Materials:

200 mL mason jar Find Part
• $0.01-$0.04/jar (Bulk discount; MIN = 10,000 units)
• Per unit: $0.04
Glass reference electrode housing Find Part
• Cost: $2.65/8 tubes
• Per unit: $0.33
Magnesia sticks (needed to complete housing) Find Part
• Cost: $43.70
• Makes 500 housings
• Per unit: $0.09
Potassium Chloride Find Part
• $219.34/2.5 kg
• 1.3 g/housing
• Per unit: $0.01
Titanium wire Find Part
• 15cm/wire
• Per unit: $0.81
Carbon felt Find Part
• $52.18 per sheet
• 30 x 30 cm (6.35mm thick)
• 25 x 25 mm/unit
• 144 electrodes per sheet
• Per unit: $0.36
Sterile 18G needles Find Part
• $0.05 ea.
• x 2 per unit
• Per unit: $0.10
3mL syringe Find Part
• Per unit: $0.04
Rubber stopper Find Part
• trade size #12 (2 1/2", tapered to 2 1/8")
• Per unit: $2.31
Rubber stopper Find Part
• trade size C (3/8" tapered to 7/32")
• Per unit: $0.71
Octogonal magnetic stir bars with pivot ring Find Part
• Per stir bar: $3.96
• Bulk unit via MSU chemistry store
• Per unit: $1.60
Leit-C for microscopy (carbon cement for electrodes) Find Part
• $48.20
• Makes 75 eletrodes
• Per unit: $0.64
Xylene Find Part
• Per 500ml: $0.01
18G Hypodermic sampling needle (4") Find Part
• Cost: $39.26
• Package has 100 needles
• Per unit: $0.39







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