Lettuce Handbook - System Component Information

System Component Information

Note: References to company and brandnames are used for identification purposes only and do not necessarily constitute endorsements over similar products made by other companies.

Dissolved Oxygen Sensor
Model:	Orion 820, hand held, battery operated
Manufacturer:	Orion Research, Inc., Boston , MA
Specifications:	Output: 10 mV per mg/l Response time: 99% of final value in less than 40 sec at 20°C Min. sample flow: 15 cm/sec Temp. range: 0 - 50°C Membrane: Teflon® FEP, thickness: 12.5 mm

Electric Soil Heating Cable

Model: N100

Manufacturer: Phytotronics, Inc., St. Louis, MO

Compact Submersible Centrifugal Pump

Model: 1P808A

Manufacturer: Teel

Distributor: Dayton Electric Mfg. Co., Chicago, IL

Specifications: 0.02 HP, 75 W, max 1.5 Amps

flow rate versus pressure head:

rate
(1/min) head
(kPa)

25.2 3.0

21.4 9.0

18.9 14.9

11.4 26.9

max head: 32.9 kPa

Flow Meters

Models: H-03216-04: 65 mm variable area aluminum flow meter with valve and glass float for O₂
H-03216-26: 65 mm variable area aluminum flow meter with valve and stainless steel float for N₂

Manufacturer: Cole Parmer Instrument Co., Niles, IL

Specifications: Max. flow rate for O₂ = 46 ml/min
Max. flow rate for N₂ = 5026 ml/min