- Reading PRTs or thermistors
- Battery packs available
- Best price/performance package
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Specifications
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1504
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Temperature Range†
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Any thermistor range
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Resistance Range
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0W to 1 MW, auto-ranging |
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Probe
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Thermistors
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Characterizations
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Steinhart-Hart thermistor polynomial
Callendar-Van Dusen: R0, a, d, and b
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Resistance Accuracy
(ppm of reading)
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0W to 5 KW: 0.5W
5 KW to 200 KW: 100 ppm
200 KW to 1 MW: 300 ppm |
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Temperature Accuracy†
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±0.002 °C at 0 °C
±0.002 °C at 25 °C
±0.004 °C at 50 °C
±0.010 °C at 75 °C
±0.020 °C at 100 °C
(Using 10 KW thermistor sensor, a=0.04.
Does not include probe uncertainty or characterization errors.)
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Operating Temperature Range
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13 °C to 33 °C
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Resistance Resolution
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0W to 10 KW: 0.01W
10 KW to 100 KW: 0.1W
100 KW to 1 MW: 1W |
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Temperature Resolution
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0.0001 °C
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Excitation Current
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2 and 10 mA, automatically selected
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Measurement Period
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1 second |
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Digital Filter
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Exponential, 0 to 60 seconds time constant (user selectable) |
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Probe Connection
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4-wire with shield, 5-pin DIN connector |
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Communications
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RS-232 serial standard
IEEE-488 (GPIB) optional
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Display
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8-digit, 7-segment, yellow-green LED; 0.5-inch-high characters |
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Power
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115 VAC (±10 %), 50/60 Hz, 1 A, nominal
230 VAC (±10 %), 50/60 Hz, 1 A, nominal, specify |
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Size (HxWxD)
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61 x 143 x 181mm (2.4 x 5.6 x 7.1 in) |
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Weight
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1.0 kg (2.2 lb.) |
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Probes from Hart
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5640-44, 5610-65
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Calibration
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Accredited NIST-traceable calibration provided |
| †Temperature ranges and accuracy may be limited by the sensor you use. |
One of Hart’s best-selling products is the Tweener thermometer, and there’s a reason. No other company, not one, has a thermometer that comes close to the performance and features of the Tweener for anywhere near its price.
1504 Tweener Thermistor Readout
If you need more accuracy in a limited temperature range, the Model 1504 Tweener gives it to you as a thermistor readout. Thermistors are less fragile than PRTs and less likely to be impacted by mechanical shock. Thermistors are more sensitive to temperature, have faster response times, and come in many shapes for different applications.
Typical accuracy of a 1504 is ±0.002 °C with a resolution of 0.0001 °C.
Software
With our 9934 LogWare, the Tweener models may be used for real-time data acquisition. Collect data and analyze it graphically or statistically. Additionally, Tweeners may be used as reference thermometers with our MET/TEMP II software.
Battery pack
Want to take your Tweener on the road? Order the 9320A Battery Pack. Our battery gives you 36 hours between charges, allowing you to take your work wherever you need.
Calibration choices
Each Tweener and its accompanying probe (sold separately) have their own individual calibration reports. Overall system error can be calculated from the individual errors, rendering the added cost of system data unnecessary. However, for those requiring it, system data is available at two or more temperatures of your choice. (See Calibration Model 1929-X )
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