TPI 343 Legionnaires Temperature Kit 3
The TPI 343 Legionnaires Temperature Kit 3 helps users check water, pipe and air temperatures with one practical test kit. It supports legionella control work by giving fast readings across a wide range of test points. The dual input thermometer also displays the difference between two probes, so users can compare readings with ease.
This kit suits site checks where hot water, cold water, pipe surfaces, vents and rooms all need review. It includes probe options for liquids, semi-solids, pipe surfaces and air checks. As a result, users can move between tasks without changing to a different thermometer system.
Flexible temperature testing
The TPI 343 Legionnaires Temperature Kit 3 uses K-type inputs for broad probe support and strong site flexibility. It measures from -50 °C to 1350 °C, depending on the probe used. The included FK11M immersion probe covers -50 °C to 250 °C for water and semi-solid checks.
The CK11M surface probe is waterproof and suits temperature checks on water pipes. Two GK21M beaded air probes support air monitoring in vents and rooms. Therefore, the kit gives users the tools needed for several common legionella temperature tasks.
Clear readings and site-ready use
Users can view Temp 1, Temp 2 and Temp 1 minus Temp 2 on the display. Min and max recording helps track changes during checks, while the hold function freezes a reading on screen. The selectable 0.1° or 1° resolution also helps users choose between fine and general readings.
The TPI 343 Legionnaires Temperature Kit 3 includes auto field calibration in less than 10 seconds when used in ice water. It can achieve ±1 °F system accuracy in the 30 °F to 120 °F range when the tester and probe are calibrated. Two different set types are available, giving users a choice of kit format for their testing needs.
Key Features
- Dual input thermometer supports two probe readings at the same time
- Differential temperature display shows T1 minus T2 for quick comparison
- Wide K-type measurement range supports varied test applications
- FK11M immersion probe checks liquids and semi-solids
- CK11M waterproof surface probe supports pipe temperature checks
- Two GK21M beaded air probes support vent and room air checks
- Auto field calibration takes less than 10 seconds in ice water
- Min and max recording helps users track temperature changes over time
- Selectable 0.1° or 1° resolution supports fine or general readings
- Selectable °C and °F units support different site requirements
- Hold function freezes the displayed reading for easier note taking
- Auto off helps preserve battery life during site use
- Protective rubber boot helps guard the thermometer during daily use
- Easy to read LCD display supports clear viewing during checks
- Supplied with a soft carry case for storage and transport
- Three-year warranty provides added product cover
Technical Specifications
| Product name | TPI 343 Legionnaires Temperature Kit 3 |
| Manufacturer | Test Products International |
| Manufacturer part code | TPI 343 |
| Thermometer type | Dual input differential digital thermometer |
| Sensor type | K-type thermocouple |
| Measurement range | -50 °C to 1350 °C, depending on the probe used |
| Measurement range in °F | -58 °F to 2462 °F |
| FK11M immersion probe range | -50 °C to 250 °C |
| Inputs | Dual submini K-type inputs |
| Display readings | Temp 1, Temp 2 and Temp 1 minus Temp 2 |
| Resolution | 0.1° or 1° selectable |
| Detailed resolution | 0.1 °C/°F up to 999.9 °C/°F and 1 °C/°F above 1000 °C/°F |
| Accuracy from -50 °C to 0 °C | ±1.6 °C or ±3 °F |
| Accuracy from 0 °C to 600 °C | ±0.3% of reading plus 1 °C, or ±1.8 °F |
| Accuracy from 600 °C to 1350 °C | ±0.4% of reading plus 1 °C, or ±1.8 °F |
| System accuracy | ±1 °F in the 30 °F to 120 °F range when the tester and probe are calibrated |
| Field calibration | Auto field calibration in less than 10 seconds using ice water |
| Update rate | 2.5 times per second |
| Min and max recording | Yes |
| Hold function | Yes |
| Selectable units | °C and °F |
| Operating temperature | 0 °C to 50 °C, or 32 °F to 122 °F |
| Storage temperature | -25 °C to 70 °C, or -13 °F to 158 °F |
| Battery type | 9 V battery |
| Battery life | Up to 200 hours with an alkaline battery |
| Auto shut off | Yes |
| Display type | Digital LCD |
| Waterproof probe | CK11M surface probe is fully waterproof |
| Dimensions | 1.6 in x 6 in x 3 in, or 41 mm x 152 mm x 77 mm |
| Weight | 9.8 oz, or 278 g |
| Protective boot | A304 protective rubber boot included |
| Carry case | A901 soft carry case included |
| Additional accessories | Protective rubber boot and instruction manual |
| Warranty | Three years |
Document Downloads
What’s Included
- TPI 343 dual input thermometer
- FK11M immersion probe
- CK11M surface probe
- 2 x GK21M air beaded probes
- A901 soft carry case
- Protective rubber boot
- Instruction manual









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