TPI 343 PLUS Legionella Temperature Testing Kit 3
Professional Legionella Temperature Testing Kit for Fast, Accurate Compliance Checks
The TPI 343 PLUS Legionella Temperature Testing Kit is a complete solution for engineers, water hygiene specialists and facilities managers carrying out Legionella Testing and Legionella risk assessment work. Supplied with a range of specialist probes, this Legionella Kit enables accurate measurement of water, pipe, surface and ambient temperatures, helping you complete inspections quickly and confidently.
Whether you‘re monitoring domestic water systems or commercial installations, the TPI 343 PLUS provides reliable dual-input temperature measurement in a rugged, easy-to-use package.
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Why Choose the TPI 343 PLUS Legionella Temperature Testing Kit?
Designed specifically for professional Legionella Testing, this Legionella Temperature Testing Kit includes everything needed to measure temperatures throughout a water system.
The dual-input thermometer allows you to monitor two temperatures simultaneously or display the temperature difference (T1-T2), making it ideal during a Legionella risk assessment.
TPI 343 PLUS Key Features:
- Complete Legionella Temperature Testing Kit
- Ideal for professional Legionella Testing and water hygiene inspections
- Dual K-type thermocouple input
- Temperature range from -50°C to +1,350°C (-58°F to +2,462°F)
- Displays T1, T2 or T1-T2 differential readings
- Automatic field calibration by key operation
- MIN/MAX Record and Data Hold functions
- Switchable °C and °F display
- Supplied in a durable soft carry case
The TPI 343 PLUS is protected by a durable rubber boot with an integrated tilt stand, allowing the thermometer to stand upright on a flat surface for convenient, hands-free temperature monitoring.

| Features | |
| Input | Dual K-type thermocouple |
| Temperature Range | -50°C to 1,350°C (-58°F to 2,462°F) |
| Display Resolution | 0.1°C/°F up to 999.9°C/°F 1.0°C/°F above 1,000°C/°F |
| Accuracy | ±3°F (±1.6°C) from -58°F to 32°F (-50°C to 0°C) ±0.3% of reading +1.8°F (1°C) from 32°F to 1,100°F (0°C to 600°C) ±0.4% of reading +1.8°F (1°C) from 1,100°F to 2,462°F (600°C to 1,350°C) |
| Update Rate | 2.5 times/second |
| Field Calibration | By key operation |
| Operating Temperature | 0°C to 50°C |
| Storage Temperature | -25°C to 70°C |
| Battery | 9V |
| Battery Life | 200 hours (Alkaline) |
| Connector Type | Submini, Dual Input |
What comes with TPI 343 PLUS?
- TPI 343 PLUS Dual Input Differential Thermometer
- TPI FK11M Immersion Probe
- TPI CK11M Surface Probe
- TPI CK21M Temperature Pipe Clamp
- 2 x TPI GK21M Air (Beaded) Probes
- TPI A901 Soft Carry Case
❓ Frequently Asked Questions (FAQ)
Q1: What is the TPI 343 PLUS used for?
A. The TPI 343 PLUS is designed for professional temperature measurement and is widely used for Legionella Testing, water hygiene monitoring, HVAC servicing and general maintenance.
Q2: Is this a complete Legionella Temperature Testing Kit?
A. Yes. This Legionella Temperature Testing Kit includes immersion, surface, pipe clamp and air probes, allowing you to measure temperatures across a complete water system.
Q3: Can I use this kit for a Legionella risk assessment?
A. Yes. The kit has been assembled specifically to support temperature measurements required during a Legionella risk assessment, helping verify hot and cold water temperatures throughout a system.
Q4: What temperature range does the TPI 343 PLUS measure?
A. The TPI 343 PLUS measures from -50°C to +1,350°C (-58°F to +2,462°F) using dual K-type thermocouple inputs.