Product Overview

This 3-spot humidity indicator (30%-50%-70% RH) is a precision visual humidity monitoring device, designed to be mounted on the outer wall of sealed containers without opening the enclosure. It adopts aluminum alloy housing with a large transparent viewing window, enabling direct, accurate reading of the internal relative humidity level inside sealed equipment, housings, and aerospace/military enclosures.

It complies with strict military packaging specifications, features anti-leakage, anti-vibration, and impact-resistant structure, and is widely applied in high-reliability scenarios such as military instruments, aerospace systems, hydraulic equipment, electronic devices, and precision transportation containers.

Core Product Specifications (Table, Strictly Extracted From Your Drawing & Details)

Item	Specification
Product Name	3-Spot Silver Humidity Indicator
Model	WY-HIP2345Y
Humidity Indication Range	30% - 50% - 70% RH (3-point indication)
Mounting Diameter	1.05 in (26.7 mm)
Window Inner Diameter	0.67 in (17.2 mm)
Pressure Rating	10 psi
Thread Size	3/4 - 14 Straight Pipe
Recommended Installation Torque	30 – 40 in.-lbs. (3.4 – 4.5 N·m)
Maximum Mounting Wall Thickness	0.23 in. (6 mm)
Main Body Material	Brass, Zinc Plated
Internal O-Ring Material	IAW MIL-PRF-6855
External Gasket Material	IAW MIL-PRF-6855
Housing Material	Silver Aluminum Alloy
Working Temperature	-20℃ ~ 80℃
Accuracy	≤±5% RH (at 24℃ testing environment)
Compliance Standard	MIL-STD-2073-1 Method 50, AS26860
Protection	Leak-proof, Shockproof, Vibration Resistant
Customization	Humidity indication range can be customized

Product Description & Function

Purpose

The humidity indicator provides real-time visual indication of the relative humidity inside sealed containers, enclosures, and equipment without opening the sealed space. It delivers clear, direct humidity readings through the surface window, ensuring timely monitoring of environmental humidity to protect precision instruments, electronic components, and military/aerospace devices from moisture damage.

Performance & Accuracy

The indicator is calibrated for high precision, with a measurement error ≤ 5% RH under standard 24℃ test conditions. It delivers stable and consistent readings in long-term deployment, suitable for permanent installation on moisture-proof tanks, plastic/fiber housings, military equipment, electrical assemblies, and other sealed humidity-controlled spaces.

Structural & Reliability Design

With robust aluminum alloy construction and military-grade sealing components, the indicator features a reinforced plug-in design that prevents gas/liquid leakage and withstands mechanical shock and continuous vibration. The transparent window is scratch-resistant and weather-resistant, maintaining clear visibility in harsh operating environments.

Storage & Handling Instructions

1.Store the humidity indicator in its original sealed container before installation and preparation for use.
2.The indicator card contains water-soluble materials; avoid direct contact with water, steam, or ammonia, as these substances will cause permanent damage to the indicating function.
3.Install in a well-ventilated, non-corrosive environment to ensure long service life and reading stability.

Application Scenarios (Aerospace & Military Grade)

This 3-spot humidity indicator is engineered for high-end, high-reliability industrial and defense applications, including:

Military Instruments & Night Vision Devices
Aerospace Systems & Avionics Equipment
Hydraulic Systems & Radar Equipment
Precision Transportation & Shipping Containers
Military-Grade Electronic Equipment & Assemblies
Metal Industry & Precision Sealed Equipment
Weapon Systems, Shipboard Instruments, and Aerospace Sealed Cabinets

Quality & Certification

Our humidity indicators are manufactured under strict quality management systems and certified to international and military standards. Compliant with MIL-STD-2073-1 Method 50 and AS26860 military packaging specifications, the product has passed authoritative testing and obtained quality system certifications including CNAS, IAF, and international ISO quality management certification, ensuring stable performance, consistent quality, and full traceability for global B-end customers.