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Ahlsell Products Electric Automation 29-45 38 Sensors, machine safetySurveillance relays, pressure guards

Surveillance relays, pressure guards

Level monitoring

Voltage/current monitoring

Temperature monitoring

Pressure guards

Other monitoring relays

Do you work with electrical service and automation in properties or workshops? Ahlsell helps you find the right products for you. Whether you work with commercial properties or private residences, we have the range for your needs. Here you will find contractors, buttons, sensors, safety switches, and accessories for easy installation. Learn more about our products here or visit your nearest Ahlsell store.

Products (37)

Thermistorrelä CM-MSS.xxS

Thermistorrelä CM-MSS.xxS

Art. no.: 3860728

The thermistor motor protection relays in the CM-MSx series are used to monitor the temperature in motors equipped with PTC temperature sensors. The PTC temperature sensors are integrated in the motor windings to measure the heating of the motor directly. This enables direct control and evaluation of different operating conditions. Depending on the product, the sensors can also be obtained with ATEX approvals for use in hazardous areas.

Thermistorrelä CM-MSS.xxS

Level pilot NP632

Level pilot NP632

Art. no.: 3829203

NP 632 consists partly of a floating body with a shock-safe fixed micro-switch with switching contact function, and a freely suspended weight-loaded cable. The pilot body, cable, and weight are surrounded by a sheath of vulcanized Hypalon. The weight that is attached as vulcanized on the cable is to keep the float body submerged, then the liquid level rises up to and above the pilot. In this respect the weight functions as a sinker around which the floating body can oscillate. In the pump control the smallest connection difference is 130 mm with which only one pilot is required. For greater connection differences two pilots are required, one for the switching on and one for switching off. If several pumps are used, a single pilot can be mounted for switching off.

Pressure switch TBE 3

Pressure switch TBE 3

Art. no.: 3828505

3 pole 10 A 400 V. Casing made of transparent polycarbonate and the bottom plate of light metal. For maximum overpressure 8 kp/cm².
Standard pressure: switching in 1-6 kp/cm², switching off 2-8 kp/cm².
Differential pressure: 1-2 kp/cm².
Cable outlet: 2 x M20

Pressure switch TBE 3

Pressure switch XMP without venting valve

Pressure switch XMP without venting valve

Art. no.: 3877110

3 pole, 20 A 500 v. Secure execution IP 65.
For pressure regulation between two pressure levels. Copes with hydraulic fluid, air, freshwater and salt water.
* = setting wheel to be ordered separately.

Pressure switch XMP without venting valve

Pressure switch XMP without venting valve

Nivåvippa PSN-X

Nivåvippa PSN-X

Art. no.: 3828037

Float rocker for level control. With an alternating contact. SEMKO approved for use up to 400V.
Contact load 1, 1kW, temperature range cable 60ºC, Liquid body 85°C

Current sensor H300-S6

Schneider Electric

Current sensor H300-S6

Art. no.: 3861446

The Schneider Electric H300-S6 is a switch that senses whether a current is flowing through a conductor. Limit value is fixed at 150mA AC max. Working voltage max 30VDC. Measuring range 0.15-60A VAC/DC. Temperature range -15°C - 60°C.

Pressure sensor electronic XML-G cylindrical 22.8 mm

Pressure sensor electronic XML-G cylindrical 22.8 mm

Art. no.: 3849930

Enclosure class: IP66 & IP67

Pressure sensor electronic XML-G cylindrical 22.8 mm

Pressure switch XML-A with fixed hysteresis and settings scale

Pressure switch XML-A with fixed hysteresis and settings scale

Art. no.: 3877312

Enclosure class IP66
Output contact 2 pole make+break function.

Pressure switch XML-A with fixed hysteresis and settings scale

Level control relay type CLP2F

Level control relay type CLP2F

Art. no.: 3864382

Relay for level control of conductive liquids, 11-pins socket connection - broader sensitivity!
The relay is used for regulation of conductive liquids where the level must be between a minimum and maximum value or where a level may not be above or below a maximum. When filling, Fill is selected (left scale] on the lower dial and when emptying, Empty (right scale) is selected. If only one level is desired, for example overfilling or dry running protection, use E38 644 20 and connect the electrodes on plinth 5-7 and bridge 5-6 and 7-11 (master). 7-11 shall always be breached for a system! With a cascade connection/indication of several levels (max 7 relays), refer to the products Swedish datasheet. All relevant data and the circuit diagram are clearly marked next to the relays.
Technical data:
Relay output 1alternating contact, AC1 8 A / 250 VAC (2500 VA)
Sensor voltage max 5 VAC, 2 mA
Sensor sensitivity Mode L (low sensitivity) 250-5kohm, Mode S (standard sensitivity) 50k-500kohm, fine adjustment of the upper potentiometer (the factory setting works in most cases, that is, Mode S and max on the upper potentiometer).
Reaction time approx. 1s
Operating temperature -20º to +50º C
Indication 2 LED, green light when the control voltage is connected, yellow light when the relay is closed.
Dimensions (mm) 36x81x60

Monitoring of phase sequence and phase failure control relay 3-phase

Monitoring of phase sequence and phase failure control relay 3-phase

Art. no.: 3864690

Functional description
The relay monitors that all three phases are live, and that the phase sequence is correct. The relay is on as long as these conditions are met. When monitoring engines, the relay falls when one of the phase-phase voltages is less than 85% of the other phase-phase voltages.
All relevant data, as well as the circuit diagram are clearly marked on the side of the relays

Monitoring of phase sequence and phase failure control relay 3-phase

Monitoring of phase sequence and phase failure control relay 3-phase

Voltage measurement relay 3-phase for over and under voltage

Voltage measurement relay 3-phase for over and under voltage

Art. no.: 3864692

3-phase monitoring relays for phase sequence/Phase break and Over-/Under Voltage for mounting on DIN rails or 11-pin base.
Functional description
The relay is pulled when the phases or the phases + 0 are within the set limits, the relay falls if the limit values are passed after the set time delay (0.1-30s). The relay also monitors phase breaks and phase sequence, at the wrong phase sequence or phase break the relay falls without time delay.
All relevant data, as well as the circuit diagram are clearly marked on the side of the relays.3 LEDs. Green lights up when the control voltage is connected. Yellow lights up when the relay is on and Red flashes during the time, and is lit with a steady light in alarm.

Accessories for float switch PSN-X

Accessories for float switch PSN-X

Art. no.: 3828033

Fits level rocker PSN-X

Accessories for float switch PSN-X

Load guard, power monitor BVN

Eldon Installation

Load guard, power monitor BVN

Art. no.: 3886032

Load switch for monitoring of 3 phases. With BVN one can lower the main fuse from e,g, 20 A to 16 A and thus obtain a lower fuse rate. BVN controls one or more groups which can be disconnected for short periods. One can e.g. choose to temporarily disconnect the water heater, electric cartridge or a number of electric radiators. BVN is intended to be mounted in standard central or as a separate unit for existing plants. BVN is also available as a complete unit including current transformers, enclosure and with contactor.

Monitoring relay RM17/35 3-phase

Schneider Electric

Monitoring relay RM17/35 3-phase

Art. no.: 3880370

Relays that can monitor phase presence, phase direction, asymmetry, under and over-voltage in three-phase systems.

Monitoring relay RM17/35 3-phase

Monitoring relay RM17/35 3-phase

Control relay RM17/35

Schneider Electric

Control relay RM17/35

Art. no.: 3880396

Relays for measuring over or under current within a range from 2mA to 20A.

Control relay RM17/35

Control relay RM17/35

Level sensor VN

Level sensor VN

Art. no.: 3864407

Level sensors for measuring the level in conductive liquids. 3 uninsulated electrodes, length 1 m, cut as required. 1 1/2" connection.

Level sensor A94-10

Level sensor A94-10

Art. no.: 3864420

Suspended sensor for level control in for example pools.

Monitoring relay DIA01

Monitoring relay DIA01

Art. no.: 3864560

Can monitor AC currents up to 6000 A when connected to a suitable power transformer.

Mains voltage monitoring relay 3UG

Mains voltage monitoring relay 3UG

Art. no.: 3860698

Network monitoring relay, phase failure and as a result settable 3x 160 to 690VAC 50 to 60 Hz undervoltage 160-690V hysterisis 1-20V to and tripping-delay. 0-20s 2 changing contacts spring clamp connection

Monitoring relay DIB

Monitoring relay DIB

Art. no.: 3864682

Monitoring current with a limit value (above / below), an output (SPDT). Adjustable hysteresis and time delay of potentiometer alarms. Mounting on DIN rail. Control voltage 115/230VAC

Monitoring relay MIC

Monitoring relay MIC

Art. no.: 3862157

Current relay MIC (2A-20A. Over/under current with integrated transformer). For checking overcurrent in AC networks via internal current transformer. The product requires operating voltage. The current conductor is pulled through the hole in the relay (current transformer) for measuring the AC current. The current transformer hole is 10mm. The MIC relay controls overcurrents. The relay pulls (closes) when the current exceeds the limit value shown on the front and drops (opens) when the current drops below the limit value. Operating voltage 24-240 V AC/DC.

Control relay RM22/35

Schneider Electric

Control relay RM22/35

Art. no.: 3860796

Control relay - monitoring of over and under current

Control relay RM22/35

Level relay DIN-assembly CLD2E

Level relay DIN-assembly CLD2E

Art. no.: 3860679

Compact level relay, 1 module (NORM / DIN). For filling or emptying water-based solutions with conductive sensors. Control between two levels with relay output. 24 - 240 VAC / DC operation.

Current monitoring relay 3UG4622

Current monitoring relay 3UG4622

Art. no.: 3872231

Current monitoring relay, 22.5mm with 0.05 to 10A AC / DC above and below 24VUC to 240V DC and AC 50 to 60 Hz time delay. at switch-on and current peaks 0 to 20s hysteresis 0.01 to 5A 1 alternating with or without fault memory screw connection

Temperature monitoring relay, RM35TMxx

Schneider Electric

Temperature monitoring relay, RM35TMxx

Art. no.: 3880380

Monitoring relay 3-phase, Presence of phase + phase sequence, engine temperature via PTC probe.

Temperature monitoring relay, RM35TMxx

Level sensor VN

Level sensor VN

Art. no.: 3864402

Level sensors for measuring the level in conductive liquids. 3 uninsulated electrodes, length 1 m, cut as required. 1 1/2" connection.

Level sensor VN

Level sensor VN

Sling detector LDP

Sling detector LDP

Art. no.: 3832483

Detects vehicles via a separately buried loop to control eg gates and barriers. The 2-channel detector can also detect direction by seeing which loop is passed first.

Level sensor VH1

Level sensor VH1

Art. no.: 3864400

Suitable for use in wells and pump pits together with our conductive level relays, eg 3860679.

Phase fault relay CM-PBE

Phase fault relay CM-PBE

Art. no.: 3860595

The CM-X series consists of relays for monitoring 1-phase voltage and current, 3-phase monitoring (over / undervoltage, phase sequence, phase error, phase imbalance, frequency), insulation, motor load, thermistor, temperature, fluid levels, cycles and contact protection. The series is available in 3 different enclosure types (E, S and N) and with options for screw or screwless connection to the terminals. All settings are available on the front of the products and can thus be made easily after assembly.

Phase fault relay CM-PBE

Temperature sensor QAC3171

Temperature sensor QAC3171

Art. no.: 9883171

Outdoor temperature sensor QAC31 .. is intended for use in heating, ventilation and air treatment plants such as:
LED value sensor for outdoor temperature-controlled control
Measuring sensors, e.g. for optimization, for measured value indication or for transfer of measured value to central control and monitoring system
High-quality sensor for sensing room temperature in commercial premises

Power relay EISH

Power relay EISH

Art. no.: 3860996

Compact relay for operation indication. Measures current with built-in transformer, up to 60A

Power relay EISH

DIN adapter for H3xx-S6

Schneider Electric

DIN adapter for H3xx-S6

Art. no.: 3861451

DIN Adapter for H3xx-S6 Mounting kit AH27-S6.

Current relay DIB

Current relay DIB

Art. no.: 3864564

Monitoring of current with a limit value (over/under), one output (SPDT). Adjustable hysteresis and alarm time delay with potentiometer. Mounting on DIN rail.

Nivåvakt 11-p 230VAC 2IN/2UT

Nivåvakt 11-p 230VAC 2IN/2UT

Art. no.: 3864380

Conductive level relay, 11-pole, 230VAC, 2vxl relay outputs. Max/min control when filling or emptying (automatic filling or draining) of conductive liquids between two levels.

Evaluation unit for speed monitoring DD0203

Evaluation unit for speed monitoring DD0203

Art. no.: 3860778

For detection of frequency, speed and rotation speed. Reliable overspeed or underspeed monitoring. Easy setting of switching points via potentiometer. Clearly visible LEDs to show operation, function, coupling status and release. Special space-saving design.

Current control relay RM

Schneider Electric

Current control relay RM

Art. no.: 3860797

Control relay - monitoring of over and under current - Measuring range 0.15A...15A - Supply voltage 24...240 V AC/DC - 2 C/O outputs

Control relay RM22T

Control relay RM22T

Art. no.: 3860779

Control relay RM22T

Control relay RM22T

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