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Thermometer Readout Selection Guide

Fluke Calibration Precision Digital Thermometer Readouts and Reference Thermometers

A Fluke Calibration precision digital thermometer readout is specifically designed to measure temperature sensors for calibration. The purpose of the readout is to measure a temperature sensor’s resistance or voltage and display a temperature. However, not every instrument that simply measures resistance or voltage is well suited for work with PRTs, RTDs, thermocouples or thermistors. Because thermometer readouts are designed for calibration, they offer many advantages, especially convenience and accuracy.

Intrinsically safe thermometers

1551A Ex 100 Ω thin-film RTD –50 °C to 160 °C 
(–58 °F to 320 °F)
Accuracy of ± 0.05 °C (± 0.09 °F) over full range.
Intrinsically safe (ATEX and IECEx compliant.
Two models to choose from (-50 °C to 160 °C or -80 °C to 300 °C)
1552A Ex 100 Ω wire-wound PRT –80 °C to 300 °C 
(–112 °F to 572 °F)

Super-Thermometers

1594A  SPRTs, PRTs, Thermistors  ± 0.00006 °C Ratio accuracy of 0.8 ppm; temperature-controlled internal reference resistors; six input channels.
1595A  SPRTs, PRTs, Thermistors  ± 0.000015 °C Ratio accuracy of 0.2 ppm; Ratio Self-Calibration; automated zero-power measurements.

Fluke Precision Digital Thermometer Readouts

Model 

Probe Types 

Accuracy at 0 °C

Features 

Most Popular

1502A  PRTs  ± 0.006 °C Resolution of 0.001 °C and accuracy to match; uses ITS-90, IPTS-68, CVD, or DIN (IEC 751) conversions. 
1504  Thermistors  ± 0.002 °C Reads thermistors from 0 to 500 KW; uses Steinhart-Hart and CVD. 

Handheld

1523 PRTs, Thermistors, Thermocoouples ± 0.002 °C Battery-powered, handheld reference thermometer; INFO-CON connector reads coefficients without programming; saves 25 readings on demand; graphs trends
1524 PRTs, Thermistors, Thermocoouples ± 0.002 °C Handheld reference thermometer same as 1523 but with inputs for two thermometers; logs up to 15,000 readings and stores 25 more on demand.

Battery Powered

1523 PRTs, Thermistors, Thermocoouples ± 0.002 °C Battery-powered, handheld thermometer; INFO-CON connector reads coefficients without programming; saves 25 readings on demand; graphs trends
1524 PRTs, Thermistors, Thermocoouples ± 0.002 °C Same as 1523 but with inputs for two thermometers; logs up to 15,000 readings and stores 25 more on demand.
1529  PRTs, Thermistors, Thermocouples  ± 0.006 °C
(PRT) 
Four channels can all be measured simultaneously; battery-powered; logs up to 8,000 readings; flexible display. 

High Accuracy

1594A  SPRTs, PRTs, Thermistors  ± 0.00006 °C Ratio accuracy of 0.8 ppm; temperature-controlled internal reference resistors; six input channels.
1595A  SPRTs, PRTs, Thermistors  ± 0.000015 °C Ratio accuracy of 0.2 ppm; Ratio Self-Calibration; automated zero-power measurements.

Multi-Channel

1586A Super-DAQ SPRTs, PRTs, Thermistors, Thermocouples PRTs:
± 0.005 °C
(using the external DAQ-STAQ Multiplexer)

Thermistors:
± 0.002 °C

Thermocouples:
± 0.5 °C
(using the High-Capacity Module and internal CJC)

Up to 40 input channels. Scan speeds as fast as 10 channels per second.
1560  Accepts any combination of the modules below; all are easily added to and removed from the 1560 base. 
2560 SPRTs, PRTs  ± 0.005 °C 2 channels of 25W  or 100W  PRTs. 
2561 HTPRTs  ± 0.013 °C 2 channels to 1200 °C. 
2562 PRTs  ± 0.01 °C 8 channels of 2-, 3-, or 4-wire RTDs. 
2563 Thermistors  ± 0.0013 °C 2 channels of resolution to 0.0001 °C. 
2564 Thermistors  ± 0.0025 °C 8 channels for data acquisition. 
2565 Thermocouples  ± 0.05 °C Reads most TC types with 0.0001 mV resolution. 
2566 Thermocouples  ± 0.1 °C Reads any combination up to 12 channels of virtually any type of TC. 
2567 1000 Ω  PRTs  ± 0.006 °C 2 channels of high-resistance PRTs. 
2568 1000 Ω  PRTs  ± 0.01 °C 8 channels of high-resistance PRTs. 
1529  PRTs, Thermistors, Thermocouples  ± 0.006 °C
(PRT)
Four channels can all be measured simultaneously; battery-powered; logs up to 8,000 readings; flexible display. 
1594A  SPRTs, PRTs, Thermistors  ± 0.00006 °C Ratio accuracy of 0.8 ppm; temperature-controlled internal reference resistors; six input channels.
1595A  SPRTs, PRTs, Thermistors  ± 0.000015 °C Ratio accuracy of 0.2 ppm; Ratio Self-Calibration; automated zero-power measurements.

Logging

1529  PRTs, Thermistors, Thermocouples  ± 0.006 °C
(PRT)
Four channels can all be measured simultaneously; battery-powered; logs up to 8,000 readings; flexible display. 
1523 PRTs, Thermistors, Thermocoouples ± 0.002 °C Battery-powered, handheld thermometer; INFO-CON connector reads coefficients without programming; saves 25 readings on demand; graphs trends
1524 PRTs, Thermistors, Thermocoouples ± 0.002 °C Same as 1523 but with inputs for two thermometers; logs up to 15,000 readings and stores 25 more on demand.

Thermo-hygrometer 

Model 

Product 

Features 

 
1620A The “DewK”
Thermo-Hygrometer 
Two channels measure ambient temperature to ±0.125 °C and  %RH to ±1.5 %. Onboard memory holds up to two years of time/date-stamped readings. Visual and audio alarms. Detachable sensors contain their own calibration data for easy recalibrations.  NEW! Ethernet and wireless capabilities.

Reference Multimeter

Model 

Product 

Features 

 
8508A Fluke Reference Multimeter True ohms measurement. 20 amp current measurement. Stores up to 100 PRT coefficients.

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