PT8xx Series Temperature Probes
Connect directly to any Pace Data Logger. All probes utilize a precision
10k ohm thermistor.
Select Thermistor "B" (B.rvt) scaling for all PT8xx series probes.
PT8xx Series Temperature Probes
Connect up to eight probes to the XR5-SE Data Logger, and up to four probes to the XR440 or XR450 Data Logger.
Common to all PT8xx series Probes
- Resolution 0.025°C at 25°C
- No calibration required
- Probe cables may be extended using ordinary copper wire.
PT840
Miniature high-accuracy temperature sensor has low thermal mass for fast response. Not recommended for continuous immersion in water.
| Temperature range with highest accuracy | 0 to 50°C (32 to 122°F) |
| Accuracy | ±0.15°C from 0 to 50°C (32 to 122°F) |
Total system accuracy (Pace Logger + PT840 Probe) |
±0.2°C from 0 to 50°C |
| Rated temperature range | -40°C to 70°C (-4°F to 158°F)
Intermittent duty to 105°C (221°F) |
| Time constant in still air | 15 seconds |
| Time constant in still water | 2 seconds |
| Probe dimensions | 0.080 inch diameter (2.03 mm), 0.375 inch length (9.5 mm) |
| Probe construction | Precision thermistor epoxy potted in molded plastic sheath |
| Lead length | 3 feet (0.91 meter) |
| Wire gauge | 28 AWG |
| Wire insulation | PVC |
PT840 price: $25.
PT820
The PT820 is excellent for surface temperature measurement and general temperature measurement applications.
| Operating Temperature Range | -40°C to 125°C (-40°F to 257°F) |
| Sensor Accuracy |
At -40°C (-40°F): ±0.61°C (±1.1°F) At -20°C (-4°F): ±0.47°C (±0.85°F) At 0°C (32°F): ±0.44°C (±0.8°F) At 25°C (77°F): ±0.44°C (±0.8°F) At 85°C (158°F): ±0.61°C (±1.1°F) At 125°C (257°F): ±0.76°C (±1.4°F) |
Total system accuracy (Pace Logger + PT820 Sensor) |
At -40°C (-40°F): ±0.93°C (±1.7°F) At -20°C (-4°F): ±0.55°C (±1.0°F) At 0°C (32°F): ±0.47°C (±0.85°F) At 25°C (77°F): ±0.47°C (±0.85°F) At 60°C (140°F): ±0.56°C (±1.0°F) At 85°C (158°F): ±0.84°C (±1.5°F) At 125°C (257°F): ±1.6°C (±2.9°F) |
| Time constant | 7 seconds |
| Sensor dimensions | 0.39 inch width (10 mm), 0.79 inch length (20 mm) |
| Mounting hole | 0.205 inch diameter (5.2 mm) |
| Sensor construction | Precision thermistor epoxy potted in tin plated copper ring terminal |
| Lead length | 19.7 inches (500 mm) |
| Lead wire details | 28 AWG XLPE Insulated tin plated copper |
PT820 price: $15.
PT860
Rugged nickel plated brass probe with 10 FT Cable. Suitable for HVAC and general temperature applications. Excellent for applications subject to moisture due to condensation. Suitable for repeated freeze/thaw cycles in refrigeration, HVAC and applicance industries. Not recommended for continuous (long-term) immersion in water.
| Temperature range | -40 to 125°C (-40 to 257°F) |
| Probe Accuracy | ±0.2°C from 0 to 70°C (32 to 158°F) |
Total system accuracy (Pace Logger + PT840 Probe) |
±0.25°C from 0 to 70°C (±0.45°F from 32 to 158°F) |
| Time constant (typical) in stirred oil bath | 6 seconds |
| Probe dimensions | 0.25 inch diameter (6.35 mm) by 1.75 inch length (44.45 mm) |
| Probe construction | Precision thermistor, epoxy potted in nickel plated brass probe |
| Cable length | 10 feet (3.05 meters) |
| Cable type | 22 AWG, PVC insulated zipcord |
PT860 price: $75.
Extension Cable
Extension cable can be spliced to any of the above probes. We recommend 24 or 22 gauge two-conductor stranded copper cable for extensions of up to 100 feet (30 meters). Acceptable splicing methods include wire nuts, crimp connectors, hand twisting and taping, or solder.
All Temperature Sensors and Probes
