G135 Qubitac Sealant is perfect for sealing delicate plant tissue in a sample chamber.  Qubitac Stops leaks in gas exchange systems, immobilizes items without sticking to them permanently.  It is a soft, flexible and reusable synthetic polymer compound. It comes in 1 or 2kg packaging. 

 Features include:

• Gas impermeable and light opaque
• Non-toxic
• Sticks to glass, rubber, plastic components without bonding
• Air-tight seal around probes, sensors, stoppers and connections
• Doesn’t produce or consume CO2, O2, H2, or C2H2
• Doesn’t produce or consume biologically important gases
• Sticks to plant tissue without damaging plant
• Allows plants to grow normally while sealed

When using A241-R a small amount of glass wool should be placed towards the outlet of the column, and the column should  be filled with soda lime tightly. The column should be mounted VERTICALLY on the laboratory stand.

The soda lime has a coloured indicator to show when it is spent. The soda lime should be replaced when most of it has changed from its original white colour to a pale purple. This colour change is subtle, and the purple coloration often does not persist, but appears as a band in the column at the junction between active and inactive soda lime.

The A382 is composed of a CO2 Scrubbing Column filled with soda lime for removing CO2 from gases and a Drying Column,  filled with DRIERITE for removing moisture from gases. Both of the columns are 60ml each and are included with the purchase of the CO2 analyzers (S151 and S153).

The CO2 Scrubbing column of A382 has a colored indicator to show when it is exhausted. The color change is subtle, and the purple coloration often does not persist, but appears as a band in the column at the junction between active and inactive soda lime.

The drying column of A382 has a colored (blue) indicator DRIERITE  to shown when it is exhausted. The indicator turns pink when the DRIERITE is spent. When spent, the DRIERITE should be replaced or reconditioned. To recondition, remove the DRIERITE from the column and place it in a drying oven at 210^oC for 1 hour, or until the pink coloration disappears.

The A255 magnetic stirrer has variable speeds. Lower speeds should be used for more fragile samples, whereas higher speeds may be used for more robust samples and for studies of enzymatic reactions. To achieve the highest accuracy, the electrode should be both calibrated and used at the same stirring speed.

Specifications:

• power supply: 9.0V, 0.56A
• size (h/w/l) cm: 6.0/9.0/11.0
• weight (g): 500
• materials: sheet metal (black)

The A248 Battery Pack and Charger is a portable power system that can supply up to 600 watts of  electricity (800AMP).  It is included with Q-Box SR1LP Soil Respiration Package  or any other Q-Box package  for use in the field (16-20 hrs of operation).

• Built-in 600W inverter
• Three 115 VAC power outlets, one 12 VDC outlet and 5V 500mA  USB power port
• Sealed, non-spillable 28 amp-hour AGM battery
• built-in LED light
• 3-digit display allows for easy battery status monitoring
• battery capacity indicator
• Overload and over-temperature protection to ensure longer inverter life
• boosting cable port with detachable boosting cables
• Recharge in the lab, at home or from a vehicle
• 1 year warranty

The device connects to the LabPro interface via BTA connection.

The S172Dissolved O2 Cuvette Thermistor is incorporated into the plunger of the cuvette so that it measures the temperature of the sample directly. This allows corrections to be made for measurements of dissolved oxygen when the oxygen electrode is calibrated at one temperature and used at a different temperature. It also allows accurate investigations of the temperature dependence of physiological and biochemical processes.

The tip of the thermistor is very fine and encased in glass. It protrudes slightly from the lower surface of the plunger to make contact with liquid in the sample chamber.

The S171 Leaf Chamber Thermistor is accurate and rapid in measuring of leaf surface temperature.   It is essential for studying leaf CO2 and water vapor conductance.

The S171 Leaf Chamber Thermistor’s sensor head is a glass coated thermocouple and only 0.75 mm in diameter. The sensor housing screws into the base of the G112 Flow-Through Leaf Chamber and the sensor position can be easily adjusted to touch the surface of the leaf.

The S171 Leaf Chamber Thermistor is an optional addition to Q-Box CO650 Plant CO2 Analysis Packages. It comes fully calibrated and plugs directly into the C410 LabPro Interface and displays values of leaf temperature on a computer screen using C901 Logger Pro Software.