Rockwell Automation 875 Capacitive Proximity Sensor - Manual (Page 4)

Dielectric Constants of Industrial Materials
This is a partial listing only. For more information, refer to the
CRC Handbook of Chemistry and Physics (CRC Press), the
CRC Handbook of Tables for Applied Engineering Science
(CRC Press), or other applicable sources.
Acetone 19.5
Acrylic Resin 2.7–4.5
Air 1.000264
Alcohol 25.8
Ammonia 15–25
Aniline 6.9
Aqueous Solutions 50–80
Bakelite 3.6
Benzene 2.3
Carbon Dioxide 1.000985
Carbon Tetrachloride 2.2
Celluloid 3.0
Cement Powder 4.0
Cereal 3–5
Chlorine Liquid 2.0
Ebonite 2.7–2.9
Epoxy Resin 2.5–6
Ethanol 24
Ethylene Glycol 38.7
Fired Ash 1.5–1.7
Flour 1.5–1.7
Freon R22 & 502 (liquid) 6.11
Gasoline 2.2
Glass 3.7–10
Glycerine 47
Marble 8.0–8.5
Melamine Resin 4.7–10.2
Mica 5.7–6.7
Nitrobenzine 36
Nylon 4–5
Oil Saturated Paper 4.0
Paraffin 1.9–2.5
Paper
1.6–2.6
Perspex 3.2–3.5
Petroleum 2.0–2.2
Phenol Resin 4–12
Polyacetal 3.6–3.7
Polyamide 5.0
Polyester Resin 2.8–8.1
Polyethylene 2.3
Polypropylene 2.0–2.3
Polystyrene 3.0
Polyvinyl Chloride Resin 2.8–3.1
Porcelain 4.4–7
Powdered Milk 3.5–4
Press Board 2–5
Quartz Glass 3.7
Rubber 2.5–35
Salt 6.0
Sand 3–5
Shellac 2.5–4.7
Shell Lime 1.2
Silicon Varnish 2.8–3.3
Soybean Oil 2.9–3.5
Styrene Resin 2.3–3.4
Sugar 3.0
Sulphur 3.4
Teflon 2.0
Toluene 2.3
Transformer Oil 2.2
Turpentine Oil 2.2
Urea Resin 5–8
Vaseline 2.2–2.9
Water 80
Wood, Dry 2–7
Wood, Wet 10–30
Capacitive Proximity Sensor Accessories
Mating Cables
The following are straight connector, 2-meter cables. Refer to
sensor catalog for other types.
AC Micro-Connector 871A–CS3–R2
DC Micro-Connector 871A–CS4–D2
DC Pico-Connector 871A–CS3–P2
Mounting Wells
12mm Delrin w/external thread 871A–WTD12
12mm Teflon w/external thread 871A–WTT12
18mm Delrin w/external thread 871A–WTD18
18mm Teflon w/external thread 871A–WTT18
30mm Delrin w/external thread 871A–WTD30
30mm Teflon w/external thread 871A–WTT30
30mm polyethylene, bolt-on type 871A–WSPE30
34mm Delrin w/external thread 871A–WTD34
34mm Teflon w/external thread 871A–WTT34
Mounting Brackets
Spring Return, stainless steel
12mm 871A–BXS12
18mm 871A–BXS18
30mm 871A–BXS30
Spring Return, anodized aluminum
12mm 871A–BXN12
18mm 871A–BXN18
30mm 871A–BXN30
Right Angle, stainless steel
12mm 871A–BRS12
12mm w/spring return bracket 871A–BRS22
18mm 871A–BRS18
18mm w/spring return bracket 871A–BRS30
30mm 871A–BRS30
30mm w/spring return bracket 871A–BRS47
Right Angle, nickel-plated brass
12mm 871A–BRN12
12mm w/spring return bracket 871A–BRN22
18mm 871A–BRN18
18mm w/spring return bracket 871A–BRN30
30mm 871A–BRN30
30mm w/spring return bracket 871A–BRN47
Clamp, plastic
12mm 871A–BP12
18mm 871A–BP18
30mm 871A–BP30
34mm 871A–BP34
Swivel/Tilt, plastic
30mm 60–2439
End Caps, plastic (unshielded models only)
12mm 871A–KP12
18mm 871A–KP18
30mm 871A–KP30
Conduit Adaptors, nickel-plated brass
12mm 871C–N13
18mm 871C–N19
30mm 871C–N31
Publication 46803–057–01(A)
March 1996
Printed in USA