Type R & S thermocouple are the most popular rare material thermocouple types. They are similar in conductor construction. The main different is that Type R has a higher percentage of Rhodium than the Types S, which makes it more expensive.

Technical Details Continuous :

• (Type R) 0 to +1600°C

• (Type S) 0 to +1600°C

Short Term:

(Type R) -50 to +1700°C

(Type S) -50 to +1750°C

Material :

Type R

Platinum/Rhodium (87%Pt, 13%Rh) (+Positive Leg)

Platinum (100%Pt)(-Negative Leg)

Type S

Platinum/Rhodium (90%Pt, 10%Rh) (+Positive Leg)

Platinum (100%Pt)(-Negative Leg)

Type R & S Thermocouple Designs:

Thermocouple can come in a variety of designs suited to different applications.

1. Type R & S with Ceramic Sheaths - High temperature design with ceramic protection sheath.

2. Type R & S with Metal Sheaths - High temperature design with metal protection sheath.