For secondary level performance with full ITS-90 calibration, Hart’s 5618B series PRTs are an excellent choice for critical temperature measurements. Featuring a 3.2 mm diameter (1/8 in) sheath, these industrial standards probes have reduced response time without compromising precision. This small diameter 5618A probe works well in many applications where immersion depth is limited. Larger diameter probes give more measurement error in short immersion depth applications because they conduct more heat between ambient and the sensor.
With each probe you will receive a full NVLAP-accredited calibration report. On the report you’ll get the test data and the ITS-90 calibration coefficients that you can easily input into your Hart thermometer. If you are using a 1521 Handheld Thermometer readout, we’ll program the coefficients directly into your INFO-CON connector.
The 5618B is also a great probe to use for calibrating your Hart 9132 or 9133 infrared calibrators. In fact, these IR black body heat sources were designed to be calibrated with this type of probe. Now you can calibrate these targets in your own lab!
For use from –200 °C to 500 °C (the six-inch model goes to 300 °C), you won’t find a better industrial standard in this configuration than our 5618B. We recommend using the 5618B PRTs with the 1521, 1522, 1502A, 1529, or 1560 thermometer readouts.
Nominal 100W at 0 °C
0.003923W/W/ °C nominal
–200 °C to 500 °C
±0.1 °C when used periodically to 500 °C
22 AWG Teflon, 6’
Less than 0.01 °C at 0 °C when using –196 °C and 420 °C as the end points.
9 seconds max for 63.2 %
Less than 25 mV at 420 °C
Includes NVLAP-accredited calibration w/ITS-90 coefficients, R vs. T values in 1 °C increments
|5618B-12: 305 mm L x 3.2 mm dia. (12 x 1/8 in)|
5618B-9: 229 mm L x 3.2 mm dia. (9 x 1/8 in)
5618B-6: 152 mm L x 3.2 mm dia. (6 x 1/8 in)
Probe Accuracy (includes calibration uncertainty and short-term stability)
±0.05 °C over entire range
305 mm (12 in) Small Diameter Probe
229 mm (9 in) Small Diameter Probe
152 mm (6 in) Small Diameter Probe
Probe Carrying Case
X = termination. Specify “B” (bare wire), “D” (5-pin DIN for Tweener Thermometers), “G” (gold pins), “I” (INFO-CON for 1521 or 1522 Handheld Thermometers), “J” (banana plugs), “L” (mini spade lugs), “M” (mini banana plugs), or “S” (spade lugs).