Dry Pack Plugs | McMaster-Carr

	Minimum Dew Point Minimum Dew Point

-22° F

-30° C

	Maximum Indoor Temperature Maximum Indoor Temperature

60° C

140° F

	Scale Scale

Celsius

Fahrenheit

	Temperature Resolution Temperature Resolution

1° F

1° C

	For Hole Diameter For Hole Diameter

1.05"

1 27/64"

1.45"

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Dew Point Accuracy Dew Point Accuracy

±3.6° F

±2° C

	Maximum Dew Point Maximum Dew Point

20° C

68° F

	Environment Environment

Dusty

Submersible

	Minimum Indoor Temperature Minimum Indoor Temperature

-4° F

-20° C

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Humidity Points Humidity Points

	Width Width

1 3/8"

1 7/8"

	Thread Type Thread Type

NPSM

UNEF

	Indicator Style Indicator Style

Pie

Spot

	Specifications Met Specifications Met

7 Products

Through-Wall Humidity and Temperature Meters

Monitor relative humidity, temperature, and dew point inside sealed containers. These meters are rated IP67, so they won't expose contents to dust and water. The housing is aluminum, which is lightweight and resists corrosion.

For technical drawings and 3-D models, click on a part number.

Relative Humidity		Temperature		Dew Point
Range	Accuracy	Indoor Range	Accuracy	Range	Accuracy	Dp.	Dia.	For Hole Dia.	For Max. Wall Thick.	Batteries Included	Fasteners Included	Environmental Rating		Each
5 to 80%	±3%	-4° to 140° F/-20° to 60° C	±1° F/±0.5° C	-22° to 68° F/-30° to 20° C	±3.6° F/±2° C	1 1/4"	2 1/2"	1 27/64"	11/32"	Yes	Yes	IP67	0000000	0000000

Humidity-Indicating Plugs

Plug

40% Spot-Style Indicator

20%, 30%, 40% Pie-Style Indicator

20%, 30%, 40%, 50% Pie-Style Indicator

30%, 40%, 50%. 60% Pie-Style Indicator

20%, 30%, 40%, 50% Spot-Style Indicator

Monitor humidity in sealed containers without opening them, protecting the inside from contamination. These plugs are often used on plastic bags, storage containers, and electrical housings. Consisting of a mounting nut and two gaskets for a tight seal, these plugs install through a hole in a flexible barrier. Remove one gasket and reverse the nut to install plugs in a rigid container. Watch the indicator disc through the nut’s viewing window—it will change color as humidity rises and falls. Made of anodized aluminum, these plugs resist corrosion and are lightweight. They meet military and SAE standards for humidity indicators.

For technical drawings and 3-D models, click on a part number.

					Thread
Humidity Points	Accuracy	Height	Width	For Hole Diameter	Type	Size	Pipe Size	Indicator Use	Specifications Met		Each
Anodized Aluminum
Pie-Style Indicator
20%, 30%, 40%	±5%	5/8"	1 3/8"	1.05"	NPSM	__	3/4	Reversible	MIL-I-8835; SAE AS26860 Type 2	0000000	000000
20%, 30%, 40%, 50%	±5%	5/8"	1 3/8"	1.05"	NPSM	__	3/4	Reversible	MIL-I-8835; SAE AS26860 Type 2	0000000	00000
30%, 40%, 50%, 60%	±5%	5/8"	1 3/8"	1.05"	NPSM	__	3/4	Reversible	MIL-I-8835; SAE AS26860 Type 2	0000000	00000
Spot-Style Indicator
20%, 30%, 40%, 50%	±5%	5/8"	1 3/8"	1.05"	NPSM	__	3/4	Reversible	MIL-I-8835; SAE AS26860 Type 2	0000000	00000
20%, 30%, 40%, 50%	±5%	5/8"	1 7/8"	1.45"	UNEF	1 7/16"-18	__	Reversible	MIL-I-8835; SAE AS26860 Type 2	0000000	00000
40%	±5%	5/8"	1 3/8"	1.05"	NPSM	__	3/4	Reversible	MIL-I-8835; SAE AS26860 Type 2	0000000	00000