What Is A&D's Super Hybrid Sensor (SHS) Technology?

How conventional EMFR balances work

Electromagnetic force restoration balances measure mass by applying an opposing electromagnetic force to the balance beam until equilibrium is reached. The current required to maintain equilibrium is proportional to the mass on the pan. EMFR balances are the reference standard for high-precision analytical weighing because the electromagnetic mechanism has no moving parts that wear, provides intrinsically linear output, and achieves readability to 0.001 mg.

The limitation of conventional EMFR is speed: the electromagnetic coil must settle to equilibrium after a load is placed, and any vibration or air current during this settling process causes erratic readings. This is why analytical balances require enclosed draft shields and anti-vibration tables — and why they are typically slower to stabilise (3–10 seconds) than strain gauge balances.

How SHS differs

SHS uses a single-point parallelogram load cell — the mechanism used in precision and industrial balances — as the primary mechanical element, but applies electromagnetic force feedback to the load cell output rather than to a separate beam. This architecture gives SHS the corner-load immunity of a parallelogram cell (any off-centre placement of the sample on the pan gives the same result as centred placement) while retaining the linearity and repeatability of electromagnetic force restoration.

The practical result is faster stabilisation: A&D SHS balances typically stabilise in 1.0–1.5 seconds, versus 3–5 seconds for conventional EMFR analytical balances. For a pharmaceutical dispensing operation weighing 200 samples per shift, this difference translates to approximately 15 minutes of recovered productivity.

SHS versus strain gauge — what's the difference?

Conventional precision and industrial balances use strain gauge load cells: a metal beam deforms under load, and the resistance change in attached strain gauges is measured. Strain gauges are inexpensive and robust, but their output drifts with temperature and they cannot match EMFR linearity at high resolutions (below 0.01 g). SHS delivers EMFR-quality linearity at precision-balance stabilisation speeds — the best of both technologies.

For the end user, this means A&D SHS precision balances (GX-A/GF-A, FZ-i/FX-i series) outperform competitor strain-gauge balances on repeatability (typically ±0.05–0.1 mg vs ±0.2–0.3 mg for strain gauge at the same capacity) and maintain this performance across the ambient temperature range found in UAE laboratories and manufacturing facilities.

Which A&D instruments use SHS?

SHS is used in A&D Japan's full analytical and precision balance range, including the BM Series micro-analytical balances, GH and GR Series analytical balances, GX-A/GF-A Apollo Series precision balances, FZ-i/FX-i Series precision balances, and the HR-i Series top-loading balances. The SHS mechanism is the primary reason A&D balances command a price premium over entry-level strain-gauge precision balances, and why they are the preferred instrument for pharmaceutical QC, gold trading, and analytical laboratory applications in the UAE.