RET-2 - Rectal probe for rats. For fast intermittent measurements. Smooth ball tip. Stainless steel shaft - 1" long, 0.59" dia., tip dia. .125". 5 ft. lead. Max Temp. 125°C. Time constant 0.8 secs. Not Isolated.
 
RET-3 - Rectal probe for mice, etc. Same as RET-2, with shaft 3/4" long. .028" dia. Tip diameter .065". Time constant 0.5 secs. Not Isolated.