Chambers and light sources

The LI-6800 will include one or more of the following chambers and light sources.

Fluorometer chamber

Part Number 6800-01A

The 6800-01A fluorometer is a combined chamber and light source that induces and measures fluorescence from a sample. It includes inserts to limit the aperture to 6 cm2 or 2 cm2. It is also the light source for the aquatic chamber. See Measuring chlorophyll a fluorescence for details. The fluorometer includes the following items:

Description Quantity Part Number
Fluorometer Chamber 1 9968-266
6 cm2 Aperture Inserts 2 6800-50
2 cm2 Aperture Inserts 2 6800-51
Fluorometer Spares Kit 1 9968-270
O-ring; 6×1.5 mm; for Leaf Temperature Thermocouple 1 192-14314
O-ring; 35×1.5 mm; for Apertures 2 192-16851
6 cm2 Aperture AP1 Gaskets (white upper/lower) 2 6568-512
2 cm2 Aperture AP Gaskets (white upper/lower) 2 6568-566
2 cm2 Aperture PE Gasket (white upper) 4 6564-202
2 cm2 Aperture NP Gasket (black lower) 4 6564-196
Fluorometer Gasket Kit   9968-208
6 cm2 Aperture PE Gasket (white upper) 4 6568-436
6 cm2 Aperture NP Gasket (black lower) 4 6568-413

One-sided leaf measurement kit

Part Number 9968-013

The one-sided leaf kit is available to isolate one side of a leaf for one-sided leaf measurements using the fluorometer. The leaf kit is described in licor.com/env/support/LI-6800/topics/one-sided-leaf-measurements.html.

Small leaf chamber (3×3 cm)

Part Number 6800-12A

The small chamber features a transparent Propafilm™ top window. It accommodates one fine wire thermocouple to measure leaf temperature. A GaAsP light sensor measures PAR in the chamber. It is compatible with the 3×3 cm light source. Aperture inserts limit the opening to 3×3 cm, 2×3 cm, or 1×3 cm. See Installing the small leaf chamber for details. The chamber includes the following items:

Description Quantity Part Number
Chamber 1 9968-264
1×3 cm Aperture Inserts 2 9968-294
2×3 cm Aperture Inserts 2 9968-295
3×3 cm Aperture Inserts 2 9968-296
Spares Kit 1 9968-269
O-ring; 6×1.5 mm 1 192-14314
O-ring; 48×1.5 mm; for Apertures 2 192-16680
Light Source Gaskets2 3 6568-071
3×3 cm Aperture AP Gaskets (white upper/lower) 2 6568-511
2×3 cm Aperture AP Gaskets (white upper/lower) 2 6568-562
1×3 cm Aperture AP Gaskets (white upper/lower) 2 6568-560
3×3 cm Aperture PE Gasket (white upper) 4 6568-429
3×3 cm Aperture NP Gasket (black lower) 4 6568-384
2×3 cm Aperture PE Gasket (white upper) 4 6564-156
2×3 cm Aperture NP Gasket (black lower) 4 6564-028
1×3 cm Aperture PE Gasket (white upper) 4 6568-584
1×3 cm Aperture NP Gasket (black upper) 4 6568-583

Small light source (3×3 cm)

Part Number 6800-02

The 3×3 cm light source mounts directly on top of the clear-top leaf chamber. Includes the light source spares kit (part number 9968-206). 3×3 cm light source gaskets are included with the clear-top chamber spares kit. See Connecting the small light source.

Description Quantity Part
Number
Gasket kit 1 9968-206
Light source gasket 3 6568-071
Leaf gasket (3×3 cm; black) 4 6568-384
Leaf gasket (3×3 cm; white) 4 6568-429

Large leaf and needle chamber (6×6 cm)

Part Number 6800-13

The 6×6 cm chamber features a clear Propafilm™ top window. It holds two fine wire thermocouples to measure the leaf temperature. An internal, upward facing GaAsP light sensor measures PAR in the chamber. It is compatible with the 6×6 cm light source. See Installing the large leaf chamber for details. The chamber includes the following items:

Description Quantity Part Number
Chamber 1 9968-159
Large Light Source Adapter Plate 1 9968-209
Large Light Source Chamber Adapter Kit 1 9968-189
Adapter Plate 2 9868-209
Mounting Screws; M3×0.5 8 mm 4 150-07475
Bottom Chamber Light Source Adapter Kit 1 9968-311
Light Source Spacer 1 9868-245
Screws; M3×0.5 10 mm 4 150-15307
Spares Kit 1 9968-207
O-ring; 6×1.5 mm 1 192-14314
O-ring; AS-154 Viton 75 1 192-12205
6×6 cm AP3 Gasket (white upper/lower) 2 6568-513
6×6 cm NP Gasket (black lower) 3 6568-210
6×6 cm PE Gasket (white upper) 6 6568-463
Thermocouple Hole Plug 2 6568-523
Propafilm Kit 1 9964-151

Large light source (6×6 cm)

Part Number 6800-03

The 6×6 cm light source mounts directly on top of the 6×6 clear-top chamber, small plant chamber, or the bryophyte chamber. See Connecting the large light source for details.

Description Quantity Part Number
Large Light Source (6×6 cm) 1 9968-089
Spares Kit 1 9968-249
Light Source Gasket 1 6568-199
Screwdriver; 6 mm Flat 1 611-16424
Mounting Screws; M3×0.5; 8 mm 4 150-07475
Retaining Washers 2 144-15345

Leaf chamber springs

Three types of chamber closure springs are available to close chambers with different levels of tension. In general, the springs that are installed on the chamber at the factory will work with that chamber under most circumstances. If, however, you are measuring delicate plant material, you may want to use the gentler springs. Be aware that the low pressure springs may result in more leaks around the leaf chamber gaskets.

Description Color Part Number
Low Pressure Springs; for delicate leaves White 9968-240
Medium Pressure Springs; for most leaves; default springs on the fluorometer and 3×3 cm chamber Silver 9968-131
High Pressure Springs; for the 6×6 cm chamber Black 9968-239
Three chamber springs for the LI-6800 are white, silver, and black, which correspond with low, medium, and high spring tension.
Figure 1‑8. Low pressure springs (white), medium pressure springs (silver), and high pressure springs (black).

Sprig adapter blocks

Part Number 9968-271

The sprig adapter blocks attach to the 6×6 cm clear-top chamber, increasing the volume to accommodate sprigs and shoots with whorled leaves. The blocks can be used in ambient lighting conditions and with one or two large light sources. See Conifer sprig kit for details. The sprig kit includes the following parts:

Description Quantity Part Number
Sprig Adapter Block with Film (upper) 1 9868-586
Sprig Adapter Block (lower) 1 9868-585
O-rings; AS-154 Viton 175 2 192-12205
Block Screws; Panhead M3×30 8 150-16889
Light Source Screws; Countersunk M3×30 1 150-06115

Light source extension cable

Part Number 9968-243

The light source extension cable is used to connect and operate a light source from the LI-6800 console ACCESSORY connector, which makes it possible to operate two light sources simultaneously. See Using two light sources simultaneously for details.

Small plant chamber

Part Number 6800-17

The small plant chamber is to measure gas exchange from whole Arabidopsis thaliana plants or other small, prostrate plants in 65 mm (2.5 inch) pots or 38 mm (1.5 inch) Cone-tainers™. The small plant chamber features a transparent Propafilm® cover for measurements under ambient light. It is compatible with the 6×6 cm light source, which enables measurements under controlled lighting with any combination of red, green and, blue light. See Small plant chamber for details. The chamber includes a spares kit (part number 9968-231) with the following items:

Description Quantity Part Number
Chamber 1 9968-280
Chamber Feet 2 9968-253
Spares Kit 1 9968-231
Bottom plate for 38 mm Cone-tainers™ 1 9868-555
Cone-tainers™; 38 mm (1.5") Diameter 5 610-09645
Valve Assembly for Cone-tainers™ 2 9968-261
Bottom Plate for 65 mm Pots 1 9868-554
Flower Pots; 65 mm (2.5") Diameter 6 610-09646
Valve Assembly for 65 mm Pots 2 9968-262
Propafilm™ Kit 1 9964-151
Gasket for 65 mm Pots 1 6564-279
O-ring; AS-150 2 192-09262
O-ring; AS-128 2 192-12880
O-ring; AS-041 1 192-05062
O-ring; 6×0.5 mm 1 192-14314
Screws; 4-40 1 122-00004
Large Light Source Chamber Adapter Kit 1 9968-190
Adapter Plate 1 9868-449
Screws; M3×0.5 8 mm; for mounting 4 150-13642

Bryophyte chamber

Part Number 6800-24

The bryophyte chamber is used to measure CO2 and H2O gas exchange from mosses, hornworts, liverworts, and lichens. The chamber holds loose material in a shallow well during the measurement. It features a clear Propafilm® top for measurements under ambient lighting conditions. It is compatible with the 6×6 cm light source for measurements under controlled lighting with any combination of red, green and, blue light. See Installing the bryophyte chamber for details. They bryophyte chamber includes the following items:

Description Quantity Part Number
Chamber 1 9968-281
Main Chamber Assembly 1 9968-197
Chamber Bottom Assembly 1 9968-263
Large Light Source Small Plant Adapter Kit 1 9968-190
Accessories and Spares Kit 1 9968-248
Mesh Screen 1 197-09025
Short Risers 4 170-04629
Short Riser Screws; M3-8 4 150-13642
Tall Risers 4 170-16503
Tall Riser Screws; M3-25 4 150-15454
Chamber Bottom Plate 1 9868-550
Chamber Bottom Screws; M4-12 4 150-14476
Flat Washers; #4 5/16 8 167-00155
Propafilm Kit 1 9964-151
O-ring; AS-150 BUNA-N 40 1 192-09262
O-ring; AS-041 VITON 75 1 192-05062
Chamber Feet 2 9968-253

Custom chamber adapter

Part Number 6800-19

The custom chamber interface is used to attach a custom-made chamber to the LI-6800 gas exchange system. The interface has a power supply connector for one powered peripheral, such as a mixing fan. See Installing the chamber adapter for details. The custom chamber adapter ships with the following items:

Description Quantity Part Number
Custom Chamber Block 1 9968-182
Thermocouple Adapter Cable 1 9968-162
Accessories and Spares Kit 1 9968-254
Auxiliary Power Cable 1 9968-260
Chamber Mounting Screws; M4×0.7 12 mm 6 150-14476
Swagelok Fittings; ¼"; 7/16 - 20 2 300-16268
Swagelok Ferrule Set' ¼"; Vinyl 2 300-05375
Stainless Steel Plug with O-ring 3 300-16271
90° Connector; ¼"; 5/16-24 2 300-16515
Bev-a-line tubing; ¼" diameter; 4.5 meters 1 220-01824
Swagelok Fittings; ⅜"; 7/16 - 20 2 300-16269
Swagelok Ferrule Set; ⅜"; Vinyl 5 300-16272
O-ring; 15×1.5 mm 2 192-16274
O-ring; 10×1.5 mm 1 192-14435
O-ring; 6×1.5 mm 1 192-14314

Insect respiration chamber

Part Number 6800-89

The insect respiration chamber is used to measure gas exchange from insects or small mammals. See Insect respiration chamber for details. The insect chamber includes the following items:

Description Quantity Part Number
Custom Chamber Adapter 1 9968-182
Sample Column Tube 1 9960-093
Stainless Steel Plug with O-ring 3 300-16271
Swagelok Fittings; ¼"; 7/16 - 20 2 300-16268
Swagelok Ferrule Set; ¼"; Vinyl 2 300-05375
Quick-connect union; ¼" 2 300-03123
Bev-a-line tubing; ¼" diameter; 4.5 meters 1 220-01824

Aquatic chamber

Part Number 6800-18

When equipped with the aquatic chamber, the LI-6800 can measure gas exchange and chlorophyll fluorescence from samples in aquatic suspension and wet samples. See Measuring assimilation from aquatic samples. The chamber package includes the following items:

Description Quantity Part Number
Chamber 1 9968-319
Chamber Stand 1 9968-329
Accessories and Spares Kit 1 9968-333
30 mL Syringe 1 869-13734
6" Flat-tipped 14-gauge Stainless Steel Needle 1 259-19172
Orifice Cleaning Tool 1 6568-681
Light Sensor Aperture 1 9868-669
Screws; M3×0.5 8 mm; for Perforated Block 2 150-13642
Screws; M3×0.5 20 mm; for H2O Equilibrator 4 150-14321
Screws; M3×0.5 10 mm; for Chamber to Fluorometer 2 150-14430
Screws; M3×00.5 6 mm; for Chamber Windows 8 150-16669
O-ring; 38×1.5 mm; for Chamber Window Interior 2 192-12027
O-ring; 35×1.5 mm; for Window Exterior 2 192-16851
O-ring; 10×1.5 mm; for Fill Port 1 192-14435
O-ring; 48×1.5 mm; for H2O Equilibrator 1 192-16680
O-ring; 16×1.5 mm; for Chamber-to-Head Manifold 2 192-18247
O-ring; 1.5×1.5 mm; for pH Probe Port 2 192-18702
O-ring; 18×1.5 mm; for Perforated Block 1 192-18703
Septa; 3/8"; Silicone/PTFE 5 300-08998
Hose barbs; 10-32 Threads 3 300-12287
Quick Connect Coupler; 0.165" Male Hose Barb 1 300-07124
Quick Connect Coupler with 0.165" Female Hose Barb 1 300-07125
PTFE Hydrophobic Filter; 1-2 µm; 47 mm Diameter 5 301-18701
PTFE Hydrophobic Filter; Custom 28 mm Diameter 5 6568-658

Soil chamber

Part Number 6800-09

The LI-6800 can measure CO2 efflux from soils when equipped with the soil chamber. See Measuring soil CO2 flux for details. The chamber package includes the following items:

Description Quantity Part Number
Chamber 1 9968-287
Head Mounting Bracket 1 9968-285
Stevens HydraProbe 1 900-19016
Custom Chamber Adapter Block 1 9968-182
Soil Collars 3 6581-044
Accessories and Spares Kit 1 9968-290
Disposable Air Filter 1 301-08119
O-ring; 6 ×1.5 mm 1 192-14314
O-ring; 15 ×1.5 mm 2 192-16274
Bev-a-line Tubing; 2 meters total 1 222-01824
Swagelok Ferrule Set' ¼"; Vinyl 2 300-05375
Swagelok Fittings; ¼"; 7/16 - 20 2 300-16268
Stainless Steel Plug with O-ring 4 300-16271
Elbow connector; 5/16 - 24 × 1/4 1 300-16515
Chamber gasket kit (see Accessories kit) 1 9981-198