Fluke Calibration 1502A/1504 Thermometer Readout

Fluke Calibration 1502A Thermometer Readout is rated 4.0 out of 5 by 1.
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  • Fluke Calibration 1502A/1504 Thermometer Readouts

Key features

  • 1502A: accuracy up to ±0.006 °C.
  • 1504: accuracy up to ±0.002 °C plus ability to measure thermistor temperature sensors.
  • 1502A: covers –200°C to 962°C
  • 1504: covers 0 to 100°C
  • Can take readings up to twice per second, making the calibration process faster.

Product overview: Fluke Calibration 1502A/1504 Thermometer Readout

Precision thermometer readouts for laboratory and field use

1502A Tweener PRT Readout

The Fluke Calibration 1502A Tweener offers precision temperature measurement with:

  • Accuracy up to ±0.006 °C
  • Resolution of 0.001 °C across the entire range
  • Compatibility with 100-ohm, 25-ohm, and 10-ohm RTD probes
  • Smallest unit in its class, ideal for field or bench use
  • Optional 9320A Battery Pack for full portability

Advanced Features

  • Programmable to match a probe’s constants for maximum linearity and accuracy
  • Displays temperature in °C, °F, K, or resistance in ohms
  • Reads standard industrial IEC-751 / “385 ALPHA” RTDs with no programming required
  • Accepts ITS-90 subranges 4 and 6–11, with formulas built into firmware
  • Calibration is done digitally via front-panel—no need to open the device
  • Comes with RS-232 interface; optional IEEE-488 interface available

1504 Tweener Thermistor Readout

Need higher precision in a narrower temperature range? The Model 1504 Tweener offers:

  • Accuracy up to ±0.002 °C
  • Resolution of 0.0001 °C
  • Designed specifically for thermistors—more robust, shock-resistant sensors with faster response times
  • Ideal for applications requiring high sensitivity and reliability in limited temperature spans

Calibration and Probe Integration

  • Each Tweener and its compatible probe (sold separately) include individual calibration reports
  • System data is available upon request at two or more temperatures for high-precision needs (Calibration Model 1929-X)
  • Users can calculate system accuracy using individual device specifications—no need to purchase system-level data unless required

Software Compatibility

Enhance your workflow with Fluke software tools:

  • 9934 LogWare: Real-time data acquisition, graphing, and analysis
  • MET/TEMP II: Use Tweeners as reference thermometers for automated calibrations

Optional Battery Pack

Take your Tweener on the road with the 9320A Battery Pack:

  • Provides up to 36 hours of portable operation between charges
  • Perfect for fieldwork or locations without direct power access

Specifications: Fluke Calibration 1502A/1504 Thermometer Readout

Specifications1502A1504
Temperature Range−200 °C to 962 °C (−328 °F to 1764 °F)Any thermistor range
Resistance Range0 Ω to 400 Ω, auto-ranging0 Ω to 1 MΩ, auto-ranging
ProbeNominal RTPW: 10 Ω to 100 Ω
RTD, PRT, or SPRT
Thermistors
CharacterizationsITS-90 subranges 4, 6, 7, 8, 9, 10, and 11
IPTS-68: R0, a, d, a4, and c4
Callendar-Van Dusen: R0, a, d, and b
Steinhart-Hart thermistor polynomial
Callendar-Van Dusen: R0, a, d, and b
Resistance Accuracy
(ppm of reading)
0 Ω to 20 Ω: 0.0005 Ω
20 Ω to 400 Ω: 25 ppm
0 Ω to 5 KΩ: 0.5 Ω
5 KΩ to 200 KΩ: 100 ppm
200 KΩ to 1 MΩ: 300 ppm
Temperature Accuracy±0.004 °C at −100 °C
±0.006 °C at 0 °C
±0.009 °C at 100 °C
±0.012 °C at 200 °C
±0.018 °C at 400 °C
±0.024 °C at 600 °C
±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 KΩ thermistor sensor, a=0.04. Does not include probe uncertainty or characterization errors.)
Operating Temperature Range16 °C to 30 °C13 °C to 33 °C
Resistance Resolution0 Ω to 20 Ω: 0.0001 Ω
20 Ω to 400 Ω: 0.001 Ω
0 Ω to 10 KΩ: 0.01 Ω
10 KΩ to 100 KΩ: 0.1 Ω
100 KΩ to 1 MΩ: 1 Ω
Temperature Resolution0.001 °C0.0001 °C
Excitation Current0.5 and 1 mA, user selectable, 2 Hz2 and 10 µA, automatically selected
Measurement Period1 second
Digital FilterExponential, 0 to 60 seconds time constant (user selectable)
Probe Connection4-wire with shield, 5-pin DIN connector
CommunicationsRS-232 serial standard
IEEE-488 (GPIB) optional
Display8-digit, 7-segment, yellow-green LED; 0.5-inch-high characters
Power115 VAC (±10 %), 50/60 Hz, 1 A, nominal
230 VAC (±10 %), 50/60 Hz, 1 A, nominal, specify
Size (HxWxD)61 x 143 x 181mm (2.4 x 5.6 x 7.1 in)
Weight1.0 kg (2.2 lb.)
Probes from Fluke Calibration5615, 5627, 5626, 5628, 56225640-44, 5610-65
CalibrationISO 17025-accredited calibration provided
Temperature ranges and accuracy may be limited by the sensor you use.

Models: Fluke Calibration 1502A/1504 Thermometer Readout

Fluke 1502A
Fluke Calibration 1502A-156 Thermometer Readout
−200°C to 962°C (−328°F to 1764°F)

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1502A-2506
Tweener PRT Readout, with IEEE-488

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Fluke 1504
Fluke Calibration 1504 Thermometer Readouts
Any thermistor range

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1504-2506
Tweener Thermistor Readout, with IEEE-488

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9934-S
LogWare, Single Channel, Single User

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9934-M
LogWare, Single Channel, Multi User

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1929-2

System Verification, PRT with Readout, Accredited.


Buy it

Choose two temperature points, extra points at additional cost. Available temperature points are –197 °C, -80 °C , –39 °C, 0.01°C, 30 °C, 157 °C, 232 °C, 300 °C, 420 °C, 500 °C, 660 °C.

1929-5

System Verification, Thermistor with Readout, Accredited.


Buy it

Choose two temperature points; extra points at additional cost. Available temperature points are -30 °C, -20 °C, -10 °C, 0 °C, 10 °C, 20 °C, 30 °C, 40 °C, 50 °C, 60 °C, 70 °C, 80 °C, 90 °C, 100 °C.

1930

System Calibration, PRT with Readout, Accredited


Buy it

Choose PRT temperature range for the calibration. Available temperature ranges are –200 °C to 500 °C, –200 °C to 420 °C, –80 °C to 420 °C, –40 °C to 420 °C, –40 °C to 232 °C, 0 °C to 420 °C.

1935

System Calibration, Thermistor with Readout, NVLAP-accredited


Buy it

Choose thermistor temperature range for the calibration. Available temperature ranges are 100 °C span (6 points over span), 60 °C span (7 points over span), 100 °C span (11 points over span).

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Rated 4 out of 5 by from Lots of years of service so far Purchased over twenty-two years ago. Never a problem with the readout, but did have to buy one new probe so far. Just a minor detraction from 5-stars: Since this instrument is so old, the original software that came with it no longer works in current Windows environment and lots of button pushing is required to set up simple data logging.
Date published: 2022-10-11
  • y_2025, m_6, d_21, h_4
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  • REVIEWS, PRODUCT
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