TPI 343 Legionnaires Temperature Kit 3

  • Dual input K-type temperature checks
  • Reads T1, T2 and T1-T2 difference
  • Includes immersion, surface and air probes
  • Three-year warranty for added cover
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From £119.00 (ex VAT)

£142.80 (inc VAT)

Earn 119 – 139 points

In Stock - Express Delivery Available
  • Dual input K-type temperature checks
  • Reads T1, T2 and T1-T2 difference
  • Includes immersion, surface and air probes
  • Three-year warranty for added cover
Free Shipping

Spend over £100 on any new goods order and receive automatic free shipping

Rewards

Points make purchases! For every £1 spent, earn back 1p that can be spent on any future new goods purchase

Our Price Promise

We offer a Price Match Promise! Find an equivalent tester for a cheaper price on a competitor site, and we’ll do our best to match it

Express Delivery & Calibration

Express Delivery is currently unavailable for customers wishing to add calibration to their New Goods order. For more information, visit our Delivery Information page. 

From £119.00 (ex VAT)

£142.80 (inc VAT)

Earn 119 – 139 points

In Stock - Express Delivery Available
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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

pdf

 

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
pdf

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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

pdf

 

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

QUESTIONS

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Stock take notice: Orders must be placed before 10:00am on Wednesday 15th July 2026 for despatch before our stock take. Orders received after this time will be despatched from Monday 20th July 2026, when normal business operations commence. Thank you for your understanding.