or static desiccator filled with silica gel or molecular sieves to adsorb moisture that may enter the equipment during usage.

  • Distinctive colour change indication​
  • Reversible and nonreversible colour-change option
  • Available in plastic or metal housings
  • Clear window to observe and monitor changes in humidity level
BLD3722 (RIHP3M) 

M20 thread 30/50% R.H. humidity indicator plug has spanner flats for easy installation. It is compatible with the BLD1397 static desiccator and features an alochromed thread for R.F. screening continuity. This unit accurately detects changes in humidity levels through its colour-changing indicator paper, turning pink when humidity increases and blue when it decreases.

BLD3723 (RIHP4M)

M20 thread humidity indicator plugs with a 15/30% R.H. range have spanner flats for easy installation. It is designed with a static desiccator such as the BLD1397 and incorporates an alochromed thread for R.F. screening continuity.

BLD3724 (RIHP6M) 

This M20 thread humidity indicator plug has a 30/50% R.H. range and is designed with spanner flats for easy installation into equipment. It is compatible with a static desiccator like the BLD1397 and features an alochromed thread for R.F. screening continuity.

BLD4857/01-04

This compact split-level brass indicator with an M8 thread features spanner flats for easy fitting into equipment. It can be supplied with R.F. screening options if necessary.

BLD5000/01-05 

A split-level Humidity Indicator with a 30/50% R.H. range and ¾” pipe thread, this plug is designed for easy installation into equipment such as panels or flexible barrier bags with the provided black nut. It also features spanner flats and natural threads for R.F. screening continuity as needed.

BLD11174

Black Anodised Aluminum Humidity Indicator Plug with ½” UNF Thread and 20-40% R.H. Range for R.F. Screening. This unit includes a glass window, alochromed thread for R.F. screening continuity, gasket, gasket retainer, and hex black nut. It can be installed through a 0.515-inch (13.1 mm) diameter hole and is available in single or multiple spot discs.

BLD8169

An M25 thread split-level stainless steel Humidity Indicator Plug with a 15/30% R.H. range is designed to fit easily into equipment with its spanner flats. This unit can be painted and supplied with different R.H. levels upon request. It also has an internal rear thread for easy combination with a static desiccator cartridge.

BLD9049

This four-level Humidity Indicator Plug is designed with a 7/16 x 18 UNEF thread and offers a range of 20, 30, 40 & 50% R.H. levels. It is easy to panel-mount with the included black nut assembly and features alochromed threads for R.F. screening continuity.

BLD9398

This split-level Humidity Indicator Plug with a ¾” U.N. thread and 15/30% R.H. range is designed for easy installation using a square drive. Despite its small size, it provides reliable humidity monitoring and can be supplied with R.F. screening options when required.