Product Overview

The Military Standard Dust Test Chamber is a specialized environmental testing system designed to evaluate the durability of equipment exposed to blowing sand and dust conditions. According to MIL-STD-810H Method 510.7, dust is defined as particulates smaller than 150 μm in diameter, while sand ranges from 150 μm to 850 μm. This chamber strictly follows Procedure II – Blowing Sand, which tests a material's resistance to abrasion (erosion) and clogging caused by sharp-edged particles. The Military Standard Dust Test Chamber is applicable to all mechanical, optical, electrical, electronic, electrochemical, and electromechanical devices – including platform-mounted and man-portable systems – that are likely to be exposed to blowing dust-laden atmospheres. With a massive workroom(customized dimension) , this chamber can accommodate large test specimens such as automotive components, military electronics, and aerospace subsystems.

Product Features

The Military Standard Dust Test Chamber incorporates advanced engineering to deliver precise, repeatable test conditions:

High-capacity test section – Workroom dimensions 2600 mm (W) × 2600 mm (D) × 2200 mm (H); equipment footprint 6000 mm × 6000 mm.
Powerful circulation fan – Multi-blade high-pressure centrifugal fan with belt drive; frequency converter for variable air velocity (18–29 m/s).
Automatic feeding system – Feeds sand/dust at controlled concentrations (0.18±0.2, 1.1±0.3, 2.2±0.5 g/m³).
Rotating turntable – Stainless steel SUS304 table ≥Φ1600 mm, 360° rotation, speed ≤10 rpm, load capacity ≥200 kg. Programmable forward/reverse and angle positioning.
Dehumidification & cooling device – Refrigeration unit cools circulating air and reduces humidity below 30% RH during testing.
Heating device – Sheathed electric heating tubes at the air inlet end for temperature control (ambient to 30 °C, deviation ±2 °C, fluctuation ≤1 °C).
Sand/dust exhaust system – Cartridge filter extracts air and removes residual dust; heavy-duty vacuum cleaner available for manual cleaning.
Electrical control system – 7″ Weintek touch screen, PLC with PID temperature control, PWM heat/cool balance; SD card data storage, USB export, RJ45 remote monitoring.
Safety protections – Motor overload, phase loss, leakage, over-temperature, humidity/velocity/concentration alarms, compressor over-temp, door limit switch.

Test Standards

This Military Standard Dust Test Chamber is specifically designed to comply with MIL-STD-810H, Method 510.7 – Procedure II (Blowing Sand). Procedure II investigates the susceptibility of materiel to blowing sand with particle sizes from 150 μm to 850 μm. The test evaluates performance degradation, effectiveness, reliability, and maintainability due to abrasion or clogging. The chamber can also support other dust test standards such as IEC 60529 (IP5X/IP6X) and GB/T 2423.37, but its primary certification target is MIL-STD-810H. All technical parameters – including air velocity, sand concentration, temperature, and humidity – are calibrated to meet or exceed the standard's requirements.

Technical Parameters

Below are the key technical specifications of the Military Standard Dust Test Chamber :

Parameter	Specification
Workroom dimensions (W×D×H)	customized dimension
Temperature range	Ambient to +30 °C
Temperature deviation	±2 °C
Temperature fluctuation	≤1 °C
Relative humidity	<30% RH
Air velocity (blowing sand)	18 – 29 m/s
Sand concentration options	0.18±0.2, 1.1±0.3, 2.2±0.5 g/m³
Turntable diameter	≥Φ1600 mm
Turntable load capacity	≥200 kg
Turntable rotation speed	≤10 rpm (programmable)
Power supply	AC 380 V ±10%, 50 Hz, 3-phase 4-wire + PE
Cooling water	≤30 °C, 0.3–0.45 MPa
Compressed air	0.4–0.7 MPa, dry & oil-free

FAQ

Q1: What types of devices can be tested in this chamber?

A: Any mechanical, optical, electrical, electronic, electrochemical, or electromechanical device that may be exposed to blowing sand – including vehicle lamps, meters, steering systems, military electronics, drones, and portable communication equipment.

Q2: How is the sand concentration controlled automatically?

A: The automatic feeding device doses sand/dust into the air stream; a wearresistant sand/dust concentration sensor provides realtime feedback, and the controller adjusts the feeder's step pulse to maintain the setpoint.

Q3: Does the chamber support both dust (≤150 μm) and sand (150–850 μm) tests?

A: Yes. Although Procedure II focuses on blowing sand, the same Military Standard Dust Test Chamber can be configured for dust tests by changing the test medium and adjusting parameters. Standard accessories include 20 kg of test dust (quartz powder, <150 μm) and 20 kg of test sand (quartz sand, 150–850 μm).

Q4: What safety measures are in place for operators?

A: The chamber is installed in an isolated room. Operators must wear dust masks, protective suits, and gloves when opening the door. The chamber also includes a door limit switch and exhaust system to minimize dust leakage.

Q5: How is residual sand/dust cleaned after a test?

A: A cartridge filter extracts most dust from the circulating air. For any residue inside the duct, operators in protective suits use a heavyduty industrial vacuum cleaner.

Why Choose ALP Technology (t&m) Ltd ?

ALP TECHNOLOGY (T&M) LTD is a joint-stock enterprise specializing in environmental testing instrumentation. Guided by "Technological Excellence Rooted in Integrity," ALP serves the lithium battery industry, aerospace, defense, energy, telecommunications, automotive, and research sectors. With clients in over 50 countries across five continents – including government labs, leading lithium battery manufacturers, and Fortune 500 companies – ALP delivers one-stop solutions from temperature chambers and thermal shock testers to salt spray, UV, sand/dust, rain test chambers, and explosion-proof walk-in chambers. Our greatest strength is customization: we design, produce, install, and maintain according to your specific requirements.