Siemens Building Technologies 186 Series Hygrostats Catalog Page
Pneumatics
Pneumatic Room and Duct Hygrostats
186 Series
Hygrostats
Description
The 186 Room and Duct Hygrostats are pneumatic
instruments sensitive to slight changes in relative humidity.
Features
• Adjustable sensitivity
• Sensitive hygroscopic membrane
• Includes temperature compensation
• Galvanized steel housing standard on duct model
• Models available for normal comfort range and high
limit range
• Room type comes complete with standard cover and
wall plate
• Duct type comes mounted inside a duct mounting box
186 Room Hygrostat.
186 Duct Hygrostat.
Applications
The 186 Room and Duct Hygrostats provide control of
relative humidity for comfort control in hospitals, schools
and ofce buildings.
Application Drawings
Room Application.
F-35
Duct Application.
Pneumatics
Pneumatic Room and Duct Hygrostats Specifications
F-36
Sensitivity ......................................................................1/4 to 4 psi/% RH
Normal Supply Pressure .................... 15 to 25 psi (103 kPa to 172 kPa)
Maximum Supply Pressure ............................................30 psi (207 mm)
Air Consumption ............................................................ 15 scim (4 ml/s)
Effect of 10°F Temperature Change ................................Shift of 1% RH
Effect of 5 psi Supply Pressure
Change (mid sensitivity) ................................................ 7.0 min./vol unit
Duct Box ................................................... Extends 6" (152 mm) into duct
Air Connections
Duct .......................................................... Barb tting for 1/4" (64 mm)
OD polyethylene tubing
Room ........................................... 5/32" (4 mm) OD polyethylene tubing
Dimensions
Chassis......................................................... 2.9" H x 1.75" W x 1.13" D
(73.66 mm W x 44.45 mm H x 28.70 mm D)
Room .......................................................................... 2.16" W x 3.34" H
(55 mm W x 85 mm H)
Duct ................................................................. 4.5" W x 5.88" H x 6" D
(114 mm x W 149 mm H x 152 mm D)
Standard Room Cover .............................................Desert Beige, plastic
Shipping Weights
186-0013 & 186-0019.................................................. 0.84 lb. (0.38 kg)
186-0087; 186-0088; 186-0090; 186-0091 ......................3.3 lb. (1.5 kg)
Pneumatic Room and Duct Hygrostats Product Ordering
Part No.
Direct
Description Control Range Type of Control
Room 20 to 90% RH Humidication/Dehumidication 186-0013 186-0019
Duct 20 to 90% RH Humidication/Dehumidication 186-0087 186-0088
Duct 55 to 95% RH High Limit — 186-0090
Duct 25 to 65% RH Room Comfort — 186-0091
Control Action
Reverse
Control Action
Accessories & Service Kits
F-87
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