Hart Scientific Model 5612 SPRT Temperature Probe

Need a durable but accurate sensor for use in the factory, field, or lab?
The Model 5614 Secondary Temperature Standard is the answer.

The 5614 is a Platinum Resistance Thermometer (PRT) that's 12 inches
long with an Inconel 600 sheath and a 1/4" outside diameter. It is designed
to be used as a transfer device from the highest laboratory standards to industrial
or second-tier lab locations. It has short-term accuracy of +/-0.02°C at 200°C.

The element is constructed of reference-grade platinum wire (99.999% pure)
for excellent stability. The wire is wound in a coil and placed in a mandrel
where it is uniformly supported in a manner to virtually eliminate hysteresis.
The electrical configuration is a four-wire current-potential hookup to eliminate
effects of lead-wire resistance.

These Inconel-sheathed probes have a partially supported sensing element,
making them more durable than SPRTs. The element is protected in an
ultrahigh-purity ceramic case with a hermetic glass seal to improve output
stability by locking out moisture and contaminants.

This probe comes calibrated in accordance with ITS-90, which makes it compatible
with many excellent readout devices, including Hart's family of advanced readout
devices. It bridges the gap between a 100-ohm industrial RTD and an SPRT.

For those needing faster thermal response, or where diameter and immersion
depth are problems, order the 6-inch 5613 or the 9-inch 5612. These probes
are excellent reference probes for comparison calibrations in a Hart dry-well.

A printout of sensor resistance is provided in 1°C increments for each probe.
The 5614 and 5612 are calibrated from -196°C to 420°C. The 5613 is calibrated
to 300°C.

We've tested many of the probes on the market. We've used them in our
manufacturing facility and tested them in the lab, and this is an excellent secondary
standards PRT. Other instruments on the market are priced much higher,
have lower stability, or have lower quality.

Remember, these instruments are inexpensive and have excellent durability.
Each probe is individually calibrated and includes a report of calibration
from the manufacturer.