Richards Thermocouple and Temperature Sensor Catalog 16

Manufacturing, Engineering and Sales Since 1938

ACH

Phone: 617.527.4385 Fax: 617.964.3746 Email: sales@asrichards.com

Thermocouple Heads - Black Nylon, White Polypropylene, & Gray Delrin

Plastic Thermocouple Head Material Characteristics - √ Delrin© (Grey): Delrin is a grey pigmented acetal homopolymer made from Dupont resin. It is resistant to most acids, alkalies, sea water and has a maximum service temperature rating of 275°F or 135°C . Delrin is not FDA approved for sanitary applications. √ Nylon (Black): Nylon provides excellent electrical insulation and chemical resistance. It has a maximum service temperature rating of 350°F or 176.6°C Nylon is not FDA approved for sanitary applications. √ Polypropylene (Black): Black Polypropylene is not approved for sanitary applications. It has excellent resistance to organic solvents, degreasing agents, acids, alkalies and most chemicals. Polypropylene has poor resistance to aliphatic and clorinated solvents. Polypropylene has a maximum service temperature rating of 198°F or 92.2°C and will start to distort its shape after 220°F or 104.4°C . √ Polypropylene (White): White Polypropylene is approved for sanitary applications. It has excellent resistance to organic solvents, degreasing agents, acids, alkalies and most chemicals. Polypropylene has poor resistance to aliphatic and clorinated solvents. Polypropylene has a maximum service temperature rating of 198°F or 92.2°C and will start to distort its shape after 220°F or 104.4°C .

NH - Nylon Head - Black, Screw Cover Part Process Conduit Block Terminals

Dimensions

Number

Thread Thread Included

Wires

NEMA Rating

Figure

Height 3” or 76.2 mm Width 2.8” or 71.1 mm Weight 3.9 oz. or 110 g.

1

NPT 1/2”

NPT 1/2”

NHS

AWTS

Two / 2

NFPA Rating None Temperature Rating: 350ºF

NHD

1/2”

1/2”

AWTD

Four / 4

NH

PPH - Plastic Head - White FDA Polypropylene or Delrin, Screw Cover Part Process Conduit Terminals Temperature Dimensions

Number

Thread Thread

Wires

Rating

NEMA Rating

Figure

3

White FDA Polypropylene

NPT

NPT

198°F or 92.2°C

Height 3.2” or 81.3 mm

PPH

1/2”

3/4”

Three / 3

Non – FDA Delrin ©

Width 2.8” or 71.1 mm

275°F or 135°C

DH

1/2”

3/4”

Three / 3

NFPA Rating 4x

PPH & DHD

PPSH - Plastic Sanitary Head - White FDA Polypropylene or Delrin, Screw Cover Part Process Conduit Block Terminals Dimensions Temperature

Number

Thread Thread Included

Wires

Rating

NEMA Rating

Figure

White FDA Polypropylene

2

NPT

NPT

198°F or 92.2°C

Height 3.2” or 81.3 mm

PPSHD

1/2”

1/2”

PPSD

Four / 4

Non - FDA Delrin ©

Width 2.8” or 71.1 mm

275°F or 135°C

DSHD

1/2”

1/2”

PPSD

Four / 4

NFPA Rating 4x

PPSH & DSHD

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