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  • New item   -7.89€Passive temperature sensor with cable | PT500 | 4m | -20-60°C | IP65 | Sentera Controls | FLTSN-P500P400

    Passive temperature sensor with cable | PT500 | 4m | -20-60°C | IP65 | Sentera Controls | FLTSN-P500P400

    Code: FLTSN-P500P400
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  • Product description

    Passive temperature sensor with cable | PT500 | 4m | -20-60°C | IP65 | Sentera Controls | FLTSN-P500P400

    FLTSN-P500P400 – a Sentera Controls passive platinum PT500 temperature probe in a black ABS plastic tube with 4 m shielded cable, IP65. Intended for measuring temperature in HVAC systems, indoors and outdoors.

    Key idea:
    When the sensor has to be routed farther from the controller – outdoors, into a chamber or a thermowell – the 4 m shielded cable and IP65 probe make this possible without intermediate connections.
    Sensing element
    PT500 (500 Ω at 0 °C)
    Cable length
    4 m, shielded
    Operating temperature
    -20…+60 °C
    Protection class
    IP65

    Operating principle

    An acrylic-coated platinum PT500 element placed in a black ABS plastic tube with a 4 m two-core shielded 0.5 mm² cable (white sheath, tinned ends). Two-wire connection: the blue core is the sensor element, and the brown core is connected to the shield and reduces electromagnetic interference.

    The element resistance rises linearly with temperature: 500 Ω at 0 °C, ≈ 616 Ω at 60 °C (temperature coefficient 3850 ppm/K), so no calibration is needed; response time t0.9 ≤ 5 s at an airflow of 3 m/s.

    Result – a controller with a PT500 input receives the temperature with F0.3 class accuracy (±0.30 °C at 0 °C … ±0.60 °C at 60 °C) from a point up to 4 m away, with no intermediate connections. Thanks to IP65 the probe can also be used outdoors, but the operating range is limited to -20…+60 °C, and there is no active 0-10 VDC or Modbus output.

    Benefits FLTSN-P500P400?
    IP65 probe with 4 m shielded cable – one product suits indoors, outdoor air and a thermowell.

    Technical specifications

    Product type Passive temperature sensor with cable (platinum resistance, RTD)
    Manufacturer / code Sentera Controls / FLTSN-P500P400
    Series FLTSN-PxxxP (PT500 / PT1000, ABS probe, 1–16 m)
    Sensing element PT500, 500 Ω at 0 °C, ≈ 616 Ω at 60 °C
    Temperature coefficient 3850 ppm/K (0–100 °C)
    Accuracy class F0.3 (IEC 60751): ±0.30 °C at 0 °C … ±0.60 °C at 60 °C
    Response time t0.9 ≤ 5 s (3 m/s airflow)
    Long-term stability Better than ±0.04 %
    Probe Black ABS plastic tube, acrylic-coated element
    Cable 4 m, 2-core, shielded, 0.5 mm², white sheath, tinned ends
    Connection Two-core: blue – element, brown – shield
    Protection class IP65
    Operating environment -20…+60 °C, < 95 % rH
    Weight 0.16 kg (net, 1 pc.)
    Compliance LVD 2014/35/EU, EMC 2014/30/EU, WEEE 2012/19/EU, RoHS (EU) 2015/863

    Manufacturer documentation

    ✔ Recommended by Elektrotechnikos sprendimai

    Original manufacturer documentation – technical data, wiring diagrams and installation instructions.

    Main functions

    • Platinum PT500 element – linear characteristic per IEC 60751 (3850 ppm/K), no calibration needed.
    • IP65 ABS probe – suitable for rooms and outdoor air.
    • 4 m shielded cable – fewer disturbances, no intermediate connections.
    • Two-wire connection with a shield – blue wire – element, brown – shield; easy to connect.
    • Accuracy class F0.3 – ±0.30 °C at 0 °C … ±0.60 °C at 60 °C.
    • Fast response – t0.9 ≤ 5 s at an airflow of 3 m/s.
    • Long-term stability – better than ±0.04 % – readings do not drift.

    Where is it used?

    • Outdoor air temperature measurement (IP65)
    • Air handling unit ducts and chambers
    • Heating and cooling pipework up to +60 °C (with thermowell)
    • Buffer tanks and heat substations up to +60 °C
    • BMS temperature monitoring
    • Remote measuring points up to 4 m from the controller without junction boxes
    • Greenhouses, warehouses and farm buildings

    On-demand operation

    For heat substation installers.
    A 4 m shielded cable reaches the tank or piping from the controller cabinet without intermediate joints.
    For outdoor air sensor installers.
    The IP65 probe can be placed outside the wall, with the 4 m cable routed to the controller.
    For maintenance companies.
    A continuous shielded cable – fewer connections where faults occur.

    Practical application

    If the outdoor air temperature has to be measured on a north wall and the controller with a PT500 input is 3 m away indoors, then the FLTSN-P500P400 IP65 probe is mounted outdoors and the 4 m cable is routed in without joints.

    Application guide: how it is used in practice

    FLTSN-P500P400 is a universal probe with cable; it can be placed in a thermowell, fixed in a duct or in a room:

    Site What is connected Result Installer's note
    Heating substation, tank FLTSN-P500P400 in a thermowell → controller PT500 input The controller regulates according to water temperature Use thermally conductive paste in the thermowell
    Air handling unit chamber FLTSN-P500P400 in the airflow → controller Supply or outdoor air temperature measurement Secure the wire so that it is not strained
    Heating circuit FLTSN-P500P400 on the pipe surface → controller Return water temperature control Insulate the sensor location so that the readings are not reduced
    BMS modernization The existing PT500 probe is replaced with FLTSN-P500P400 Same characteristic – no need to change settings Check the controller's input type

    How to choose a sensing element and cable length

    Sensing element / probe / cable Recommended model
    PT100, stainless steel probe, 1 m FLTSN-P100-100 (PT100, 1 m)
    PT500, stainless steel probe, 1 m FLTSN-P500-100 (PT500, 1 m)
    PT500, stainless steel probe, 4 m FLTSN-P500-400 (PT500, 4 m)
    PT1000, stainless steel probe, 1 m FLTSN-P1K0-100 (PT1000, 1 m)
    PT1000, stainless steel probe, 4 m FLTSN-P1K0-400 (PT1000, 4 m)
    PT500, ABS probe, IP65, 1 m FLTSN-P500P100 (PT500, 1 m)
    PT500, ABS probe, IP65, 4 m FLTSN-P500P400 (PT500, 4 m) ← this model
    PT500, ABS probe, IP65, 8 m FLTSN-P500P800 (PT500, 8 m)
    PT500, ABS probe, IP65, 16 m FLTSN-P500P1K6 (PT500, 16 m)
    PT1000, ABS probe, IP65, 1 m FLTSN-P1K0P100 (PT1000, 1 m)
    NTC 3 kΩ (25 °C), 1 m FLTSN-N3K3A1-100 (NTC, 1 m)
    NTC 10 kΩ (25 °C), 1 m FLTSN-N1K4A1-100 (NTC, 1 m)
    Rule: the sensing element (PT100 / PT500 / PT1000 / NTC) must match the controller input, and for NTC – also its resistance characteristic. Choose a cable length that avoids splices; for extension use only a shielded cable.
    When to choose another solution: for a room – ROTSN series (wall-mounted housing); for a duct – TUTSN series (150 / 250 mm); when the controller accepts only Modbus RTU – DTS-M (duct) or DTP-M (strap-on).

    Pros

    • No power supply or settings needed
    • Standard PT500 characteristic
    • IP65 – also suitable outdoors
    • Factory-fitted 4 m shielded cable
    • Accuracy class F0.3
    • Long-term stability

    Cons / limitations

    • No 0-10 VDC or Modbus output – a controller with a PT500 input is required; for a Modbus system choose DTS-M or DTP-M
    • Operating range -20…+60 °C – not suitable for hotter media
    • The thermowell is not included in the kit
    • The plastic (ABS) probe is mechanically less robust – for a sturdier solution there is the FLTSN-P series with a stainless steel probe

    Safety and installation notes

    • Installation and connection are to be carried out by a qualified installer.
    • For extension use only a shielded cable, routed separately from 230 V lines.
    • Do not exceed the operating temperature of -20…+60 °C and < 95 % rH non-condensing.
    • Secure the cable so that it is not strained or damaged.

    Quick selection guide

    PT500
    4 m
    IP65
    Passive
    With cable
    Suitable when you need:
    • to measure temperature for a controller with a PT500 input;
    • to install a sensor in a thermowell, duct or on a surface;
    • to replace an old probe of the same type.
    Check before use:
    • the controller input type (PT500);
    • the required cable length;
    • the medium temperature – whether it does not exceed +60 °C.
    Important reminder: FLTSN-P500P400 is a passive sensor; it works only with a controller that has a PT500 input.

    FAQ

    Is a power supply needed?
    No, it is a passive resistive sensor, and the measuring current is supplied by the controller.
    What is the cable length?
    The factory-fitted shielded cable is 4 m, and the series comprises 1, 4, 8 and 16 m variants.
    Can the cable be extended?
    Yes, use a shielded cable for extension.
    What is the operating temperature range?
    The probe operates within -20…+60 °C.
    Can it be used outdoors?
    Yes, the probe is IP65, but the operating range is limited to -20…+60 °C.
    How does it differ from FLTSN-P500-100?
    The FLTSN-PxxxP has an ABS probe with IP65 and longer cables, while the FLTSN-P series has a stainless steel tube.

    Passive temperature sensor with cable | PT500 | 4m | -20-60°C | IP65 | Sentera Controls | FLTSN-P500P400

    Sentera FLTSN-P500P400 – passive PT500 temperature probe with a 4 m shielded cable, IP65 ABS tube and accuracy class F0.3 for HVAC controllers.

    Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.

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