Table 2.
Commercial vendor 2011 part numbers and pricing for sap flow probe and voltage regulator materials.
| Item | Vendor | Part No. | Price/unit |
|---|---|---|---|
| Pipette (10 μL) | Cole-Parmer | EW-07950-20 | $13.50/100 pc. |
| Heat shrink tubing | DigiKey | A014B-4-ND | $1.69/1.22 m |
| Capacitor (0.1 μF) | DigiKey | P984-ND | $0.26 ea. |
| Resistor (240 Ω) | DigiKey | 240QBK-ND | $0.07 ea. |
| Voltage reg. (LM317) | DigiKey | LM317TFS-ND | $0.68 ea. |
| Potentiometer | DigiKey | CT2263-ND | $1.55 ea. |
| Stainless steel needle | McMaster-Carr | 75165A75A | $14.41/50 pc. |
| NiCr heater wire | McMaster-Carr | 8880K85 | $25.01/487.68 m |
| Heater extend wire | McMaster-Carr | 9697T1 | $35.00/76.20 m |
| Extend wire | McMaster-Carr | 7587K911 | $6.56/30.48 m |
| Electrical tape | McMaster-Carr | 76455A22 | $4.33/20.12 m |
| Cyanoacrylate | McMaster-Carr | 74555A44 | $4.92/0.1 oz. |
| PTFE tape | McMaster-Carr | 4591K12 | $1.74/15.24 m |
| Chromel TC wire | Omega | TFCH-005-50 | $16.00/15.24 m |
| Constantan TC wire | Omega | TFCC-005-50 | $16.00/15.24 m |
| Type E TC extend wire | Omega | EXTT-E-20-50 | $72.00/15.24 m |
| Dual pc board | RadioShack | 276-148 | $1.99 ea. |