• Model-2000-DFB-One-Probe-Transparent_ss
  • Angled Shadow
  • Model 2000 DFB Front Face
  • Model 2000 Dessicant
The Model 2000 DFB – 11 allows for the automatic calibration of analog rH probes.


  • Analog Probe Reader
  • Automatic Calibrations
  • DFB Windows Software
  • Custom Technician Profiles
  • Automatic Ramp / Soak
  • Data saved in a file / plot format
Range | RH
Range | Temp

Uncertainty | RH
Uncertainty | Temp

Uniformity | RH

Uniformity | Temp

Stability | RH
Stability | Temp
5 – 95% RH
10°C – 55°C

+- 1.0% RH or better
+- 0.1°C or better

±.1% @ 5%-50%
±.3% @ 50%-90%
±.4% @ 90%-96%
±.1°C @ 50% RH

±0.2%RH or better

Specifications Sheet

Software Manual

Full Specifications


Humidity @ 23°C

± 0.1°C or better

7-80%RH ± 1.0% RH or better 6

80-95%RH ± 1.25%RH or better
Humidity @23°C
Humidity @30°C
Humidity @35°C
Humidity @40°C
Humidity @50°C

10-55°C 2
7% to 95% RH 7
7% to 90% RH 7
7% to 85% RH 7
7% to 80% RH 7
7% to 70% RH 7

±0.2%RH or better
±0.1°C @ 50%RH
±0.2%RH @ 10% to 50%RH
±0.3%RH @ 50% to 90%RH
±0.4%RH @ 90% to 96%RH
1.5°C / Minute (Typical)
5°C / Minute (Typical)

-25°C to 45°C 8

RH and Temp
Controller Type
±0.5%RH and ±0.1°C 5
PID Controller
-40°C to 60°C
0% to 100%

2-pressure method/reference compare 3

Traceable to NIST
USB (USB to USB cable included)
Customized PID Controller, Front Panel
Interface and LCD display

User friendly software included, free of charge. Upgrades include database management, and customer probe history logs for future reference.

Universal 110/220VAC, 50/60 Hz

Weight 28 lbs (14kg)
Weight 32 lbs (16kg) (shipping)

Width Depth Height
Metric 45 cm 36 cm 21 cm
Imperial 17.8 in 14.2 in 8.3 in
Diameter Depth
Metric 14.5 cm 20.0 cm
Imperial 5.7 in 7.9 in

-25°C to 45°C 8

Port sizes 12.5mm, 19mm and 25mm

Port sizes from 6mm to 32mm

Selectable Power Supply based on Probe type

The special DFB feature allows users to calibrate all probes/sensors connected the DFB port through the terminal block mounted on the front panel.

The panel feeds power to the probe, reading the Humidity and Temperature values, and storing them in memory.

These values are displayed on the panel in parallel to the chamber control probe as a reference.

Current Probes
Voltage Probes
0-20mA, 0-20mA
3.3VDC, 5.0VDC, 12.0VDC and 24VDC

5 minutes (Typical Steps) 4
10 minutes (Typical Over Range) 4

1 Typical performance specification for the system’s internal chamber. Insert is required for higher accuracy.
2 Specified low temp is 5°C, but typically temp is 15°C below ambient. For high accuracy, insulated door is recommended.
3 Adjustment of system using standard calibrated by 2-pressure readings
4 After chamber reaches and maintains temperature equilibrium.
5 Laboratory certificates of Thunder Scientific control probe calibration (Accredited NVLAP 200582-0) provided with system.
6 This accuracy stated represents a worst case scenario. Typically the accuracy is ±0.6% or better.
7 To achieve low RH values, dessicant must be 50% unused or better. To achieve high humidity values, system must be warmed up.
8 System software calculates dew point in real time to prevent condensation.