Fluke 5610/5611 Temperature & Reference Thermistor Probes - Choice of Termination

These temperature probes are available in a variety of sheath materials appropriate for your specific application. The thermistors have small diameters and very small sensing elements, which means they require far less immersion than a PRT to avoid errors caused by the stem effect. Termination ranges available from B to S. Termination Key

PTFE Encapsulated Thermistor

The 5611T is an especially versatile PTFE-coated thermistor probe. With a PTFE encapsulated tip that is just 3 mm (0.12 in) in diameter and a PTFE coating that makes it impervious to most liquids, the PTFE Probe is handy for measuring in a wide variety of applications, including bio-pharmaceuticals. The 5611T's thermistor bead is encapsulated in a Mylar sleeve that is encapsulated inside a PTFE sleeve. The PTFE sleeve is then melted around the PTFE-insulated cable, forming a moisture-proof seal.

Stainless Steel Sheathed Thermistor

The stainless steel metal-sheath probes include the 5610-6 and 5610-9 immersion probes. These probes are great for measuring in air, liquid, or soil.

Silicone Coated Thermistor

With a diameter at the tip of just 1.5 mm (0.06 in), the 5611A's tip has the smallest diameter of any of our secondary reference thermistors and can fit nearly anywhere. Its faster response time, flexible sheath, and silicone coating make the 5611A great for use in many applications. However, applications involving silicone oil could damage the thermistor and should be avoided.

Higher Performance

The secondary reference thermistors have small diameters and very small sensing elements, which means they require far less immersion than a PRT to avoid errors caused by the stem effect. Self-heating is usually negligible, giving them an advantage when taking measurements in the air. Their small size also improves response time, allowing measurements to be taken more quickly.

If your application involves frequent handling, you'll be especially interested to know thermistors are less susceptible to mechanical shock than PRTs. The bottom line may be better accuracy in fieldwork. Additionally, higher base resistance and larger resistance coefficients make it easier to achieve precision readings with thermistors, so better resolution and accuracy are possible for a lower cost. All of these thermistors have a negative temperature coefficient of resistance (NTC).

Readouts

These probes come in a complete assembly ready for use, and each works well with the uncertainties of our thermometer readouts: the 1504 Tweener, the 1523 and 1524 Handheld Thermometers, the 1529 Chub-E4, the 1560 Black Stack, and the 1575A and 1590 Super-Thermometers.

These probes provide the most accurate readings when coupled with a 2563 Standards Thermistor Module or 1590 Super-Thermometer, but they are most portable when used with a handheld reference thermometer.

Calibrated Accuracy

What's more, the Secondary Reference Series Thermistors are accurate to ± 0.01 °C and cover the temperature range of 0 °C to 100 °C. They come with a NIST-traceable calibration and a resistance-versus-temperature table printed in 0.1 °C increments that can be interpolated to 0.0001 °C.

Key Features

• Temperature probes with short-term accuracy to ± 0.01 °C; one-year drift < ± 0.01 °C
• Flexible PTFE and silicone-coated fast-response models
• Rugged polished stainless steel sheaths

Product Ranges

• Fluke 5610-6-B Temperature & Thermistor Probe, 1/8 × 6" Stainless Steel
• Fluke 5610-6-D Temperature & Thermistor Probe, 1/8 × 6" Stainless Steel
• Fluke 5610-6-G Temperature & Thermistor Probe, 1/8 × 6" Stainless Steel
• Fluke 5610-6-J Temperature & Thermistor Probe, 1/8 × 6" Stainless Steel
• Fluke 5610-6-L Temperature & Thermistor Probe, 1/8 × 6" Stainless Steel
• Fluke 5610-6-M Temperature & Thermistor Probe, 1/8 × 6" Stainless Steel
• Fluke 5610-6-P Temperature & Thermistor Probe, 1/8 × 6" Stainless Steel
• Fluke 5610-6-S Temperature & Thermistor Probe, 1/8 × 6" Stainless Steel
• Fluke 5610-9-B Temperature & Thermistor Probe, 1/8 × 9" Stainless Steel
• Fluke 5610-9-D Temperature & Thermistor Probe, 1/8 × 9" Stainless Steel
• Fluke 5610-9-G Temperature & Thermistor Probe, 1/8 × 9" Stainless Steel
• Fluke 5610-9-J Temperature & Thermistor Probe, 1/8 × 9" Stainless Steel
• Fluke 5610-9-L Temperature & Thermistor Probe, 1/8 × 9" Stainless Steel
• Fluke 5610-9-M Temperature & Thermistor Probe, 1/8 × 9" Stainless Steel
• Fluke 5610-9-P Temperature & Thermistor Probe, 1/8 × 9" Stainless Steel
• Fluke 5610-9-S Temperature & Thermistor Probe, 1/8 × 9" Stainless Steel
• Fluke 5611A-11-B Secondary Reference Thermistor Probe, Silicone Bead
• Fluke 5611A-11-D Secondary Reference Thermistor Probe, Silicone Bead
• Fluke 5611A-11-G Secondary Reference Thermistor Probe, Silicone Bead
• Fluke 5611A-11-J Secondary Reference Thermistor Probe, Silicone Bead
• Fluke 5611A-11-L Secondary Reference Thermistor Probe, Silicone Bead
• Fluke 5611A-11-M Secondary Reference Thermistor Probe, Silicone Bead
• Fluke 5611A-11-P Secondary Reference Thermistor Probe, Silicone Bead
• Fluke 5611A-11-S Secondary Reference Thermistor Probe, Silicone Bead
• Fluke 5611T-B Secondary Reference Thermistor Probe, Teflon
• Fluke 5611T-D Secondary Reference Thermistor Probe, Teflon
• Fluke 5611T-G Secondary Reference Thermistor Probe, Teflon
• Fluke 5611T-J Secondary Reference Thermistor Probe, Teflon
• Fluke 5611T-L Secondary Reference Thermistor Probe, Teflon
• Fluke 5611T-M Secondary Reference Thermistor Probe, Teflon
• Fluke 5611T-P Secondary Reference Thermistor Probe, Teflon
• Fluke 5611T-S Secondary Reference Thermistor Probe, Teflon

• Termination Key:
• B (Bare wire)
• D (5-pin DIN for Tweener Thermometers)
• G (Gold pins)
• J (Banana plugs)
• L (Mini spade lugs)
• M (Mini banana plugs)
• P (INFO-CON for 1523 or 1524)
• S (Spade lugs)