Product comparison · 2 smoke detectors

Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless vs Techly I-ALARM-SMOKE smoke detector Photoelectrical reflection detector Wireless

8specifications compared
3differ
5identical
24known 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 Techly I-ALARM-SMOKE smoke detector Photoelectrical reflection detector Wireless (90 dB vs 85 dB). The Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless has 997 m more maximum range than the Techly I-ALARM-SMOKE smoke detector Photoelectrical reflection detector Wireless (1000 m vs 3 m). Operating relative humidity (H-H): 0 - 95% on the Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless, 0 - 80% on the Techly I-ALARM-SMOKE smoke detector Photoelectrical reflection detector Wireless.

Alarm decibels
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:90 dB
- I-ALARM-SMOKE smoke detector Photoelectrical reflection detector Wireless:85 dB
Maximum range
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:1000 m
- I-ALARM-SMOKE smoke detector Photoelectrical reflection detector Wireless:3 m
Operating relative humidity (H-H)
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:0 - 95%
- I-ALARM-SMOKE smoke detector Photoelectrical reflection detector Wireless:0 - 80%

Side by side

Differences highlightedShow differences only

Comparison of DHI-HY-SA21A-W2(868), I-ALARM-SMOKE
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 Techly I-ALARM-SMOKE smoke detector Photoelectrical reflection detector Wireless Model I-ALARM-SMOKE View product
Features2 differ
InterconnectableKnown for one	No	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
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 rangeDiffers	1000 m	3 m
Mounting typeKnown for one	Surface-mounted	Unknown — not stated by the source
Poweridentical
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 low indicationKnown for one	Yes	Unknown — not stated by the source
Battery typeKnown for one	CR123A	Unknown — not stated by the source
Compatible battery sizesKnown for one	CR123A	Unknown — not stated by the source
Battery voltageKnown for one	Unknown — not stated by the source	9 V
Operational conditions1 differ
Operating relative humidity (H-H)Differs	0 - 95%	0 - 80%
Certificatesidentical
CertificationKnown for one	EN 14604:2005+AC:2008	Unknown — not stated by the source
Weight & dimensionsidentical
DiameterKnown for one	9.8 cm	Unknown — not stated by the source
HeightKnown for one	43.1 mm	Unknown — not stated by the source
WeightKnown for one	140 g	Unknown — not stated by the source
WidthKnown for one	Unknown — not stated by the source	128 mm
DepthKnown for one	Unknown — not stated by the source	38 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
Packaging contentidentical
ManualKnown for one	Unknown — not stated by the source	Yes
Packaging dataidentical
Quantity per packKnown for one	Unknown — not stated by the source	1 pc(s)

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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