Heating - Ventilating - Air Conditioning
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ALRE Sensors & Transducers

BTF2 - Room Temperature Sensor Surface Installation

BTF2 range Room Temperature Sensor - Surface Installation

"Superflat" surface installation - Berlin 1000 design - or recording temperature in dry rooms, residential rooms or business premises. Mounting and wiring of the lower part canbe done separately, surface mounted or on a switchbox via fixing screws.


FUF Flush Mounting Room Temperature Sensor

FUF range Flush Mounting Room Temperature Sensors

For temperature measurement in residential rooms and business premises. The room temperature sensor with 50 x 50 mm cover can be integrated with almost all switch ranges using an intermediate frame.
Please check with us for the exact model you require for your application

AF Temperature Sensor with Internal Sensor

AF range Outdoor Temperature Sensors with Passive Output, Internal Sensor

The outside temperature sensor Af detects the temperature outside, in wet rooms, cold stores, greenhouses and industrial use. The devices are specially protected against dust and humidity. If the sensor is exposed to direct solar radiation the use of a special protector is recommended.
Please contact us to determine the exact model you require for your application.

AFH / AFHM Outdoor Temperature Sensor with Passive and Active Output

AFH Outdoor Sensors with External Sensor Sleeve
AFHM Outdoor Temperature Sensors with Measuring Transducer and External Sensor Sleeve


The sensor detects the outside temperature in wet rooms, cold stores greenhouses and industrial use. The devices are specially protected against the influence of dust and humidity. The response characteristic of this outdoor sensor is, owing to the externally arranged sensor sleeve, excellent in respect to temperature changes.
The active outdoor sensor model AFHM transduces, in a temperature-linear manner,the temperature-dependent resistance of the sensor to a current signal of 4 to 20 mA or to a voltage signal of 0 to 10 V. If the sensor is exposed to direct solar radiation, the use of a special protector is recommended.
Please contact us for the exact model you require for your application

HF Sleeve Type Temperature Sensor

HF range

Sleeve type temperature sensor with PVC or silicone cable.
For the detection of temperatures in liquid or gasiform media. Its design ensures the protection of the sleeve sensor against moisture and dust. A dip sleeve is needed when using the device in liquid media.
Is also suited for the measuring of temperatures inair ducts or in non-aggressive types of gas when instaled into a protective spiral.
Please contact the office to determine which sensor would be the correct one for your equipment.

LF Air Temperature Sensor

LF range

Air temperature sensor (remote sensor for standard devices eg ITR79). For the measuring of temperatures in air ducts or non-aggressive types of gas. Installation in a protective spiral is required such as SW-200. Model needed depends on the sensor number which range from "0" (NTC2K25) to PT-1000 PE cable 1.5m.
Please contact us for the correct sensor for your application.

ALF / ALFM / MTRVR Clip On Temperature Sensor with passive and Active Output

ALF/ALFM/MTRVR Clip On Temperature Sensors with Passive and Active Output.

For the detection of temperatures at conduits, pipes and heaters.
The active clip-on sensor, model ALFM, transduces, in a temperature-linear manner, the temperature-dependent resistance of the sensor to a voltage signal of 0 - 10 V or to a current signal of 4 - 20 mA.
ALF - Clip on temperature sensor
ALFM - Clip on temperature sensor with measuring transducer 4 - 20 mA.
MTRVR - Clip n temperature sensor with measuring transducer 0 - 10 V.

Please contact us for the correct model for your application.

PF Room Pendulum Temperature Sensor

PF range

Room pendulum temperature sensor. For the detection of temperatures in larger rooms. Owing to its ball shape, it picks up temperatures from all directions within the room for a more representative measuring result. Model required depends on the sensor number which range from PT-100 to LM235Z.
Please contact us for the correct sensor for your application.

STF Room Radiation Temperature Sensor

STF range

Room radiation temperature sensor. A double sensor that enables the detection of temperatures developed by heat radiation sources that exist within rooms. The radiation sensor is intergrated in the black hemisphere while the room temperature sensor is located in the plastic housing.
Please contact us for the correct model for your application.

EKF Built In Duct Sensor

EKF range

Built in duct sensor for measuring temperatures in liquids and gases that flow in pipes, conduits, air ducts, or tanks.
When using in air, a special installation flange must be used (MF)when installing the sensor in an air duct.
For liquids, a nickel plated brass dip sleeve are required.
In aggressive media, the use of stainless steel (V4A) dip sleeves (THV) is recommended.
Dip sleeves and installation flanges are not included in standard delivery and must be ordered separately as accessories.
Please contact us for the correct model for your application.


Model required depends on the sensor number which ranges from PT-100 to LM 235Z. Please contact the office to determine which sensor would be the correct one for your equipment.

GFL Built In Duct Sensor

GFL range

GFL built in duct sensors are used to measure the temperature ofliquids and gases in pipes, air ducts or tanks.
A special installation flange (MF) is required when installing the sensor in an air duct.
If for liquids, then a nickel plated brass dip sleeve is required.
In aggressive media, the use of stainless steel (V4A) dip sleeves (THV/200) is recommended.
Dip sleeves and installation flanges are not included in standard delivery and must be ordered separately as accessories.
Please contact us for the model you require for your application.

EKFM Built In Duct Sensor

EKFM range

The EKFM Built in duct sensor is used to measure the temperature of liquids and gases in pipes, air ducts or tanks. The resistance of the sensor is temperature-dependent and is transformed linearly into a current signal of between 4 and 20 mA or a voltage signal of between 0 and 10 V. The transducer is calibrated for the following measureing ranges by default:
-50 to + 50 degrees C, 0 to + 50 degrees C
A special installation flange (MF) is required when installing the sensor in an air duct.
If the sensor is to be used in liquids, a nickel plated brass dip sleeve is required (THMs/200).
In aggressive media, the use of stainless steel (V4A) dip sleeves (THV/200) is recommended.
Dip sleeves and installation flanges are not included in standard delivery and must be ordered separately as accessories.
Please contact us for the correct model to suit your application.

IKF1 Industrial Built In Duct Sensor with Passive Output

IKF1 industrial Built In Duct Sensor (design b)

The IKFI industrial built in duct sensor is used to measure the temperature of liquids and gases in pipes, air ducts or tanks in industrial machines.
A special installation flange (MF) is required when installing the sensor in an air duct.
If the sensor is to be used in liquids, nickel-plated brass dip sleeves (THMs) are required
In aggressive media, the use of stainless steel (V4A) dip sleeves (THV) is recommended.
Dip sleeves and installation flanges are not included in standard delivery and must be ordered separately as accessories.
Please contact us for the model to suit your application.

IKF1 Industrial Built In Duct Sensor with Active Output

IKF1M range

Industrial built in duct sensor with active output and measuring transducer. For measuring temperatures in liquids or gases that flow in pipes, conduits, air ducts, reservoirs, tanks and containers used in the machine, apparatus and plant engineering sphere. For air, the MF installation flange is required. For liquids, a nickel plated dip sleeve is required. Model needed depends on the sensor tube size and the model output. Please contact the office to determine the correct sensor for your equipment.

MUD Pressure Measuring Transducer

MUD range of Pressure Measuring Transducers

For the measuring of pressures that occur in non-aggressive gasiform or liquid media used in the hydraulic, pneumatic, machine plant engineering and/or process technology sphere. The stainless steel membrane is absolutely vaccuum tight. The pressure sensors are maintenance free. (0 - 10 V or 4 - 20 mA)

MDEKD Differential Air Pressure Measuring Transducer

MDEKD-940.000 and 940.100 Differential Air Pressure Measuring Transducers

These microprocessor controlled pressure transducers are suitable for recording overpressure, negative pressure or differential pressure of non-aggressive gases
They can be used in heating,ventilation or air conditioning systems, clean room technologies and flow measurement.
Pressure is measured using a piezoresistive pressure sensor.
The MDEKD models replace the DF models.

MVEVK Compact Airflow Measuring Transducer

MVEVK-961.100 Compact Airflow Measuring Transducer

The MVEVK-961 is a compact air speed measuring transducer for mass applications. The compact design allows the sensor to be used for almost any application. The high quality thin film sensor element, based on the hot film anemometry principle, ensures best possible accuracy and a high level of sensitivity.

The flow sensor elements are less sensitive to dust and other contaminants than conventional hot wire anemometers, leading to excellent reproducibility and proven long term stability of results.

KLS Duct Air Quality Sensor

KLS Duct Air Quality Sensors

The air quality sensor serves for the requirement-depoendent ventilation of living spaces, office premises, meeting rooms, hotels or restaurants. It services for the quantitative evaluation of the pollution of the air in rooms with gases such as used up breathing air,tobacco some, solvent vapours, cleaning agents and car fumes. The room air sensed by the sensor is being transduced to an outpout signal of 0 - 10 V or 4 - 20 mA. A minimal value at output is interpreted as clean air, while a maximum value is valuated as strongly polluted air.
This air quality sensor is not suited for the execution of a selective CO2 measurement. The air quality sensor must not be used for any safety-relevant applications, no matter of what kind.

MLEVB Air Quality Sensor with Measuring Transducer & Room Temperature Measuring Transducer

MLEVB Air Quality Sensor

An air quality sensor with measuring transducer 0 - 10 V and room temperature measuring transducer 0 - 10 V. It services for the requirement-dependant ventilation of living spaces, office premises, meeting rooms, hotels or restaurants. It serves for the quantitative evaluation of the pollution of the air in rooms with gases, such as used up breathing air, tobacco some, solvent vapours, cleaning agents and car fumes.
Room air captured by the sensor is transformed into a 0 - 10 V output signal. A minimum value at output is interpreted as clean air, while a maximum value is evaluated as highly contaminated. In additon the room temperature in the range of 0 - 30 degrees C is continuously recorded and output as a 0 - 10 V signal.

This air quality sensor is not suited for the execution of a selective CO2 measurement. It must not be used for any safety-relevant applications, no matter of what kind.

MF / TF / FF / FTF Temperature and Humidity Measuring Transducers

MF/TF/FF/FTF ranges

Temperature and humidity measuring transducer (room and duct version).
Especially suited for use as a room or duct sensor within the refrigeration, air conditioning and ventilation engineering sphere or the process technology sphere.
MF RangeHumidity and temperature room sensors.
FF, TF and FTFduct sensors for humidity (FF), temperature (TF) or humidity/temperature (FTF).

AFT / ATFT Temperature and Humidity measuring Transducer for Outdoor Areas

AFT/ATFT Temperature and himidity measuring transducer for use in outdoor areas.

Especially suited for applications in the building automation, refrigeration, air conditioning and ventilating engineering or clean room technology sphere or for applications in greenhouses, medical spaces or for meteorological purposes.
(The compatible microprocessor controller is JDU-210.)