Description
Fluke 6109A-156 – Portable Calibration Bath, 35 °C to 250 °C, 115 VAC

- Portable Calibration Bath, 35 °C to 250 °C, 115 VAC
- Calibrate up to four tri-clamp sanitary sensors at the same time
- Wide temperature ranges cover most process applications: 6109A: 35 °C to 250 °C
- Excellent display accuracy of ± 0.1 °C provides 4:1 test uncertainty ratio (TUR) for critical applications
- Easy to transport up stairs and across catwalks
- Stainless steel casing withstands harsh sterilizing chemicals and is rust proof
- Easy to use and maintain
- Global Fluke support and service
Portable calibration baths designed for clean process applications
Process manufacturing plants for pharmaceuticals, biotechnology, and food production utilize many sanitary temperature sensors that require regular calibration. Production must stop while the calibrations are taking place. Therefore, more calibration throughput means less plant downtime. And in businesses where even a few tenths of a degree Celsius can cost thousands of dollars in ruined product, temperature accuracy is crucial to maintaining quality.
The Fluke Calibration 6109A and 7109A Portable Calibration Baths let process industry professionals calibrate four times more sanitary sensors per batch in less time and with twice the accuracy of other baths in this class. Up to four tri-clamp sanitary sensors fit easily into these baths for calibration at ± 0.1 °C temperature display accuracy. Throughput is even higher for sanitary RTDs with small or no flanges. Two bath models cover a wide temperature range: 35 °C to 250 °C for the 6109A and -25 °C to 140 °C for the 7109A. Each model offers a “-P” version that includes process electronics for connecting an external reference probe.
Professionals working in clean process industries, including facilities managers, production engineers and calibration technicians, prefer these baths for a variety of reasons. Facilities managers who need to meet U.S. FDA and ISO clean room standards like the baths’ stainless steel casing that stands up to harsh cleaning solutions. They depend on the 6109A and 7109A to help maintain the accuracy of the plant’s temperature sensors, thus reducing the possibility of an expensive product batch loss.
Production engineers also appreciate the baths accuracy, which helps them control sensor out of tolerance conditions. Moreover, they prefer to use a bath designed specifically for clean room calibration throughput. No more need to make do with equipment designed for some other application.
Calibration technicians who perform calibrations on platforms, in crawl spaces, and other hard- to-reach parts of the plant enjoy the portability and clean room compatibility (i.e. easy to sanitize, don’t harbor bacteria) of these baths. Global Fluke Calibration service and support ensure that your 6109A and 7109A baths will give you years of service that you can trust.



- 1. Tank – The stainless steel tank contains the bath fluid.
- 2. Bath Fluid – Temperature sensors are inserted into the bath fluid for calibration.
- 3. Control Sensor – A precision platinum resistance thermometer (PRT) control sensor measures and controls the temperature of the bath fluid.
- 4. Stir Motor Cover – Protects the stir motor.
- 5. Stir Motor (under the stir motor cover) – Drives the propeller that circulates the fluid to produce a uniform temperature.
- 6. Stir Guard – Separates the working area of the tank from the stir propeller. MIN and MAX marks show the correct fill levels.
- 7. Propeller – Stirs the bath fluid.
- 8. Ready Indicator – Changes from amber to green when the bath fluid temperature has settled at the setpoint. Green indicates the bath is ready to begin measuring.
- 9. Carrying Handle – Use the carrying handle to lift or move the bath. There are also recessed handles on the side of the bath (not shown).
- 10. Threaded Holes – Used to attach accessories to the bath.
- 11. Tank Cover – Isolates the bath fluid from the environment, reduces fumes, prevents objects from falling into the tank, and keeps the fluid temperature stable
The 6109A-P and 7109A-P models come with a Process Input Module that measures various types of temperature sensors.

- 1. Current Fuse – Protects the Process Input Module and connected devices from accidental short circuit.
- 2. RTD Terminals – A test RTD connects to these terminals. The graphic on the panel shows the circuit diagram for a four-wire RTD.
- 3. Reference PRT connector – A reference probe plugs into this socket. Recommended Fluke Reference PRTs are models 5615-9-A and 5626-12-A. Other Fluke Reference PRTs with Type A INFO-CON termination are also compatible.
- 4. Thermocouple Input – A connector for a miniature thermocouple.
- 5. Transmitter Terminals – A 4-20 mA transmitter connects to the two transmitter terminals labelled mA LOOP and COM.
Calibration Baths | |
|---|---|
| Type | Liquid |
| Min Temp (Calibration Baths) | 35 C |
| Max Temp (Calibration Baths) | 250 C |
| Accuracy (Calibration Baths) | 0.1 C |
| Voltage (Calibration Baths) | 115 VAC |
| Special Features (Calibration Baths) | PC Software, Programmable Tests |
Product General Attributes | |
| Interfaces I/O | RS-232, USB |
| Product Weight | 35 LBS |
| Product Height | 24.00 IN |
| Product Length | 21.00 IN |
| Product Width | 15.00 IN |
| ECCN Number | EAR99 |
| Calibration Included | Factory Calibration |
| Power Supply Voltage | 120V 50/60 Hz |
| Country of Origin | United States |
| Shipping Height | 24.00 IN |
| Shipping Length | 21.00 IN |
| Shipping Width | 15.00 IN |






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