Unique, portable solution for in-field CEMS calibration

  • Variable gas concentration under both dry and humidified conditions
  • In-field testing to EN14181 / US EPA

Instrument Overview

The Procal 9000 range of portable gas / water vapour blenders are designed to carry out field testing and recalibration of installed Continuous Emission Monitoring Systems (CEM) / Automated Measuring Systems (AMS) safely and securely. Designed for ease of use in the industrial environment, they are mounted in a customised backpack to enable safe use when accessing elevated platforms.


Procal 9100
Water Vapour Generator – delivers a constant 5 litres/min flow with between 2 and 60% water vapour concentration by volume. Mounted on a two metre flexible conduit, the mini evaporator is designed to connect easily and directly to the calibration port of the analyser system, avoiding the need for heated sample lines. A syringe pump, using low-cost 50ml syringes, provides a convenient water injection method. A quick-change mechanism makes it practical to carry a number of pre-filled syringes to the point of use for extended device operation. The lightweight unit is supplied with a custom-made backpack for maximum portability. The backpack may also be worn on the front of the body when ease of access is required in confined spaces.


Procal 9200
Test Gas Divider. Housed in the same portable lightweight and robust Procal 9000_03polyurethane case as the Procal 9100, this unit contains two high-accuracy mass flow controllers coupled with a simple to use control interface. The unit has the facility to enter gas cylinder concentrations and to calculate and display final mix information as well as individual gas flow rates. Using this unit, linearisation tests on analyser systems (CEM / AMS) may be carried out with a single cylinder of gas per species. This represents a very cost effective approach to linearisation testing as require by EN14181 and the US EPA.


Procal 9300
Procal 9000_04Combining the functionality of both the Procal 9100 water vapour generator and Procal 9200 test gas dividers, this unit can be used to generate humidified gas samples. The test gas and water vapour concentrations can be set independently; allowing the unit to be used to verify the correct operation of extractive analyser sample preparation systems (CEM / AMS). For example, by applying accurately humidified SO2 samples, the proportion of soluble gas removed by sample conditioning (coolers / dryers) can be measured. The test sample should be applied at the stack takeoff point in order to fully challenge the system.






Special Features:

  • Portable water vapour/gas generator
  • Calibrated to traceable standards
  • Multiple gas concentrations available from single source
  • Gas cylinder
  • Single self contained unit
  • Simple user interface


  • Unique in the market, allowing in situ calibration
  • Allows customer to meet legislative requirements
  • Allows in-situ linearisation testing from a single gas cylinder (required for Qual 2 (AST) checking within MCERTS )
  • Multiple equipment hook-ups not required
  • Minimal training/qualification required

Procal 9100
Water Vapour:
2 – 60% by volume

Sample flow:

5 l/min

Water capacity:
50ml liquid – Giving a running time per charge of approximately 1 hr @ 20% or 20 min @ 60%

Warm up time:
2 min

± 1% of Set point plus ± 0.2% water vapour

Procal 9200
Two individually controlled Mass Flow Controllers

Flow Rate:
Each 0.1 – 5 l/min


Each ± 0.5% of set point, plus ± 0.1% of full scale

Procal 9300
Combines the specifications of both the 9100 and the 9200 above

Lightweight, robust polyurethane case contained within an easy to wear, comfortable backpack

58cm H x 35cm W x 22cm D



90-264 VAC 47-63 Hz 260W

Instrument Air:
Requires up to 5 I/min @ 1-2 bar

Sample line connection:
6mm O/D stainless steel tube (6mm to 1/4” adaptor supplied)

Inlet connections:
1/8” BSP female


The system is calibrated to traceable national standards. Annual recalibration service is available


Manual ???

e-mail confirmation

MLU core region