(25) Open Face Charcoal Canisters | 4"
(Bulk Packed)
LAB FEES INCLUDED! Short Term (48-96 hour test period) Easy to use! Each canister has a unique serial number for tracking. Results
will be emailed and are available online typically within 24 to 36 hours of receipt in our lab. EPA CERTIFIED!
Bulk orders include:
- (25) 4" pre-weighed test canisters (unopened canisters have a shelf life of 2 years)
- Instruction/information sheet
- laboratory processing
Open Face Charcoal Canisters
The open face charcoal canister has been calibrated at our laboratory for a two to five day exposure with a recommended exposure of two to three days. Humidity effects are controlled by correcting for moisture gain during analysis.
Specifications:
The canister is all metal of the Ellisco type of eight ounce capacity. The nominal dimensions of the canister are 4 inches in diameter and1 1/2 inches deep. The canister contains 70 +/- 1 grams of Calgon type 1193-coconut shell charcoal. The charcoal is 8 x 16 mesh and has a maximum radioactivity for gamma emitters of 0.2 pCi/g. The charcoal is held firmly in place by a screen of 30 - 50% openness and a borosilicate glass fiber filter with a basis weight of 22.9 grams / square meter. The screen and filter are held in place by an internally expandable ring of sufficient stiffness to hold the charcoal in place during handling including a drop from 3 - 4 feet onto a concrete floor. The canister is covered with a metal lid with a circular piece of foam material attached to the inner surface and sealed with vinyl tape.
Analysis:
Canisters are securely placed within a lead-shielded chamber in contact with a sodium iodide (NaI) crystal. The gamma radiation from the elements adsorbed onto the charcoal causes a light signal in the NaI crystal, which is electrically enhanced and counted using a ratemeter. Background counts are subtracted and the net counts are entered into a formula with other relevant data yielding quantitative results stated in picoCuries per Liter (pCi/L).
When ordering, please tell us in the comment section (found later in checkout process) how you intend to use your test kits. It may help us with packaging or providing the proper forms. Thanks
