Page 178 - Shaping A Sustainable Future

Comparing the different sensors from the table, we
decided to select the Passive Infrared sensor (PIR) as it is
not very costly compared to the tomographic sensor. It
is also commonly used for light and alarm systems.

In consultation with Mr Ng from J316, we decided on
the following model for the PIR Sensor.

PIR Sensor Manufacturer: PANASONIC (see Figure 4)
• Manufacturer Part No: EKMB1306112K
• Sensing Range Max: 17m
• Supply Voltage Min: 2.3VDC
• Supply Voltage Max: 4VDC Figure 4: Pictures of sensor.
• Beam Angle: 62°
• Response Time: -
• Product Range: WL Series
• Pictures of sensor

The estimated budget for the eco-solutions is shown in Table 7.

No. Items Qty Unit Cost Total Cost Remarks
1 Solar Panels 24 NA NA Provided by J316
2 Lithium Batteries 30 NA NA Provided by J316
3 PIR Sensors 20 $20.38 $407.6 To Procure
4 Installation of Solar Panels 24 $265/W $6360 To engage Contractors
(Rated power per panel is 265W)
5 Installation of Lithium Batteries 30 $20 $600 To engage Contractors
6 Installation of PIR Sensors 20 $20 $400 To engage Contractors

Table 7: Comparing the Pros and Cons of the solar panels

Since items 1 and 2 are supplied by J316, the total proposed budget is Items 3 + 4 + 5 + 6 = $407.6 + $6,360 + $600
+ $400= $7,767.6

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