Product comparison · 2 smoke detectors

Dahua Technology DHI-HY-SA40A-R8 smoke detector Interconnectable Wired vs Dahua Technology HY-SA21A-W2 Photoelectrical reflection detector Wireless

8specifications compared
3differ
5identical
20known for one product only

Key differences

The Dahua Technology HY-SA21A-W2 Photoelectrical reflection detector Wireless has 30 g more weight than the Dahua Technology DHI-HY-SA40A-R8 smoke detector Interconnectable Wired (140 g vs 110 g). Connectivity technology: Wired on the Dahua Technology DHI-HY-SA40A-R8 smoke detector Interconnectable Wired, Wireless on the Dahua Technology HY-SA21A-W2 Photoelectrical reflection detector Wireless. Battery technology: Lithium-Ion (Li-Ion) on the Dahua Technology DHI-HY-SA40A-R8 smoke detector Interconnectable Wired, Lithium on the Dahua Technology HY-SA21A-W2 Photoelectrical reflection detector Wireless.

Connectivity technology
- DHI-HY-SA40A-R8 smoke detector Interconnectable Wired:Wired
- HY-SA21A-W2 Photoelectrical reflection detector Wireless:Wireless
Weight
- DHI-HY-SA40A-R8 smoke detector Interconnectable Wired:110 g
- HY-SA21A-W2 Photoelectrical reflection detector Wireless:140 g
Battery technology
- DHI-HY-SA40A-R8 smoke detector Interconnectable Wired:Lithium-Ion (Li-Ion)
- HY-SA21A-W2 Photoelectrical reflection detector Wireless:Lithium

Side by side

Differences highlightedShow differences only

Comparison of DHI-HY-SA40A-R8, HY-SA21A-W2
28 specifications	A Dahua Technology DHI-HY-SA40A-R8 smoke detector Interconnectable Wired Model DHI-HY-SA40A-R8 View product	B Dahua Technology HY-SA21A-W2 Photoelectrical reflection detector Wireless Model HY-SA21A-W2 View product
Features1 differ
Detector typeKnown for one	Unknown — not stated by the source	Photoelectrical reflection detector
Connectivity technologyDiffers	Wired	Wireless
BandwidthKnown for one	Unknown — not stated by the source	868.3 MHz
Housing material	ABS	ABS
Product colour	White	White
Suitable for indoor useKnown for one	Unknown — not stated by the source	Yes
Light alarmKnown for one	Unknown — not stated by the source	Yes
LED indicatorsKnown for one	Unknown — not stated by the source	Alarm, Fault, Power
Alarm decibelsKnown for one	Unknown — not stated by the source	90 dB
Alarm muteKnown for one	Unknown — not stated by the source	Yes
Maximum rangeKnown for one	Unknown — not stated by the source	1000 m
InterconnectableKnown for one	Yes	Unknown — not stated by the source
Poweridentical
Power source	Battery	Battery
Input voltageKnown for one	Unknown — not stated by the source	3 V
Battery lifeKnown for one	Unknown — not stated by the source	3 year(s)
Battery low indicationKnown for one	Unknown — not stated by the source	Yes
Battery typeKnown for one	Unknown — not stated by the source	CR123A
Compatible battery sizesKnown for one	Unknown — not stated by the source	CR123A
Battery voltageKnown for one	3 V	Unknown — not stated by the source
Operational conditionsidentical
Operating temperature (T-T)	-10 - 55 °C	-10 - 55 °C
Operating relative humidity (H-H)	0 - 95%	0 - 95%
Weight & dimensions1 differ
DiameterKnown for one	Unknown — not stated by the source	9.8 cm
HeightKnown for one	Unknown — not stated by the source	43.1 mm
WeightDiffers	110 g	140 g
WidthKnown for one	81.5 mm	Unknown — not stated by the source
DepthKnown for one	51.6 mm	Unknown — not stated by the source
Battery1 differ
Battery technologyDiffers	Lithium-Ion (Li-Ion)	Lithium
Sustainabilityidentical
Compliance certificatesKnown for one	Unknown — not stated by the source	CE

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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