A&D Medical UA-611 vs Rossmax CH155f

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UA-611 compared with CH155f

	A&D MedicalUA-611	RossmaxCH155f
Overview
Released
Released	–	–
Measuring
Type
Type	Upper arm	Upper arm
Irregular heartbeat detection
Irregular heartbeat detection	Yes	Yes
AFib detection or ECG
AFib detection or ECG	–	No
Method
Method	Automatic oscillometric measurement with fuzzy-logic-controlled inflation; designed for adult home use; first on-sale date not established	Automatic oscillometric upper-arm measurement during deflation, with semiconductor pressure sensor. Intended for adult home use; first-sale date unresolved
Accuracy
Accuracy	Maker specification ±3 mmHg pressure and ±5% pulse; pressure range 0–299 mmHg, systolic 60–279 mmHg, diastolic 40–200 mmHg and pulse 40–180 beats/min	Pressure 30–260 mmHg; pulse 40–199 bpm. Maker accuracy ±3 mmHg pressure and ±5% pulse
Clinical validation
Clinical validation	A&D UK claims ESH 2010 validation; Medaval identifies the UK BIHS recommendation as manufacturer-declared equivalence to the UA-651 and says the equivalence study is unpublished. The US Validate BP listing covers UA-611 under ANSI/AAMI/ISO 81060-2:2018 with different cuff options; this does not establish direct validation of the supplied UK cuff configuration	Maker claims ESH validation and AAMI/ANSI/ISO 81060-2 conformity. Exact current hardware revision and independent clinical-study identity unresolved, so headline validation omitted
Features
Features	Irregular heartbeat indicator, pressure progress bar, WHO classification indicator, stored-reading average and automatic power-off; irregular heartbeat indication is not a specific AFib diagnosis	Generic irregular-heartbeat, movement and hypertension indicators; one-touch automatic operation. No AFib-specific screening, ECG or speech guidance documented
Cuff
Cuff fits
Cuff fits	22–32 cm	24–40 cm
Cuff
Cuff	Supplied latex-free and metal-free SlimFit cuff fits 22–32 cm; optional large cuff fits 31–45 cm, sold separately; UK manual says this model is not designed for a small cuff	Latex-free Universal Cone Cuff, 24–40 cm; flyer says other cuff sizes available upon request but does not specify their ranges
Connections and memory
Users
Users	–	1
Readings stored
Readings stored	30	90 (better)
Bluetooth and app
Bluetooth and app	No	No
Memory
Memory	Last 30 blood pressure and pulse measurements, with stored-reading average; no separate user memories listed	Single 90-reading history with latest-three average and sequence numbers; no separate user histories, guest mode or clock documented
App
App	No Bluetooth; readings can be recorded manually	No Bluetooth or phone-app transfer documented
Power
Power	Four AA 1.5 V batteries; maker claims approximately 700 measurements with LR6 alkaline batteries or 200 with R6P manganese batteries at 180 mmHg and 23°C. UA-611 has no DC socket; the optional adapter in the shared manual applies only to UA-651	Four AAA cells, DC 6 V; automatic shutdown after one minute without key operation. Exact model guide has no AC-power specification and product page lists no adaptor socket
Design
Display details
Display details	Systolic pressure, diastolic pressure and pulse shown with battery, irregular heartbeat and pressure/classification indicators	LCD with movement, irregular-heartbeat, memory, pressure, pulse and risk indicators; IP21
Size
Size	Approximately 96 × 68 × 130 mm (width × height × depth); approximately 230 g excluding batteries	124 × 85 × 68.6 mm (L × W × H); maker guide lists 330 g without batteries
In the box
In the box	UA-611 monitor, 22–32 cm SlimFit cuff, instruction manual and four AA batteries in the UK pack	Maker lists batteries, Universal Cone Cuff, instruction manual and string bag