All our measurement equipment for tracing in natural environments

All our measurement equipment for tracing in natural environments

A tracing test does not end when a substance is injected. Detecting its passage, monitoring its recovery and analysing the results require instruments suited to the tracer, the study area and the duration of the investigation. Fluotechnik offers fluorimeters for measuring fluorescent signals and data loggers for collecting and storing the information obtained over time. These instruments can be used separately or combined within the same system to monitor tests in aquifers, rivers, springs, karst networks, catchment areas and other natural systems.

A complete overview of your measurement system

Compare the instruments available for detecting a tracer, measuring its signal and monitoring the results over time.

Direct measurement and data logging

When required by the protocol, combine a fluorimeter with a data acquisition and storage solution.

Suitable for studies in natural environments

Equip your monitoring campaigns in aquifers, rivers, springs, resurgences, karst networks and catchment areas.

Compatible with different tracers

Select your instruments according to the substance used, its wavelengths and the expected concentrations.

Expert technical support

Fluotechnik helps you build a system suited to your control points, measurement frequency and monitoring duration.

A complete overview of your measurement system

Compare the instruments available for detecting a tracer, measuring its signal and monitoring the results over time.

Direct measurement and data logging

When required by the protocol, combine a fluorimeter with a data acquisition and storage solution.

Suitable for studies in natural environments

Equip your monitoring campaigns in aquifers, rivers, springs, resurgences, karst networks and catchment areas.

Compatible with different tracers

Select your instruments according to the substance used, its wavelengths and the expected concentrations.

Expert technical support

Fluotechnik helps you build a system suited to your control points, measurement frequency and monitoring duration.

Which equipment should you choose to measure and monitor a tracing test?

The measurement system should be defined at the same time as the tracer, injection points and control areas. It mainly depends on the information the study is intended to provide. To detect the presence of a fluorescent tracer directly and measure the intensity of its signal in water, the fluorimeter is the central instrument.

It can be used to:

  • Detect the arrival of the tracer
  • Monitor tracer recovery
  • Measure changes in the signal
  • Compare several points
  • Determine transit time
  • Produce a breakthrough curve

When values need to be collected regularly, stored throughout the campaign or analysed over a long period, a data logger can complete the system.

It can be used to:

  • Retain a history of the measurements
  • Monitor changes over time
  • Reduce the need for manual readings
  • Organise the information collected
  • Make comparison and analysis easier

Requirements therefore vary according to the protocol. A short campaign may rely on manual measurements taken with a fluorimeter. Longer-term monitoring may require a more autonomous system combining measurement, data acquisition and storage.

Our range of equipment for measuring and monitoring your tests

Fluotechnik offers several families of instruments for hydrological, hydrogeological and environmental studies. Fluorimeters are used to detect and measure the signals emitted by fluorescent tracers in water. They can identify the arrival of a tracer, monitor its recovery and compare several control points.

Data loggers collect, store and organise the values produced by the instruments or sensors used in the protocol. They are particularly useful when measurements need to be repeated or monitored over an extended period.

The choice of equipment depends in particular on:

  • The tracer used
  • The parameter to be measured
  • The expected concentrations
  • The acquisition frequency
  • The duration of the monitoring campaign
  • The number of control points
  • The installation conditions
  • The required autonomy
  • Data storage and analysis requirements

How do you choose the right measurement equipment for your study?

Instrument selection begins with the scientific or technical question the study must answer. The system can then be adapted to the tracer, environment, control points and required acquisition rate.

Step 1 - Define the objective of the campaign

Begin by identifying what the measurements need to show:

  • Confirm a hydraulic connection
  • Detect the arrival of a tracer
  • Measure transit time
  • Monitor tracer recovery
  • Compare several flow paths
  • Observe changes in the signal
  • Carry out long-term monitoring.

This objective determines whether spot measurements are sufficient or regular data acquisition is required.

Step 2 - Identify the tracer and signal to be measured

The instrument must be compatible with the substance used. For a fluorescent tracer, check in particular:

  • Excitation and emission wavelengths
  • The expected concentration range
  • The required sensitivity
  • The possible presence of other tracers
  • Potential interference within the environment

Sodium fluorescein, Rhodamine WT, eosin, Sulforhodamine B, Amino G Acid and sodium naphthionate do not all produce the same signal.

Step 3 - Determine the direct measurement requirements

When the objective is to detect and quantify a fluorescent signal in water, a fluorimeter compatible with the tracer and field conditions must be selected.

The choice may depend on:

  • The required sensitivity
  • The number of channels needed
  • The type of measurement
  • The installation method
  • The reading frequency
  • Whether the instrument will be used for spot or prolonged monitoring

Step 4 - Assess the need for data logging

A data logger becomes relevant when measurements need to be:

  • Repeated at regular intervals
  • Stored for several hours, days or weeks
  • Compared over time
  • Collected without a permanent presence in the field
  • Incorporated into a broader monitoring system

It then complements the measurement instrument by organising data acquisition and storage.

Step 5 - Define the monitoring points and frequency

Measurements can be taken at a resurgence, watercourse, borehole, piezometer, outlet or any other potential tracer recovery point.

The acquisition frequency should take account of:

  • The estimated transit time
  • The likely duration of tracer recovery
  • The rate at which the signal may change
  • The number of points being monitored
  • Site accessibility
  • Equipment autonomy

An acquisition rate that is too low may miss a recovery peak or a rapid change.

Step 6 - Plan calibration and reference measurements

Before injection, measuring the background level of the environment is recommended. Depending on the instruments and the required results, calibration may also be necessary to relate signal intensity to a known concentration. Reference conditions should be as close as possible to those encountered during the study.

Step 7 - Check the consistency of the complete system

The tracer, fluorimeter, optional data logger, power supply, acquisition frequency and analysis method must operate as a single coherent system. This technical consistency produces data that are easier to interpret and genuinely suited to the objective of the study.

Why choose your measurement equipment with Fluotechnik?

Building a measurement system requires the injected substance, target signal, instruments, field conditions and monitoring duration to be considered together. Fluotechnik supports consulting firms, hydrogeologists, laboratories, local authorities and research organisations in selecting equipment suited to their monitoring campaigns.

Several functions covered by one range

Fluorimeters and data loggers meet requirements for detection, measurement, acquisition and monitoring over time.

Instruments suited to fluorescent tracers

The equipment is selected according to the substances used and the signals to be detected.

Solutions for different types of campaign

Spot measurements, repeated inspections and long-term monitoring require different configurations.

Support when designing the protocol

Fluotechnik helps you select the instruments, control points and acquisition rate.

Complementary tracers and equipment

You can also select the fluorescent substances and accessories required to carry out your test.

Expert technical support

Our team helps you check compatibility between the tracer, measurement instrument, data logging system and conditions of use.

From tracer detection to data analysis in video

Discover how measurement instruments are incorporated into a tracing campaign in a natural environment.

These videos provide a clearer understanding of:

  • Selecting the tracer and instrument
  • Preparing the control points
  • Measuring the background signal
  • Calibrating the fluorimeter
  • Monitoring tracer recovery
  • Selecting the acquisition frequency
  • Recording the values
  • Reading a breakthrough curve
  • Analysing the data collected
Lire la vidéo

Need technical expertise?

Discover our Hydrology & Fluorescent Tracing catalogue: a complete selection of professional solutions dedicated to tracing water flows, studying underground networks and detecting hydraulic transfers. Fluorescent dyes, fluorimeters, detection equipment and technical accessories...

  • Tracing guide
  • Advice / Training
  • Contact a local service provider

FAQ about measurement equipment for tracing

Fluotechnik offers fluorimeters for detecting and measuring fluorescent tracers, as well as data loggers for collecting and storing measurements over time.

A fluorimeter measures the fluorescent signal produced by the tracer. A data logger stores and organises the values obtained over a given period. It does not necessarily measure fluorescence itself but can be connected to the instrument or sensor that performs the measurement.

No. A fluorimeter may be sufficient for a short campaign or manual readings. A data logger becomes useful when values need to be acquired regularly, stored over a prolonged period or collected without permanent human intervention.

Depending on the model selected, the equipment may be used to monitor substances such as:

  • Sodium fluorescein or uranine
  • Rhodamine WT
  • Eosin
  • Sulforhodamine B
  • Amino G Acid
  • sodium naphthionate

Compatibility between the tracer wavelengths and the instrument must always be checked.

Yes. It can be used for studies in aquifers, rivers, springs, resurgences, karst networks, catchment areas and other hydrological systems. The choice nevertheless depends on the installation conditions, required autonomy and necessary level of protection.

Yes. Some instruments are designed to be used or installed directly on site. Their suitability depends on durability, autonomy, mounting method, environmental conditions and reading frequency.

A correctly calibrated fluorimeter can estimate or measure the concentration of a compatible tracer. However, the raw signal value should not be interpreted as a concentration without calibration suited to the conditions of the study.

Several factors can affect the results:

  • Natural fluorescence
  • Turbidity
  • Suspended matter
  • Temperature; pH; ambient light
  • The presence of other substances
  • Sensor fouling

These factors must be considered when preparing the protocol.

Spot measurements may be sufficient when the likely recovery time is known and the site is easily accessible. Continuous or repeated monitoring is preferable when transit time is uncertain, tracer recovery may be brief or the site cannot be inspected permanently.

Yes, provided that a suitable configuration is selected in terms of autonomy, storage capacity, power supply, protection and acquisition frequency.

The choice mainly depends on:

  • The tracer
  • The signal to be measured
  • The expected concentrations
  • The number of monitoring points
  • Measurement frequency
  • The duration of the campaign
  • Field conditions
  • Data logging and transmission requirements
  • The planned analysis method

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Choosing the right equipment for your tracing protocol

Measurement equipment converts the passage of a tracer through water into observable, usable data. Selecting the right instruments depends as much on the substance used as on the question being investigated and the organisation of the campaign.

The choice of system depends in particular on:

  • The tracer used
  • The wavelengths and concentration range
  • The environment being studied
  • The required sensitivity
  • The number of control points
  • Measurement frequency
  • Monitoring duration; the required autonomy
  • Installation conditions
  • Data storage and analysis requirements

To detect a fluorescent tracer directly, measure its signal and monitor its recovery, a compatible fluorimeter should be selected. When measurements need to be collected regularly, stored throughout the campaign or compared over time, a data logger can complete the system.
Depending on the study, these instruments may be used separately or together. A spot measurement at an accessible site does not require the same configuration as continuous monitoring at several remote points. Fluotechnik supports you in selecting the instruments, tracers and accessories required to build a consistent measurement system.

Complete your measurement and tracing protocol

A reliable system combines a suitable substance, a compatible instrument and a consistent acquisition method. Discover Fluotechnik solutions for measuring signals, monitoring tracer recovery and storing the information collected during your campaigns.

Tracing & measurement in natural environments

Tracing & measurement in natural environments Discover our solutions for studying water circulation.
Tracing & measurement in natural environments
Explore fluorescent substances, liquid and powder tracers, fluorimeters and monitoring equipment for hydrological and hydrogeological studies.
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Fluorimeters

Detect and measure the signals produced by your fluorescent tracers.
Fluorimeters
Compare fluorimeters according to the substances used, wavelengths, expected concentrations and measurement conditions.
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Data loggers

Collect and store your measurements throughout the monitoring period.
Data loggers
Data loggers complement measurement instruments when values need to be stored, compared or acquired regularly in the field.
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Rhodamine WT 20%

Choose another fluorescent signature for your water circulation studies.
Rhodamine WT 20%
Measuring Rhodamine WT requires an instrument suited to its signal, the expected concentrations and tracer recovery conditions.
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Amino G Acid

Complete your studies in natural environments with another fluorescent substance.
Amino G Acid
Amino G Acid can be selected when its fluorescent signature, instrument sensitivity and study conditions are compatible.
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Sodium naphthionate

Add another signal to a protocol using several tracers.
Sodium naphthionate
Sodium naphthionate can complement certain studies, provided that the fluorimeter and analysis method are suited to its fluorescent signature.
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