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. 2021 Mar 11;9:e00191. doi: 10.1016/j.ohx.2021.e00191
Designator Component Number Cost per unit -currency Total cost - currency Source of materials Material type
PVC Cap 1 1/4″ PVC cap 1 $1.20 $1.20 McMaster Polymer
PVC Pipe 1–1/4″ 1ft PVC pipe 1 $10.37 $10.37 McMaster-Carr Polymer
U-bolt U-Bolt 2 $4.85 $9.70 McMaster Metal
Pipe Tee 1–1/4″ pipe tee 1 $15.43 $15.43 McMaster Metal
3/4 NPT Cable Grip 3/4 NPT cable grip 1 $4.61 $4.61 McMaster Polymer
M2 Insert M2 Taper Heat-Set Inserts 8(A) $0.15 $1.20 McMaster-Carr Metal
M2 Screw M2 × 0.4 mm stainless steel socket head screw 8(B) $0.17 $1.36 McMaster-Carr Metal
1/4–20 Screw 1/4″-20 x5/8″ Stainless Steel Button Head Screw 2(B) $0.13 $0.26 McMaster-Carr Metal
PG7 Cord Grip PG7 cord grip 10(C) $0.39 $3.99 Amazon Polymer
Pelican Case Pelican 1120 case (orange) 1 $39.00 $39.00 Amazon Polymer
Potting Compound Potting Compound 50 mL 1 $6.99 $6.99 Amazon Polymer
MicroSD Card 16 GB MicroSD Card 1 $13.95 $13.95 Amazon Semiconductor
MicroSD Card Extension MicroSd card extension 1 $5.79 $5.79 Amazon Non-specific
JST XH Connector JST XH connectors 1 $9.87 $9.87 Amazon Non-specific
JST SM Connector JST SM connector 1 $12.99 $12.99 Amazon Non-specific
Ribbon Cable Ribbon Cable 1 $6.99 $6.99 Amazon Non-specific
USB Extension Waterproof panel mount micro-USB connector 1 $14.35 $14.35 USBFirewire Non-specific
USB Extension Cap Sealing cap for panel mount micro-USB connector 1 $2.50 $2.50 USBFirewire Non-specific
Ethernet Cable 75ft ethernet cable 2 $9.69 $19.38 Monoprice Non-specific
1/16″ Heat shrink 1/16″ heat shrink tubing 1 $0.38 $0.38 Digikey Polymer
5/16″ Heat shrink 5/16″ adhesive lined heat shrink 1 $2.61 $2.61 Digikey Polymer
10 k Resistor 10 k 0805 resistor 4 $0.11 $0.44 Digikey Non-specific
100nF Capacitor 100nF 0805 capacitor 2 $0.10 $0.20 Digikey Non-specific
u.Fl Connector u.Fl connector 1 $0.75 $0.75 Mouser Non-specific
Waterproof Cable Waterproof 4 pin cable set 10 $2.50 $25.00 Mouser Non-specific
MMA8451 Accelerometer MMA8451 Accelerometer 1 $7.95 $7.95 Mouser Non-specific
Ms5803 Ms580302ba pressure sensor 2 $10.72 $21.44 Mouser Non-specific
Sht31D Sht31D humidity sensor 1 $13.95 $13.95 Mouser Non-specific
STEMMA Adafruit STEMMA Capacitive soil moisture sensor 4 $7.50 $30.00 Mouser Non-specific
Feather M0 Feather M0 LoRa 1 $34.95 $34.95 Mouser Non-specific
Battery 6600mAh Lithium Battery 5 $29.50 $147.50 Mouser Non-specific
Feather Doubler Feather doubler 1 $7.50 $7.50 Mouser Non-specific
Female Headers Female headers 3 $1.50 $4.50 Mouser Non-specific
TCA9548A TCA9548A multiplexer 1 $6.95 $6.95 Mouser Non-specific
Antenna LoRa Antenna 1 $15.93 $15.93 Mouser Non-specific
Coin Cell CR1220 coin cell battery 1 $0.95 $0.95 Mouser Non-specific
Teros Teros 11 3 $190.00 $570.00 Meter Group Non-specific
Tipping Bucket Tipping Bucket 1 $95.00 $95.00 Davis Instruments Non-specific
MS5803 PCB Smart rock MS5803 PCB 2 $0.48 $0.96 https://osf.io/e8vqd/ Non-specific
I2C multiplexer PCB I2C multiplexer PCB 1 $5.77 $5.77 https://osf.io/djebn/ Non-specific
Battery PCB JST parallel PCB 1 $1.98 $1.98 https://osf.io/djebn/ Non-specific
Hypnos Hypnos Board 1 $33.00 $33.00 OPEnS Lab Non-specific