3125 Surface Probe Calibrator





3125 Surface Probe Calibrator

Why buy a non-temperature calibration device designed for test tube sterilization or PC board repair when you can have a true calibration instrument? The 3125 has a uniform surface temperature and reaches temperatures as high as 400°C.

The test surface is milled aluminum for an absolutely smooth and true calibration work area with maximum thermal conductivity. The 12.25-square-inch test surface is large enough to calibrate more than one sensor at a time. The 3125 can be used with a reference surface sensor or PRT. PRTs (3/16″ diameter, such as the 5615) may be inserted through a drilled hole into the center of the block for use as reference thermometers or for easy recalibration of the unit’s display.

With an accuracy of ±0.5 °C to 200 °C and ±1 °C to 400 °C, you can calibrate almost any surface probe, thermistor, thin film sensor, RTD, thermocouple, ribbon sensor, or surface mount cutouts, fuses, and switches. Stability is within ±0.3 °C at 400 °C and uniformity within the center three inches of the surface is ±0.6 °C at 200 °C. Don’t buy “make-do” hot plates when you can have a legitimate calibration tool.


Calibrates surface sensors up to 400°C

Surface probes are difficult to calibrate because it’s hard to find a flat, heated surface that’s stable and uniform. The model 3125 Surface Dry-Well takes advantage of our proprietary 2200 Temperature Controller and gives you the best possible conditions for calibrating surface sensors.


Temperature Range 35 °C to 400 °C
(95 °F to 752 °F)
Display Accuracy ±0.5 °C to 200 °C
±1.0 °C to 400 °C
Stability ±0.2 °C to 300 °C
±0.3 °C to 400 °C
Resolution 0.01 °
Uniformity ±0.3 °C at 100 °C
±0.6 °C at 200 °C
±0.9 °C at 300 °C
±1.4 °C at 400 °C
Heating Time 25 °C to 400 °C : 22 minutes
Cooling Time 400 °C to 100 °C: 65 minutes
Stabilization Time 8 minutes
Controller Fluke Calibration Model 2200, microprocessor based, with RS-232
Readout °C or °F, switchable
Sensor RTD, 100
Heater 325-watt, solid-state controlled
Surface Plate 6061 aluminum; top surface machine finished to 0.0008 mm (0.000032 in), 96 mm (3.8 in) diameter accessible
Power 115 VAC (±10 %), 2.8 A or 230 VAC (±10 %), 1.4 A, specify, 50/60 Hz, 325 W
Weight 3.2 kg (7 lb.) with 2200 Controller
NIST-Traceable Calibration Data at 50 °C, 120 °C, 190 °C, 260 °C, 330 °C, and 400 °C

Models and Accessories

Model Name Description
3125 Surface Calibrator (includes detachable Model 2200 Controller)

Accessories common to all models  :

Accessory Description
HART DRYWELL CABLE An interface cable kit that includes a null modem to connect the Fluke 754 with Fluke Calibration dry – wells and Micro – Baths to automate and document the calibration of temperature sensors and transmitters in the field or at the bench.

Knowledge and Information

Product Manuals