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  • New item   -9.76€Passive room temperature sensor | PT100 | IP30 | Sentera Controls | ROTSN-P100
    New item   -9.76€Passive room temperature sensor | PT100 | IP30 | Sentera Controls | ROTSN-P100 1
    New item   -9.76€Passive room temperature sensor | PT100 | IP30 | Sentera Controls | ROTSN-P100 2
    New item   -9.76€Passive room temperature sensor | PT100 | IP30 | Sentera Controls | ROTSN-P100 3
    New item   -9.76€Passive room temperature sensor | PT100 | IP30 | Sentera Controls | ROTSN-P100 4

    Passive room temperature sensor | PT100 | IP30 | Sentera Controls | ROTSN-P100

    Code: ROTSN-P100
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  • Product description

    Passive room temperature sensor | PT100 | IP30 | Sentera Controls | ROTSN-P100

    The ROTSN-P100 is a Sentera Controls passive room temperature sensor with a platinum PT100 element. It is a resistive sensor with no power supply or electronics: its resistance (100 Ω at 0 °C) increases linearly with temperature and is read by a controller, BMS or speed controller with a PT100 input.

    Key idea:
    The simplest and most reliable way to deliver room temperature to the automation: a flat wall-mounted housing with covered terminals, no power supply, no configuration – just two wires and the display to the controller's PT100 input.
    Sensing element
    PT100 (100 Ω at 0 °C)
    Accuracy class
    F0.3 (IEC 60751)
    Operating temperature
    -20…+60 °C
    Protection class
    IP30, wall-mounted

    Operating principle

    The ROTSN-P100 is mounted on the room wall with two Ø6 mm screws (hole spacing 104.5 mm). The sensor is connected to terminals T1 and T2, and the shield of the shielded cable (up to 1.5 mm²) is connected to the SH terminal and earthed only at the controller end, to reduce electromagnetic interference on longer runs.

    The sensor element is soldered to a printed circuit board in a plastic housing and measures the ambient air temperature. The resistance of the platinum PT100 element (100 Ω at 0 °C) rises with temperature according to the DIN / IEC 60751 characteristic; the controller passes a measuring current of 0.1–1.0 mA through the sensor and calculates the temperature from the voltage drop.

    Result – the controller or BMS receives the room temperature with F0.3 class accuracy (±0.30 °C at 0 °C … ±0.60 °C at 60 °C) with no power supply or settings. The sensor has no 0-10 VDC or Modbus output, so it suits only a controller with a PT100 input; for Modbus systems choose the DTS-M sensor with the DTS-MB-BK-ASM wall bracket.

    Benefits ROTSN-P100?
    No power supply, settings or programming needed – a PT100 sensor with accuracy class F0.3 and long-term stability (< ±0.04 %) has a long service life and is easy to replace.

    Technical specifications

    Product type Passive room temperature sensor (platinum resistance, RTD)
    Manufacturer / code Sentera Controls / ROTSN-P100
    Series ROTSN-P (PT100 / PT500 / PT1000)
    Sensing element PT100, nominal resistance 100 Ω at 0 °C
    Temperature coefficient Positive (resistance increases as temperature rises)
    Accuracy class F0.3 (DIN / IEC 60751); ±0.30 °C at 0 °C … ±0.60 °C at 60 °C
    Measuring current (DC) 0.1–1.0 mA
    Self-heating ≤ 0.8 K/mW
    Response time in water (t0.5 / t0.9) ≤ 0.2 s / ≤ 0.3 s
    Response time in air (t0.5 / t0.9) ≤ 1.5 s / ≤ 8.0 s
    Long-term stability Less than ±0.04 %
    Insulation resistance More than 10 MΩ
    Terminals T1, T2 – sensor; SH – cable shield
    Cable cross-section Up to 1.5 mm²
    Mounting 2 holes Ø6 mm, 104.5 mm apart
    Protection class IP30 (EN 60529)
    Operating environment -20…+60 °C, < 95 % rH non-condensing
    Dimensions (package, 1 pc.) 110 × 76 × 28 mm
    Weight 0.054 kg (net)
    Compliance LVD 2006/95/EC, DIN / IEC 60751, WEEE 2012/19/EU, RoHS 2011/65/EU

    Manufacturer documentation

    ✔ Recommended by Elektrotechnikos sprendimai

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

    Main functions

    • Platinum PT100 element – linear and standardized (IEC 60751) characteristic – no calibration needed.
    • Accuracy class F0.3 – ±0.30 °C at 0 °C, ±0.60 °C at 60 °C – sufficient for room climate control.
    • Long-term stability < ±0.04 % – readings do not drift even after several years.
    • Response time in air t0.9 ≤ 8.0 s – the controller quickly senses a change in room temperature.
    • Self-heating ≤ 0.8 K/mW – with a 0.1–1.0 mA measuring current, the sensor practically does not distort the readings.
    • Low-profile housing – does not clutter the interior, terminals are covered.
    • Shield terminal SH – easy to connect a shielded cable and reduce interference.
    • No power supply needed – no separate 24 V line to the sensor is needed.

    Where is it used?

    • Temperature measurement in offices and meeting rooms
    • School classrooms and lecture halls
    • Room heating and cooling control via a BMS
    • Ventilation unit controllers with a PT100 input
    • Residential building heating controllers
    • Hotel rooms and other dry rooms
    • Replacing existing PT100 room sensors during modernization

    On-demand operation

    For the BMS integrator.
    For a controller with a PT100 input, the sensor connects directly, without converters and without a separate power supply line.
    For service engineers.
    Replaces an old PT100 room sensor with the same IEC 60751 characteristic – no need to reprogram the controller.
    For the electrical installer.
    Two wires to T1, T2 and the shield to SH – installed in a few minutes, no configuration.

    Practical application

    If an office BMS controller has a PT100 input, then the ROTSN-P100 is connected with two wires to T1, T2 and with the shield to SH, and the controller receives the room temperature with class F0.3 accuracy (±0.40 °C at 20 °C) with no power supply at all.

    Application guide: how it is used in practice

    The ROTSN-P100 is used wherever the controller has a PT100 input – only the location and what the controller controls change:

    Site What is connected Result Installer's note
    Office, meeting room ROTSN-P100 → BMS controller PT100 input Heating / cooling is regulated according to the actual room temperature Install at a height of ~1.5 m, away from radiators and sunlight
    School classroom ROTSN-P100 → ventilation unit controller The supply air temperature is adjusted according to the room temperature Route the cable separately from 230 V lines
    Residential building ROTSN-P100 → heating controller with a PT100 input Room temperature is maintained without overheating Ground the shield (SH) on the controller side only
    Modernisation of an old system The existing PT100 sensor is replaced with ROTSN-P100 Same characteristic – no need to change the controller settings Check that the controller input is really PT100

    How to choose a sensing element

    Controller input type Recommended model
    PT100 (100 Ω at 0 °C) ROTSN-P100 (PT100, room) ← this model
    PT500 (500 Ω at 0 °C) ROTSN-P500 (PT500, room)
    PT1000 (1000 Ω at 0 °C) ROTSN-P1K0 (PT1000, room)
    Rule: the sensing element must match the controller input type (PT100, PT500 or PT1000) – otherwise the readings will be wrong. For long lines PT1000 is less sensitive to lead resistance than PT100. Always use a shielded cable.
    When to choose another solution: for a duct – TUTSN series (PT500 / PT1000, 150 or 250 mm); with a cable or for immersion in a thermowell – FLTSN series (PT100 / PT500 / PT1000 / NTC); when Modbus RTU is needed – DTS-M (duct) or DTP-M (strap-on).

    Pros

    • No power supply or settings needed
    • Standard PT100 element per IEC 60751
    • Accuracy class F0.3
    • Long-term stability < ±0.04 %
    • Low-profile housing, covered terminals
    • Shield terminal SH

    Cons / limitations

    • No 0-10 VDC or Modbus output – a controller with a PT100 input is required; for a Modbus system choose DTS-M with the DTS-MB-BK-ASM bracket
    • No display, buttons or setting knob
    • IP30 – only for dry rooms without condensation
    • Operating range only -20…+60 °C

    Safety and installation notes

    • Installation and connection are to be carried out by a qualified installer.
    • Use a shielded cable and earth the shield on the controller side only.
    • Do not install near heat sources, direct sunlight or draughts – the readings will be distorted.
    • IP30 – do not use in damp rooms or where condensation forms.

    Quick selection guide

    PT100
    Passive
    F0.3
    IP30
    Wall-mounted
    Suitable when you need:
    • to measure room temperature for a controller or BMS with a PT100 input;
    • to replace an old passive sensor of the same type;
    • to install a simple sensor without a separate power supply.
    Check before use:
    • the controller input type (PT100);
    • the cable length and whether it is shielded;
    • the installation location – whether there are no heat sources or condensate.
    Important reminder: The ROTSN-P100 has no active output – it works only together with a controller that has a PT100 input.

    FAQ

    Does the sensor need a power supply?
    No, it is a passive resistive sensor, and the measuring current is supplied by the controller.
    Can it be connected to a 0-10 VDC input?
    No, a controller with a PT100 input or a Modbus DTS-M sensor is required.
    What is the sensor accuracy?
    Accuracy class F0.3 ensures ±0.30 °C at 0 °C and ±0.60 °C at 60 °C.
    Which cable should I use?
    Use a shielded cable up to 1.5 mm² and connect the shield to SH and earth it at the controller end.
    Is the sensor suitable for a damp room?
    No, the protection class is IP30, so it is intended only for dry rooms without condensation.
    At what height should it be mounted?
    Mount at a height of about 1.5 m, away from radiators, direct sunlight and drafts.

    Passive room temperature sensor | PT100 | IP30 | Sentera Controls | ROTSN-P100

    Sentera ROTSN-P100 – passive room temperature sensor with a PT100 platinum element, accuracy class F0.3 and an IP30 wall-mounted housing, for controllers and BMS with a PT100 input.

    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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