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Duct Sensors Climate+Air Quality


Immersion sensor for temperature measurement of gases and liquids in HVAC applications. The sensor can be optionally screwed directly into a bonded pocket (see accessories). Types SFKH02+ with a 70 mm neck pipe are designed for applications with insulation materials. The measuring insert can be exchanged without disassembling the entire sensor. Models with a relay output for a 2-point controller or a 2-stage 2-point controller and color-changing LCD allow for a wide range of applications. A hinged cover and tool-free wiring as well as removable cable entries ensure a quick and easy installation.

Application/type Immersion sensor, Duct sensor
Purpose Measure values
Measured values temperature
Interface RS485 Modbus, RS485 BACnet, LON FT, Passive, Active, 0..5 V, 0..10 V, 4..20 mA, Switch contact
Configuration USEapp, uConfig, BUS, jumper, DIP switches, (depending on type)
Sensor SI-Protection against permeation of humidity and mechanical stress (e.g. vibration), PT1000 DIN Kl. B, PT100 DIN Kl. B, PT1000 1/3 DIN, PT100 1/3 DIN, Ni1000 DIN Kl. B, Ni1000TK5000, NTC10k, NTC10k Precon, NTC20K, NTC1,8K, LM235Z, passive
Output voltage 0..10 V or 0..5 V, adjustable via jumper, live-zero configuration via app or uConfig, min. load 5 kΩ, min. load 10 kΩ
Output current 4..20 mA, max. load 500 Ω
Output switch contact 2x floating contact NO for 24 V ~ or 24 V = / 3 A
Network technology RS485 Modbus, RS485 BACnet (MS/TP), LON FT (free topology)
Data transmission RTU, half-duplex, baud rate 9.600, 19.200, 38.400 or 57.600, parity: none (2 stop bits), even or odd (1 stop bit)
Operating range temperature (°C) -80..+260
Operating ranges temperature (°C) -50..+120, -50..+150, -50..+160, -80..+260
Output signal temperature scaling analogue output, 0..+160 °C (default setting), -20..+80 °C (default setting), selectable from 4 temperature ranges -50..+50 | -20..+80 | -15..+35 | -10..+120 | 0..+50 | 0..+100 | 0..+160 | 0..+250 °C, adjustable at the transducer, optionally configurable
Operating range temperature enclosure (°C) -35..+70, -35..+90, -20..+70
Operating range humidity max. 85% rH short term condensation
Accuracy temperature ±0,5 K (typ. at 21 °C), within default measuring range, ±0,1 K (typ. at 0 °C), ±0,3 K (typ. at 0 °C), ±0,4 K (typ. at 0 °C), ±0,22 K (typ. at 25 °C), potentiometer for offset adjustment, offset setting via app or uConfig
Power supply 15..24 V = (±10%) SELV, 15..35 V = SELV, 24 V ~ (±10%) SELV, 19..29 V ~ SELV
Power consumption typ. 0,4 W (24 V =), typ. 0,7 W (24 V =), max. 0,5 W (24 V =), max. 2,5 W (24 V =), 0,8 VA (24 V ~), 1,8 VA (24 V ~), 4,3 VA (24 V ~)
Material in touch with media Sensor probe, Ø=8 mm, stainless steel V4A (1.4571), G1/2", Neck pipe, (optionally), stainless steel V2A (1.4305), Ø=12 mm, length 70 mm, suitable for usage in aggressive media
Installation length (mm) 50, 100, 150, 200, 250, 450
Display LCD 29x35 mm, RGB backlight, with traffic light function, threshold values configurable, optionally configurable via app or uConfig
Enclosure USE-S, impact- and shock-resistant enclosure with quick-release cover, PC, USE-M, impact- and shock-resistant enclosure with quick-release cover, PC
Colour pure white, transparent cover
Protection (IP) IP65, according to EN 60529
Connection removable cable entry flextherm M20 for wire Ø=4,5..9 mm, removable cable entry M25 with fourfold cable entry for wire with max. Ø=7 mm, removable plug-in terminal, max. 2,5 mm², BUS max. 1,5 mm², relay max. 1,5 mm²
Connection cable 2-wire, 3-wire, 4-wire
Delivery content incl. mounting set (screws and accessories)
Comparison list