Our oxygen sensor stainless steel probes with an embedded thermistor are designed for monitoring of dissolved oxygen in Organic solvents, Alcohols, fuels, hydraulic fluids (petroleum products) with a response time about 3 Seconds.  It is 7" (17.78 cm) long and it has 1000/2000 micron glass fiber.

Factory calibration is included. 

Available with two different ODs: 

5/32" (0.156", 3.97 mm) OD  

1/4" (0.250", 6.35 mm) OD 

12/32" (0.375",9.53 mm) OD