Location of leaks in cooling and air conditioning systems – SelectH2

Location of leaks with our SelectH2 – The benefits

Our SelectH2 family has been successfully established on the market. With this innovative technology, we offer garages a method of leak detection in passenger car and commercial vehicle A/C systems that saves time and money while protecting the environment. Once the A/C system has been filled with forming gas, vibration leaks that are difficult to detect can be identified with variable adjustment of the pressure. The location of leaks using forming gas, which is 95 percent nitrogen and 5 percent hydrogen, is particularly efficient as even the smallest leaks can be found in leaking A/C systems.

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Diagnosing faulty vaporisers

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Environmentally friendly

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Low-cost procurement of forming gas

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Highly sensitive sensors

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No misdiagnosis due to oil and gas vapours

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Non-toxic

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Made in Germany

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For air-conditioning systems with R134a and HFO-1234yf

SelectH2 – The best device for detecting leaks in A/C systems

The SelectH2 selective gas detector is equipped with two gas sensors, which act like an artificial nose and only respond to hydrogen. Gas and oil vapours do not have a negative impact on the measurement result, so there is no longer any obstacle to effective and precise leak detection on your car or air conditioning system. This is the key difference compared with conventional detection units, which respond to the refrigerant R134a.

SelectH2 Types

   
 SelectH2SelectH2SelectH2SlimSelectH2mini
DisplayWith illuminated LCD display,
  battery status indicator, LED display
With illuminated LCD display,
battery status indicator, LED display
With illuminated LCD display,
battery status indicator, LED display
With illuminated LCD display,
battery status indicator
Lenght gooseneck320 mm 500 mm  500 mm  320 mm 
Housing typeAluminium housing Aluminium housing
Aluminium housing
Aluminium housing
Dual sensor GGS 1000/GGS 6000Broadband,
H2-selective
Broadband,
H2-selective
Broadband,
H2-selective
Broadband,
H2-selective
W x H x D52 x 178 x 35 mm  52 x 178 x 35 mm  52 x 178 x 28 mm 44 x 175 x 36 mm
With acoustic alarm
With integrated work light   
With suction pump ■ 
With extra slim sensor head   
Automatic zero-point calibration in fresh air■  ■
Automatic sensor check with fault detection  ■
Power supply    
Output voltage12 V12 V12 V9 V
Plug typeRound plugRound plugRound plugRound plug

Diameter

 

3,5 mm3,5 mm3,5 mm2,5 mm
Part number:95980002959800249598002595980019

The SelectH2 types

SelectH2 
Gaugewith illuminated LCD display,
with battery state display,
with LED display
Length gooseneck320 mm
Housing typeAluminium housing
Double sensors GGS 1000 / GGS 6000
broad band
H2-selective
W x H x D52 x 178 x 35 mm
With acoustic alarm
With integrated work light 
With suction pump
With extra slim sensor head 
Automatic zero-point calibration in fresh air
Automatic sensor check with error detection
Power supply
 
Output voltage12 V
Plug typeRound plug
Diameter3,5 mm
Part number95980002
Comparison overview

 

 

 

 

 

 

 

 

 

 

 

 

 

SelectH2 
Gaugewith illuminated LCD display,
with battery state display,
with LED display
Length gooseneck500 mm
Housing typeAluminium housing
Double sensors GGS 1000 / GGS 6000
broad band
H2-selective
W x H x D 52 x 178 x 35 mm
With acoustic alarm
With integrated work light 
With suction pump
With extra slim sensor head 
Automatic zero-point calibration in fresh air
Automatic sensor check with error detection
Power supply 
Output voltage12 V
Plug typeRound plug
Diameter3,5 mm
Part number95980024
Comparison overview

 

 

 

 

 

 

 

 

 

 

 

 

 

SelectH2Slim 
Gaugewith illuminated LCD display,
with battery state display,
with LED display
Length gooseneck 500 mm
Housing typeAluminium housing
Double sensors GGS 1000 / GGS 6000
broad band
H2-selective
W x H x D 52 x 178 x 28 mm
With acoustic alarm
With integrated work light 
With suction pump
With extra slim sensor head
Automatic zero-point calibration in fresh air
Automatic sensor check with error detection
Power supply 
Output voltage12 V
Plug typeRound plug
Diameter3,5 mm
Part number95980025
Comparison overview

 

 

 

 

 

 

 

 

 

 

 

 

 

SelectH2mini 
Gaugewith illuminated LCD display,
with battery state display
Length gooseneck 320 mm
Housing typeSynthetic material housing
Double sensors GGS 1000 / GGS 6000
broad band
H2-selective
W x H x D 44 x 175 x 36 mm
With acoustic alarm
With integrated work light
mit Ansaugpumpe 
With extra slim sensor head 
Automatic zero-point calibration in fresh air
Automatic sensor check with error detection
Power supply 
Output voltage9 V
Plug typeRound plug
Diameter2,5 mm
Part number95980019
Comparison overview

 

 

 

 

 

 

 

 

 

 

 

 

 

SelectH2 leak location set

Our leak location set includes a pressure regulator with a pressure indicator and hoses that can be used to fill or top up your air conditioning system. The A/C system can also be filled with forming gas via the low-pressure connection. This means the forming gas can be distributed through the system more quickly and evenly.

  • Expansion set
  • Adapter for low-pressure and high-pressure side

SelectH2 accessories

You can find suitable accessories for locating leaks and filling the A/C system with forming gas in our online catalogue. Always use our accessories to ensure correct filling of the A/C system.

  • Adapter
  • Compressed-air hoses
  • Expansion set
  • Cylinder pressure regulators
  • Connectors
  • Power supply

Adapter for refrigerant R134a and R1234yf

Our Elparts range contains adapters for low and high-pressure sides on a vehicle. However, as different refrigerants circulate in vehicles, we supply adapters for both the R134a and the R1234yf refrigerant. The various adapter versions and their criteria can be found in our online catalogue.

Evacuation

Evacuate the air-conditioning system using a suitable A/C service unit.

Filling A/C system with forming gas 95/5

Now fill the high-pressure side of the air-conditioning system with forming gas. The high and low-pressure side can be topped up simultaneously using the leak-location expansion set.

Heating up the device

The heat-up phase of the SelectH2 is signalled by the word “HEAT” and lasts approx. 50 seconds.

Location of leaks with our SelectH2

Guide the gas detector over the hose connections and components at a steady speed. You can read the respective hydrogen concentrations off the display. Rising ppm values indicate a leak.

Location of leaks

Leaks are also indicated by acoustic and visual signals.

Repair and inspection

After repairing a leak, it is recommended carrying out another inspection using forming gas, followed by a functional check.

Filling with refrigerant and testing for leak-tightness

Fill the air-conditioning system with the appropriate refrigerant. Once you have filled up the A/C system, you should perform a functional test without fail.

Sight glass for refrigerant analysis

Our sight glass enables visual inspection of refrigerant or compressor oil and provides valuable information on their condition. Chips for example or other foreign bodies may have got into the system. You can also check whether compressor oil has become discoloured or contains water. Important information: The connections for R134a or R1234yf must be ordered separately.

  • With integrated filter
  • Easily disassembled for cleaning

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Herth+Buss Fahrzeugteile GmbH & Co. KG
Dieselstraße 2-4
63150 Heusenstamm
Germany

+49 (0)6104-608-0
info@herthundbuss.com