Product comparison · 2 smoke detectors

Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless vs Hama GS 558

13specifications compared
6differ
7identical
19known for one product only

Key differences

The Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless has 5 dB more alarm decibels than the Hama GS 558 (90 dB vs 85 dB). The Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless has 980 m more maximum range than the Hama GS 558 (1000 m vs 20 m). The Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless has 7.1 mm more height than the Hama GS 558 (43.1 mm vs 36 mm). Only the Hama GS 558 has interconnectable. Battery type: CR123A on the Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless, AA on the Hama GS 558.

Interconnectable
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:No
- GS 558:Yes
Alarm decibels
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:90 dB
- GS 558:85 dB
Maximum range
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:1000 m
- GS 558:20 m
Battery type
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:CR123A
- GS 558:AA
Compatible battery sizes
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:CR123A
- GS 558:AA
Height
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:43.1 mm
- GS 558:36 mm

Side by side

Differences highlightedShow differences only

Comparison of DHI-HY-SA21A-W2(868), GS 558
32 specifications	A Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless Model DHI-HY-SA21A-W2(868) View product	B Hama GS 558 View product
Features3 differ
InterconnectableDiffers	No	Yes
BandwidthKnown for one	868.3 MHz	Unknown — not stated by the source
Housing materialKnown for one	ABS	Unknown — not stated by the source
Suitable for indoor useKnown for one	Yes	Unknown — not stated by the source
Light alarmKnown for one	Yes	Unknown — not stated by the source
LED indicatorsKnown for one	Alarm, Fault, Power	Unknown — not stated by the source
Alarm decibelsDiffers	90 dB	85 dB
Maximum rangeDiffers	1000 m	20 m
Test buttonKnown for one	Unknown — not stated by the source	Yes
Number of simultaneously connected devices (max)Known for one	Unknown — not stated by the source	10
Power2 differ
Input voltageKnown for one	3 V	Unknown — not stated by the source
Battery lifeKnown for one	3 year(s)	Unknown — not stated by the source
Battery typeDiffers	CR123A	AA
Compatible battery sizesDiffers	CR123A	AA
Number of batteries supportedKnown for one	Unknown — not stated by the source	2
Operational conditionsidentical
Operating temperature (T-T)Known for one	-10 - 55 °C	Unknown — not stated by the source
Operating relative humidity (H-H)Known for one	0 - 95%	Unknown — not stated by the source
Certificatesidentical
CertificationKnown for one	EN 14604:2005+AC:2008	Unknown — not stated by the source
Weight & dimensions1 differ
DiameterKnown for one	9.8 cm	Unknown — not stated by the source
HeightDiffers	43.1 mm	36 mm
WeightKnown for one	140 g	Unknown — not stated by the source
WidthKnown for one	Unknown — not stated by the source	120 mm
DepthKnown for one	Unknown — not stated by the source	120 mm
Batteryidentical
Battery technologyKnown for one	Lithium	Unknown — not stated by the source
Sustainabilityidentical
Compliance certificatesKnown for one	CE	Unknown — not stated by the source

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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