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USS-HMA02 heated-mass-loss analyzer: what the specifications actually support
The U.S. Solid USS-HMA02 is a halogen moisture analyzer built around thermogravimetric measurement: the instrument determines an initial sample weight, heats the sample with an internal halogen dryer, continuously weighs it, and reports the loss as moisture or dry-solids content.[2] For a buyer, that makes it a prepared-sample mass-loss reference instrument—not evidence of water activity, food acceptance, clinical performance, or a regulated compliance result.
This review keeps the practical scope narrow: prepared, known nonflammable, nonhazardous, nonclinical laboratory reference samples. The manual prohibits drying samples that could create a dangerous reaction, explosion or poisonous gas, warns about toxic or corrosive vapors, and cautions that hot parts can burn. Its conditional fume-cupboard language is not permission to use hazardous materials under this review’s narrower scope.[2] That is a boundary for this article, not a hazardous-sample procedure or a claim that the manufacturer forbids every use outside it.
What you are buying
The maker identifies the model as USS-HMA02 and lists a 110 g capacity, 0.001 g weight readability, 0.01% moisture readability, a 450 W halogen lamp, a 90 mm pan, RS-232, a 1–99 minute time-setting range, and 110V 60Hz AC power.[1] The manual repeats the core figures, including the 40–199°C temperature range, 1–99 min timer, 90 mm pan, RS-232 interface, and 110V/60Hz AC power.[2]
Read “readability” literally. The manual and maker give 0.001 g and 0.01% as displayed increments, while the retail title calls 0.01% “accuracy.”[1][2][3] This article does not upgrade a readability specification into achieved accuracy, user uncertainty, or a compliance certificate. The supplied 100 g external mass is described as a calibration weight or adjustment item, not proof of accuracy or a stated calibration-grade reference.[1][2]
Heating and endpoint controls
The documented drying modes are Standard, Fast, and Soft. Standard maintains a constant drying temperature; Fast raises the drying temperature rapidly; and Soft raises it slowly.[2] The manual adds an important qualification: in Fast mode, the initial temperature will exceed the set value and later drop to that set temperature. In Soft mode, the heater rises more slowly and the rise-phase time can be set manually.[2] Therefore, 40–199°C is the stated setpoint range, not a claim about maximum heater temperature or actual sample temperature.
Endpoint selection is separate from heating mode. Automatic ending stops when moisture content does not change within 45 seconds and takes effect after 15 seconds of heating; Manual ending uses the START/STOP control; Timing ending stops at a preset analysis time.[2] The documentation does not give a numeric mass threshold, a guaranteed 60-second completion, or a universal timing accuracy. Retail language about three-to-five-minute operation or stabilization is not treated here as achieved performance.[1][3]
Methods, displays, and connectivity
The manual says the analyzer stores 16 method groups labeled 0 through F. Group 0 is the unchangeable factory setting, while groups 1 through F are adjustable.[2] The maker and retail record describe 15 groups, which can be read as the adjustable groups, but neither source establishes a memory capacity for 15 completed result logs.[1][3] The documented roles are method presets and settings such as drying mode, ending mode, and drying time—not a verified result archive or cloud workflow.
Results are described as moisture content, dry content, or residual weight in grams.[2] The instrument has an RS-232 interface.[1][2] That does not establish USB compatibility, included cable, host software, protocol details, modern operating-system support, or a ready-made export pipeline. Treat it as a standalone LCD instrument unless the delivered documentation and your own integration checks establish more.
Package, power, and physical fit
The manual’s scope-of-delivery list contains 50 aluminum sample pans, one sample pan holder, one sample pan handle, one draft shield, one power cable, one 100 g calibration weight, one instruction manual, and one Quality Certification.[2] The paper is not, by itself, proof of traceable calibration or unit uncertainty. The exact current box contents and manual revision for a delivered unit remain unknown.
Power is a material buying check: the maker, manual, and exact retail record identify 110V 60Hz AC.[1][2][3] Confirm the label, plug, grounding arrangement, and compatibility with the local mains before use; do not transfer this specification to a 230V model.
The published dimensions conflict. The maker lists 210 × 340 × 180 mm and 4.74 kg net, while the manual lists 240 × 365 × 180 mm and 4.9 kg net, plus 7.1 kg shipping weight.[1][2] The sources do not establish which footprint describes a delivered unit; confirm the current dimensions and available bench space before installation. The 90 mm pan is a pan-size specification, not the overall machine height or chamber clearance.[1][2]
The buying decision
Choose the USS-HMA02 when you need a documented halogen-heated mass-loss workflow for prepared, nonhazardous laboratory reference samples, want selectable drying and ending modes, and can work with 110V/60Hz AC and an RS-232-labeled standalone instrument.[1][2] Do not choose it on the basis of retail “accuracy,” fast-result, uniform-heating, food, clinical, CE, or safety phrasing as though those claims were independently verified performance or compliance.[1][3]
As an Amazon Associate I earn from qualifying purchases.
Check the exact U.S. Solid USS-HMA02 offer on Amazon.
Sources
The cited manual is a 29-physical-page maker-linked document. Its model-specific table identifies USS-HMA02, but the revision shipped with any particular unit is unknown. The maker page and selected Amazon listing are separate sources; retailer claims are not independent performance verification.