Secondary PRT with Calibration Options - 5608 and 5609

Features

^[1]"Accuracy" is a difficult term when used to describe a resistance thermometer. The simplest way to derive basic "accuracy" is to combine the probe drift specification and calibration uncertainty with readout accuracy at a given temperature.

^[2]Three thermal cycles from min to max temp, includes hysteresis, 99.9 % confidence

^[3]After 100 hours at max temp, 99.9 % confidence

^[4]Per ASTM E 644

Calibration Uncertainty for optional calibrations
	1922	1923	1924
–197 °C	0,010 °C	0.025 °C	0.025 °C
–38 °C	0.009 °C	0.025 °C	0.025 °C
0 °C	0.009 °C	0.025 °C	0.025 °C
157 °C	0.014 °C	0.030 °C	0.045 °C
232 °C	0.016 °C	0.030 °C	0.045 °C
420 °C	0.025 °C†	0.035 °C	0.045 °C
660 °C	n/a	0.050 °C	0.050 °C
Note: Uncertainties depend on lab practices, available information and equipment. A selection of calibrations are available to meet customer needs. 1930 calibrations are for complete thermometer systems. 1923 and 1924 calibrations are for PRTs only. As of 2008, model 1923 and 1930 calibrations are accredited. 1924 calibrations have not yet been accredited. Lab code 200348-0 †1922-4-R uncertainties are ± 0.025 °C at 500 °C.

If you want a very stable thermometer from –200 °C to 670 °C and are particular about the calibration, then look no further than our 5609 Secondary Reference PRT. Its short-term stability at the triple point of water is only ± 10 mK and its one-quarter inch (6.23 mm) diameter lets you get accurate measurements in only 100 mm of immersion.

The 5608 is also a ± 10 mK probe at the triple point of water, but its one-eighth inch (3.18 mm) diameter gets you accurate measurements from –200 °C to 500 °C with only 80 mm (3.1 in) of immersion. With multiple sheath length options on both of these probes, you can find the dimensions that are just right for your specific application. The 5608 comes with a one-eighth inch (3.18 mm) diameter sheath in lengths of 9 inches or 12 inches. The 5609 comes with a one-quarter inch (6.35 mm) diameter sheath in lengths of 12 inches, 15 inches, and 20 inches; or with a 6 mm diameter in lengths of 300 mm, 400 mm, or 500 mm.

When looking for improved response time and reduced stem effect in shallow immersion, look for small diameter probes, because the measurement error called stem effect is caused by the diameter of the stem rather than the length of the stem.

Both of these probes have Inconel™ sheaths and are made using a special manufacturing process, giving them great precision over a wide temperature range. The sensors for these probes are reference-grade platinum and feature four-wire connections with less noisy measurements than two-wire counterparts.

These probes come with a certificate of compliance to ensure the meet their specifications. If you’d like, you can also order a NVLAP-accredited calibration from our laboratory, lab code 200348-0. On the report of calibration, you’ll get the test data and the ITS‑90 calibration coefficients that you can easily input into any Hart thermometer. If you order your probe with an INFO-CON connector, we’ll program the coefficients directly into your connector, which loads the coefficients for you when you plug it into our 1522 Handheld Thermometer.

Call today for your free quote.