Product comparison · 2 smoke detectors

Dahua Technology DHI-HY-SA40A smoke detector Photoelectrical reflection detector Wired vs Hama GS 558

8specifications compared
5differ
3identical
18known for one product only

Key differences

The Hama GS 558 has 1 dB more alarm decibels than the Dahua Technology DHI-HY-SA40A smoke detector Photoelectrical reflection detector Wired (85 dB vs 84 dB). The Hama GS 558 has 1 more batteries supported than the Dahua Technology DHI-HY-SA40A smoke detector Photoelectrical reflection detector Wired (2 vs 1). The Dahua Technology DHI-HY-SA40A smoke detector Photoelectrical reflection detector Wired has 15.6 mm more height than the Hama GS 558 (51.6 mm vs 36 mm). Connectivity technology: Wired on the Dahua Technology DHI-HY-SA40A smoke detector Photoelectrical reflection detector Wired, Wireless on the Hama GS 558. Battery type: CR123A on the Dahua Technology DHI-HY-SA40A smoke detector Photoelectrical reflection detector Wired, AA on the Hama GS 558.

Connectivity technology
- DHI-HY-SA40A smoke detector Photoelectrical reflection detector Wired:Wired
- GS 558:Wireless
Alarm decibels
- DHI-HY-SA40A smoke detector Photoelectrical reflection detector Wired:84 dB
- GS 558:85 dB
Battery type
- DHI-HY-SA40A smoke detector Photoelectrical reflection detector Wired:CR123A
- GS 558:AA
Number of batteries supported
- DHI-HY-SA40A smoke detector Photoelectrical reflection detector Wired:1
- GS 558:2
Height
- DHI-HY-SA40A smoke detector Photoelectrical reflection detector Wired:51.6 mm
- GS 558:36 mm

Side by side

Differences highlightedShow differences only

Comparison of DHI-HY-SA40A, GS 558
26 specifications	A Dahua Technology DHI-HY-SA40A smoke detector Photoelectrical reflection detector Wired Model DHI-HY-SA40A View product	B Hama GS 558 View product
Features2 differ
Detector type	Photoelectrical reflection detector	Photoelectrical reflection detector
InterconnectableKnown for one	Unknown — not stated by the source	Yes
Connectivity technologyDiffers	Wired	Wireless
Test buttonKnown for one	Unknown — not stated by the source	Yes
Product colour	White	White
Alarm decibelsDiffers	84 dB	85 dB
Alarm muteKnown for one	Unknown — not stated by the source	Yes
Maximum rangeKnown for one	Unknown — not stated by the source	20 m
Mounting typeKnown for one	Unknown — not stated by the source	Surface-mounted
Number of simultaneously connected devices (max)Known for one	Unknown — not stated by the source	10
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	Yes	Unknown — not stated by the source
Power2 differ
Power source	Battery	Battery
Battery low indicationKnown for one	Unknown — not stated by the source	Yes
Battery typeDiffers	CR123A	AA
Number of batteries supportedDiffers	1	2
Compatible battery sizesKnown for one	Unknown — not stated by the source	AA
Battery lifeKnown for one	10 year(s)	Unknown — not stated by the source
Weight & dimensions1 differ
WidthKnown for one	Unknown — not stated by the source	120 mm
DepthKnown for one	Unknown — not stated by the source	120 mm
HeightDiffers	51.6 mm	36 mm
DiameterKnown for one	8.15 cm	Unknown — not stated by the source
WeightKnown for one	110 g	Unknown — not stated by the source
Operational conditionsidentical
Operating temperature (T-T)Known for one	-10 - 55 °C	Unknown — not stated by the source
Batteryidentical
Battery technologyKnown for one	Lithium	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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