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testo 327-1 Flue Gas Analyser Advanced Kit 0563 3203 81

New for 2020 the testo 327-1 Flue Gas Analyser offers a robust and simple entry into flue gas analysis for domestic boilers. It measures O2 & CO , and will calculate ratio, CO2, etc.

Important Calibration Information

For calibration options please call us FREE on 0333 554 9758
to discuss the available options.
Please see *Calibration Information.

Next Day Delivery (subject to availability)

£511.45 exc. VAT £613.74 inc. VAT £708.00 inc. VAT
  • Ambient CO measurement using flue gas probe
  • Differential Temperature Kit
  • EN 50379 Part 2 for O2 , °C, mbar
  • EN 50379 Part 3 for CO
  • Flue draught and differential pressure measurement
  • Printer Included
  • Tightness and let-by tests
  • Infra-red output
  • FreeDelivery
  • 30DayMoneyBack
  • Description
  • Features & Specification
  • Resources
  • Delivery (updated)

testo 327-1 Flue Gas Analyser Advanced Kit 0563 3203 81


*Important Calibration Information:

Please note that due to additional stringent procedures required to calibrate natural gas equipment, calibration on this instrument may unfortunately incur a longer turnaround.
Whilst we are acutely aware that this is not always convenient, we kindly request that you allow approximately 5-7 additional working days for purchases including calibration.
We will endeavour to always improve upon this but feel it is important to let our customers know before the purchase is made.

The testo 327-1 is the entry measuring instrument for flue gas analysis. It measures combustion efficiency, °C, O2 , CO2 , CO and flue draught.

A dual wall O2 measurement as well as an ambient CO measurement are also possible. The powerful LED backlighting in the 4-line display guarantees good legibility even in poor lighting. The measuring instrument stands out thanks to its ergonomic housing design as well as its durability (IP40). The integrated sensor and instrument diagnosis offers security and guarantees high availability of the instrument.

The testo 327-1 is tested to EN50379, and also conforms to BS7967 and Gas Safe TB143. The single integrated flue gas and thermocouple connector of the testo 327-1 ensures a fast, gas tight connection to the sample hose every time. The testo 327-1 also has automatic pump protection as standard to help protect the CO measuring cell from damage due to over-range (4,000ppm range capability).

The testo 327-1 provides best quality and value for flue gas analysis and much more. It measures combustion efficiency, °C, O2, CO2, CO and flue draught. The strong LED background light in the 4 line display guarantees an easy-to-read display even when lighting conditions are unfavourable. The analyser stands out on account of its easy menu navigation and ergonomic housing as well as its durability.

testo 327-1 Advanced Kit Comes Supplied With:

  • testo 327 Flue Gas Analyser
  • Rechargeable battery
  • Calibration protocol
  • Flue Gas Probe (180mm x 6mm diameter)
  • Pressure hose Connection Kit
  • Differential temperature kit (2 x pipe clamp probes)
  • testo infrared printer 0554 0549
  • Soft carry case with shoulder strap
  • AC power supply

Key Features:

  • Easy menu navigation
  • 4 line segment display
  • LED display light
  • 4,000ppm CO sensor with automatic pump shut off to help prevent saturation.
  • Easy IR printout
  • Built-in condensate trap
  • Testo IR printer
  • EN 50379 Part 2 for O2 , °C, mbar
  • EN 50379 Part 3 for CO
  • Li-ion rechargeable battery
  • Fast probe connection using single probe plug
  • Ambient CO measurement using flue gas probe
  • Adaptors and accesories for  pressure measurement, and differential temperature clamp probes supplied
  • Differential temperature measurement
  • Flue draught and differential pressure measurement
  • Timed ambient CO measurement
  • Tightness and let-by tests
  • 7 fuels available in menu

Spares and Accessories (Not Included):

  • Mains unit international 100-240 V AC / 6,3V DC for mains operation or battery charging in instrument for mains operation or battery
    charging in instrument 0554 1096 
  • Testo fast printer IRDA with wireless infrared interface; 1 roll thermal paper; 4 AA batteries 0554 0549
  • Spare thermal paper for printer (6 rolls) 0554 0568
  • testo manual smoke pump for testing oil fired boilers 300554 0307
  • Hose connection set for separate gas pressure measurement testo 327 / testo 330-LL 0554 1203
  • Differential temperature set consisting of 2 clamp probes and thermocouple adapter 0554 7223
  • Spare particle filter, 10 off 0554 0040
  • Spare soot filter paper; 8 paper rolls 0554 0146
  • CPA1 Probe Set: Includes B2 angled probe, B1 gas cooker probe, hose connector
    silicone hose, gas pressure controller and gas leak detector 300554 1000

ISSWWW and Testo

Testo Limited was established in 1983 as the UK subsidiary of testo and is based in Alton, Hampshire where they supply a full range of test equipment across the UK and Ireland. They are a key supplier to the Facility Management and Industrial Maintenance Sectors where they are able to provide the full range of instruments which are critical to the effective and efficient maintenance of premises, and allow compliance with all key regulations.

Testo have many innovative products to their portfolio with a modern attractive design. Aesthetic appeal isn't something usually attributed to test equipment but Testo really breaks the mould. Coupled with their pedigree as a worldwide manufacturer and supplier with a proven track record, we are confident in supplying and recommending Testo products without reservation.


testo 327-1 Standard Kit Technical Specification
Temperature - TC Type K (NiCr-Ni)

Measuring range

-40.00 to +600.00 °C


±0.50 °C (0 to 99.90 °C)

±0.50 % of mv (100 to 600 °C)


0.1 °C

Reaction time

< 50 s

Temperature (ambient temperature)

Flue gas O₂

Measuring range

0 to 21 Vol.%


±0.2 Vol.%


0.1 Vol.%

Reaction time t₉₀

30 s

Differential Pressure flue gas Draught - Piezoresistive

Measuring range

-40.0 to +40.0 hPa

±0.03 hPa (-3.00 to +3.00 hPa)


±0.02 hPa (-0.50 to +0.60 hPa)

±0.03 hPa (+0.61 to +3.00 hPa)

±1.50 hPa (3.01 to +40.0 hPa)


0.01 hPa

Flue gas degree of effectivity, Eta (calculated)

Measuring range

0 to 120 %


0.1 %

Flue gas loss (calculated)

Measuring range

0 to 99.0 %


0.1 %

Flue gas CO₂ calculation (calculated from O₂)

Measuring range

0 to CO₂ max (Display range)


±0.2 Vol.%


0.1 Vol.%

Reaction time t₉₀

< 40 s

Flue gas CO (without H₂-compensation)

Measuring range

0 to 4000 ppm


±20 ppm (0 to 400 ppm)

±5 % of mv (401 to 2000 ppm)

±10 % of mv (2001 to 4000 ppm)


1 ppm

Reaction time t₉₀

60 s

General technical data


(with probe) Approx. 700 g


201 x 83 x 44 mm

Operating temperature

-5 to +45 °C

Display type

LCD (Liquid Crystal Display)

Display function

Backlit 2-line display

Power supply

Battery: 1500 mAh, mains unit 5V/1A

Storage temperature

-20 to +50 °C

Delivery Notices (Updated March 29th 2021)

During the current situation surrounding the effects of the Coronavirus pandemic, logistics from every company are under immense pressure to deliver goods on time.
Coupled with manufacturers on reduced output due to more stringent working practices and a global shortage of component parts to supply UK manufacturing, we have taken the decision to 
temporarily limit our services rather than let our customers down amid these unprecedented circumstances.
We hope you will understand our position on this and we apologize unreservedly for the inconvenience we know it will cause.

Please note that ALL orders placed before 3:00pm are shipped same-day (subject to stock and any additional services required).
The stated transport times above have some scope for adjustment built-in for the Covid-19 situation. Carriers themselves also have their own extended workload and limitations at this time which are unfortunately beyond our control.

Orders requiring calibration 

Whilst we take the greatest care to get all orders dispatched and delivered to you in the stated time frame, orders received PM and requiring
calibration may on occasion miss dispatch that day, according to the complexity of the calibration. Be assured they will ship on the next dispatch
this in most cases should not add more than 24 hours to your delivery.

Bank/Public Holidays

Predicted delivery times are based on regular trading days Monday to Friday. Public holidays, bank holidays and weekends are outside the usual scope
of our dispatch and subject to activities/holidays of our carriers and therefore may incur additional days lead time to your order.

*UK Mainland (Revised March 2021)

Service  Price 
Standard FREE 2-3 Day Courier Delivery – UK Mainland only - Zones A & B - Order value OVER £75.00 ex VAT - Order by 3:0pm FREE
Standard FREE 2-3 Day Courier Delivery – UK Mainland only - Zones A & B - Order value UNDER £75.00 ex VAT - Order by 3:0pm £4.75
Next WORKING Day (excludes Saturdays, Sundays and public holidays)  – UK Mainland only - Zones A & B  - ANY order value - Order by 3:0pm      £7.75
Saturday ANYTIME Delivery - Order by 3:0pm £9.95

New Postage Map Sept 2018>

Delivery Surcharges

Because of the high cost of carriage, we regretfully need to apply a surcharge on all deliveries made in the following regions:

  • Zones A & B  - Mainland delivery rates apply. 
  • Zone C - Scottish Highlands (Charges are calculated at the checkout).
  • Zone D - Outer Hebrides, Orkney Isles, Shetland Isles, Isle of Man, Scilly Isles, and Channel Islands (Charges are calculated at the checkout).
  • Zone E - Northern Ireland (Charges are calculated at the checkout).
  • Zone F - Republic of Ireland (Charges are calculated at the checkout).

Offshore Services

All offshore deliveries are a 3-4 day service as standard. This includes Channel Islands, Northern & Southern Ireland, Scottish Islands, Isle of Man and the Scilly Isles.

International delivery

International delivery charges are automatically added to your order at the checkout. For any questions regarding international deliveries please contact us at


All export inquiries should be directed to the export division before placement of order.

If no shipping option is available to your selected country please call us FREE on 0800 0224 060 to purchase your items.
All stated prices are subject to VAT at the current rate where applicable.