Product comparison · 2 smoke detectors

Dahua Technology DH-YJ104 smoke detector Optical beam detector Wired vs Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless

10specifications compared
9differ
1identical
19known for one product only

Key differences

The Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless has 88.2 dB more alarm decibels than the Dahua Technology DH-YJ104 smoke detector Optical beam detector Wired (90 dB vs 1.8 dB). The Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless has 900 m more maximum range than the Dahua Technology DH-YJ104 smoke detector Optical beam detector Wired (1000 m vs 100 m). The Dahua Technology DH-YJ104 smoke detector Optical beam detector Wired has 21 V more input voltage than the Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless (24 V vs 3 V). Detector type: Optical beam detector on the Dahua Technology DH-YJ104 smoke detector Optical beam detector Wired, Photoelectrical reflection detector on the Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless. Connectivity technology: Wired on the Dahua Technology DH-YJ104 smoke detector Optical beam detector Wired, Wireless on the Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless.

Connectivity technology
- DH-YJ104 smoke detector Optical beam detector Wired:Wired
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:Wireless
Alarm decibels
- DH-YJ104 smoke detector Optical beam detector Wired:1.8 dB
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:90 dB
Maximum range
- DH-YJ104 smoke detector Optical beam detector Wired:100 m
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:1000 m
Power source
- DH-YJ104 smoke detector Optical beam detector Wired:DC
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:Battery
Input voltage
- DH-YJ104 smoke detector Optical beam detector Wired:24 V
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:3 V
Operating temperature (T-T)
- DH-YJ104 smoke detector Optical beam detector Wired:-35 - 65 °C
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:-10 - 55 °C
Diameter
- DH-YJ104 smoke detector Optical beam detector Wired:12.3 cm
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:9.8 cm
Weight
- DH-YJ104 smoke detector Optical beam detector Wired:300 g
- DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless:140 g

Side by side

Differences highlightedShow differences only

Comparison of DH-YJ104, DHI-HY-SA21A-W2(868)
29 specifications	A Dahua Technology DH-YJ104 smoke detector Optical beam detector Wired Model DH-YJ104 View product	B Dahua Technology DHI-HY-SA21A-W2(868) smoke detector Photoelectrical reflection detector Wireless Model DHI-HY-SA21A-W2(868) View product
Features4 differ
Detector typeDiffers	Optical beam detector	Photoelectrical reflection detector
InterconnectableKnown for one	Unknown — not stated by the source	No
Connectivity technologyDiffers	Wired	Wireless
BandwidthKnown for one	Unknown — not stated by the source	868.3 MHz
Housing materialKnown for one	Unknown — not stated by the source	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 decibelsDiffers	1.8 dB	90 dB
Alarm muteKnown for one	Unknown — not stated by the source	Yes
Maximum rangeDiffers	100 m	1000 m
Mounting typeKnown for one	Unknown — not stated by the source	Surface-mounted
Power2 differ
Power sourceDiffers	DC	Battery
Input voltageDiffers	24 V	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
Operational conditions1 differ
Operating temperature (T-T)Differs	-35 - 65 °C	-10 - 55 °C
Operating relative humidity (H-H)Known for one	Unknown — not stated by the source	0 - 95%
Certificatesidentical
CertificationKnown for one	Unknown — not stated by the source	EN 14604:2005+AC:2008
Weight & dimensions2 differ
DiameterDiffers	12.3 cm	9.8 cm
HeightKnown for one	Unknown — not stated by the source	43.1 mm
WeightDiffers	300 g	140 g
WidthKnown for one	78.5 mm	Unknown — not stated by the source
DepthKnown for one	115 mm	Unknown — not stated by the source
Batteryidentical
Battery technologyKnown for one	Unknown — not stated by the source	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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