All probes feature a 316 stainless steel sheath with 5-foot PVC coiled cable with miniconnectors. Small diameter probes measure just 0.062” for fast response. Great with liquids, gases, and semi-solids. Probe length: 4”. Overall length: 9 1/2”. Time constant: 0.2 second. Teflon-Coated probes are ideal with corrosive liquids and atmospheres. Stainless steel sheath is coated with Teflon PTFE. Not recommended for use below 32°F (0°C). Diameter: 0.145”. Probe length: 10”. Overall length: 15 1/2”. Time constant: 4 seconds. Heavy-Duty probes are designed for rugged applications. Reduced diameter tip of 1/4” for faster response. Time constant: 3 seconds.