Product comparison · 2 smoke detectors

Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless vs Hama GS 508

9specifications compared
4differ
5identical
20known 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 508 (90 dB vs 85 dB). The Hama GS 508 has 0.2 cm more diameter than the Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless (10 cm vs 9.8 cm). The Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless has 13.1 mm more height than the Hama GS 508 (43.1 mm vs 30 mm). Battery life: 3 year(s) on the Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless, 10 year(s) on the Hama GS 508.

Alarm decibels
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:90 dB
- GS 508:85 dB
Battery life
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:3 year(s)
- GS 508:10 year(s)
Diameter
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:9.8 cm
- GS 508:10 cm
Height
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:43.1 mm
- GS 508:30 mm

Side by side

Differences highlightedShow differences only

Comparison of DHI-HY-SA21A-W2(868), GS 508
29 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 508 View product
Features1 differ
Detector type	Photoelectrical reflection detector	Photoelectrical reflection detector
InterconnectableKnown for one	No	Unknown — not stated by the source
Connectivity technologyKnown for one	Wireless	Unknown — not stated by the source
BandwidthKnown for one	868.3 MHz	Unknown — not stated by the source
Housing materialKnown for one	ABS	Unknown — not stated by the source
Product colour	White	White
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
Alarm muteKnown for one	Yes	Unknown — not stated by the source
Maximum rangeKnown for one	1000 m	Unknown — not stated by the source
Mounting typeKnown for one	Surface-mounted	Unknown — not stated by the source
Power1 differ
Power source	Battery	Battery
Input voltageKnown for one	3 V	Unknown — not stated by the source
Battery lifeDiffers	3 year(s)	10 year(s)
Battery low indication	Yes	Yes
Battery typeKnown for one	CR123A	Unknown — not stated by the source
Compatible battery sizesKnown for one	CR123A	Unknown — not stated by the source
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 & dimensions2 differ
DiameterDiffers	9.8 cm	10 cm
HeightDiffers	43.1 mm	30 mm
WeightKnown for one	140 g	Unknown — not stated by the source
WidthKnown for one	Unknown — not stated by the source	100 mm
DepthKnown for one	Unknown — not stated by the source	100 mm
Batteryidentical
Battery technology	Lithium	Lithium
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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