PASCO CI-6549 User Manual

Teflon Sensor Covers

CI-6549

Instruction Sheet

012-05575B

Introduction

The PASCO Model CI-6549 Teflon* FEP Sensor Cover
(Package of 10) is designed to be used with a PASCO temper­ature sensing device (such as the CI-6605 Temperature Sen­sor, the RTD Temperature Sensor, the PS-2125 PASPORT
temperature sensor, or the Type K Thermocouple). (*Teflon is
DuPont’s registered trademark for its fluoropolymer resins.)

The cover is twelve inches long and has a 0.25” inside diame­ter. One end is sealed. The cover can be used to completely
cover the sensor when it is used in strong chemicals. Carefully
open the unsealed end and insert the sensor. (You may want to
cut the Teflon cover to a shorter length, depending on the sen­sor being used.)

The Chemical Resistance Classification for Teflon FEP is “E”
(excellent) for a wide range of chemicals (from Acetaldehyde
to Zinc Stearate), meaning that there is no damage during 30
days of constant exposure to the reagent at 20°C. (See the
Chemical Resistance Chart.)

NOTE: The Teflon cover may cause the
temperature sensing device to have a slower
response to changes in temperature. The following figure shows tem-

perature versus time for two Temperature Sensors, one with the Teflon
cover, plunged into ice water and then into boiling water.

With no

sheath

With Teflon

sheath

To improve response to temperature changes, make sure the
end of the sensor is in close contact with the inside of the
cover. One way to do this is to press the end of the sensor on a
hard surface such as a table top to flatten the cover against the
end of the sensor. The Teflon cover is reusable. Be sure to
rinse off all chemicals before storing the cover or sensor.

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Teflon Sensor Covers Chemical Resistance Chart

Chemical Resistance Chart

E – No damage during 30 days of constant exposure.

G – Little or no damage after 30 days of constant exposure to

This Chemical Resistance Chart is intended to be used as a

the reagent

general guide only. Since the ratings list is for ideal condi­tions, all factors affecting chemical resistance must be consid­ered. Teflon FEP is rated “EE” (excellent at 20°C and at 50°C)
for all the following chemicals except Fluorine and Perchloric

F – Some effect after 7 days of constant exposure to the
reagent. The effect may be crazing, cracking, loss of strength,
or discoloration.

Acid. It is rated “EG” for Fluorine and “GF” for Perchloric
Acid.

Acetaldehyde Acetamide, Sat. Acetic Acid, 5% Acetic Acid, 50%

Acetone Acetonitrile Acrylonitrile Adipic Acid

Alanine Allyl Alcohol Aluminum Hyroxide Aluminum Salts

Amino Acids Ammonia Ammonium Acetate, Sat Ammonium Glycolate

Ammonium Hydroxide Ammonium Oxalate Ammonium Salts n-Amyl Acetate

Amyl Chloride Aniline Benzaldehyde Benzene

Benzoic Acid, Sat. Benzyl Acetate Benzyl Alcohol Bromine

Bromobenzene Bromoform Butadiene n-Butyl Acetate

n-Butyl Alcohol sec-Butyl Alcohol tert-Butyl Alcohol Butyric Acid

Calcium Hydoxide, Conc. Calcium Hypochlorite, Sa Carbazole Carbon Disulfide

Carbon Tetrachloride Cedarwood Oil Cellosolve Acetate Chlorine, 10%

Chloroacetic Acid p-Chloroacetophenone Chloroform Chromic Acid, 50%

Cinnamon Oil Citric Acid Cresol Cyclohexane

DeCalin o-Dichlorobenzene p-Dichlorobenzene Diethyl Benzene

Diethyl Ether Diethyl Ketone Diethyl Malonate Diethylene Glycol

Dimethyl Formamide Dimethylsulfoxide 1,4-Dioxane Dipropylene Glycol

Ether Ethyl Acetate Ethyl Alcohol, 40% Ethyl Benzene

Ethyl Benzoate Ethyl Butyrate Ethyl Chloride, liquid Ethyl Cyanoacetate

Ethyl Lactate Ethylene Chloride Ethylene Glycol Ethylene Oxide

Fluorides Fluorine (EG) Formaldehyde, 40% Formic Acid, 80-100%

Freon TF Fuel Oil Gasoline Glacial Acetic Acid

Glycerine n-Heptane Hexane Hydrochloric Acid, 35%

Hydrofluoric Acid, 48% Hydrogen Peroxide, 90% Isobutyl Alcohol Isopropyl Acetate

Isopropyl Alcohol Isopropyl Benzene Kerosene Lactic Acid, 85%

Methoxyethyl Oleate Methyl Alcohol Methyl Ethyl Ketone Methyl Isobutyl Ketone

Methyl Propyl Ketone Methylene Chloride Mineral Oil Nitric Acid, 70%

Nitrobenzene n-Octane Orange Oil Ozone

Perchloric Acid (GF) Perchloroethylene Phenol, Crystals Phosphoric Acid, 85%

Pine Oil Potassium Hydroxide, Conc Propane Gas Propylene Glycol

Propylene Oxide Resorcinol, Sat. Salicylaidehyde Salicylic Acid

2

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