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Brand: SAUTER
Sauter EGT346F103 Ni1000 Duct Temperature Sensor 100 mm
Description
The EGT346F103 is a passive duct temperature sensor from Sauter with a Ni1000 measuring element on a 100 mm stainless-steel stem. It measures supply, return and extract air in ventilation ducts, and with an immersion sleeve it can also read liquid temperature in hot-water and chilled-water pipes, over a range of -50 to 160 degrees C in an IP65 housing.
A two-wire sensor for air handling and pipe work
Passive sensors such as the EGT346 give a controller the raw resistance of a nickel element, so the controller does the scaling and no supply voltage is needed. The Ni1000 element follows DIN 43760 with 1000 ohm at 0 degrees C and a positive temperature coefficient: resistance rises in a linear manner as temperature rises. The EGT family covers three element and length variants, and the F103 type with the 100 mm stem is the standard length for duct work.
Key features from the datasheet
- Passive measurement of air, gas and fluid temperatures in HVAC building systems up to 160 degrees C
- Humidity- and corrosion-proof sensor in a V4A stainless-steel immersion pipe, Ø 6 mm
- IP65 housing in UL94-V0 polycarbonate; usable in damp and dusty environments
- Removable cable gland and plug-in terminal block allow wiring away from the sensor and quick replacement
- Hinged cover opens without tools; optional cover screw secures against tampering
- Optional LW 7 thermowell allows use in pipes and pressure vessels up to 40 bar
Technical specification
| Parameter | Specification |
|---|---|
| Type | EGT346F103 |
| Measuring element | Ni1000 to DIN 43760 |
| Nominal resistance | 1000 Ω at 0 °C |
| Accuracy of the element | ±0.3 K typ. at 21 °C |
| Measuring range | -50 to 160 °C |
| Sensor tube length | 100 mm (Ø 6 mm stainless steel V4A) |
| Recommended measurement current | Typ. below 1 mA |
| Time constant in moving air (3 m/s) | 35 s (t63) |
| Time constant in still air | 155 s (t63) |
| Time constant in still water | 9 s (t63); 17 s with brass thermowell; 20 s with stainless thermowell |
| Ambient temperature | -35 to 90 °C |
| Storage and transport temperature | -35 to 90 °C |
| Humidity | 85 % rh, non-condensing |
| Housing | Polycarbonate UL94-V0, black/yellow, 65 × 41 × 70 mm without tube and gland |
| Cable inlet | M20 for cable Ø 4.5 to 9 mm, removable |
| Connection | 2-conductor, plug-in terminal, max. 2.5 mm² |
| Type of protection | IP65 (EN 60529) |
| Weight | 115 g |
| Conformity listed | RoHS 2011/65/EU and 2015/863/EU, EN IEC 63000 |
The stated accuracy applies to the measuring element only; the cable length also affects the actual result.
Selection and ordering guide
The EGT range has Ni1000 and Pt1000 elements. The two element types are interchangeable within the stated accuracy, so match the type to what the controller expects.
| Order code | Element | Stem length | Range | Weight |
|---|---|---|---|---|
| EGT346F103 | Ni1000 | 100 mm | -50 to 160 °C | 115 g |
| EGT346F203 | Ni1000 | 150 mm | -50 to 160 °C | 126 g |
| EGT347F103 | Ni1000 | 200 mm | -50 to 160 °C | 133 g |
| EGT348F103 | Ni1000 | 450 mm | -50 to 160 °C | 176 g |
| EGT446F103 | Pt1000 | 100 mm | -50 to 160 °C | 114 g |
| EGT447F103 | Pt1000 | 200 mm | -50 to 160 °C | 133 g |
| EGT392F102 | Ni1000 | 100 mm | -50 to 260 °C | 105 g |
The EGT392 is the high-temperature variant, in die-cast aluminium with an M16 inlet and a stem rated to 16 bar.
Installation notes
- Never mount with the cable gland facing upwards, as condensate or dripping water could damage the sensor; if condensate can form in the tube, fit so that it drains.
- In ducts, fix to the duct wall with the mounting clip supplied or with flange 0300360003 for variable immersion length.
- In water pipes and pressure vessels use an LW 7 thermowell (see Sauter sheet 39.100) and fill the gap with heat-conducting paste 0300360004.
- Install against the flow and at least 50 cm from a valve or pump.
- With compression fitting 0300360000 the sensor can be fitted directly in pipes up to 16 bar without a thermowell.
- Use shielded signal cable, route it away from power cables, and compensate line resistance in the controller for long runs.
Applications in Gulf building services
Oman and the GCC rely on large air-handling units with long ducts, so duct sensors are needed for supply-air, mixed-air and return-air control, frost and overheat monitoring, and for chilled-water coil protection. The IP65 housing handles dusty plant rooms and roof-mounted units, and the Ni1000 signal is read by most building controllers. The datasheet forbids use in fire protection systems or medical facilities, so keep it to comfort and process-support control.
Selection and installation notes
A building automation device is selected from the signal type, the supply voltage, the mounting position and the system it connects to. Check the wiring diagram and the cable type, keep sensor cables away from power wiring, confirm the addressing or scaling in the controller, test each point at commissioning and record the final settings. Use the mounting accessories and the installation position given in the data sheet.
A duct sensor must reach the air stream, so mount it where the air is mixed and away from coils or heaters that would affect the reading.
Information needed for a quotation
Send the full model code, the quantity, the delivery location in Oman or the GCC, the intended use and any accessories needed, so that the complete package can be quoted together.
Documents and supply information
The manufacturer data sheet is attached to this page and should be read together with the project specification and the site risk assessment before a purchase is confirmed. Ratings, standards and dimensions are quoted as printed on that sheet. Lead time, stock position and certificates available with the shipment are confirmed in the quotation, and we supply to Oman and the wider GCC region for industrial, utility and building services projects.
Accessories and related items
| Accessory | Description |
|---|---|
| 0300360000 | Compression fitting G¼”, stainless steel, up to 16 bar |
| 0300360003 | Mounting flange Ø 6 mm, plastic, for flexible immersion length |
| 0300360004 | Heat-conducting paste, dosing syringe, 2 g |
The delivery includes a mounting clip, self-adhesive seal, mounting set with dowels and screws, M20 cable gland and removable terminal block.
Frequently asked questions
What element does the EGT346F103 use?
A Ni1000 nickel element to DIN 43760, 1000 ohm at 0 degrees C with a positive temperature coefficient.
What is the sensor accuracy?
The element accuracy is plus or minus 0.3 K at 21 degrees C; actual accuracy also depends on cable length and line resistance.
Can it measure water temperature?
Yes, with an LW 7 thermowell fitted in the pipe and heat-conducting paste in the gap; with the compression fitting it can also be fitted directly in pipes up to 16 bar.
Is it suitable for fire protection or medical use?
No. The datasheet lists fire protection systems and medical facilities as improper use.
Who supplies the EGT346F103 in Oman?
Seven Star LLC is an independent supplier in Muscat and quotes against the exact order code. Confirm element type, stem length and accessories before ordering.
Documents and quotation
The official Fr. Sauter AG product data sheet 31.111 for the EGT 346 to 348, 392, 446 and 447 (2025) is linked on this page. Send the order code, quantity and installation details to request a quotation. See more in Temperature Instrumentation.
Datasheets & Documents
- Datasheet Sauter EGT 346...348, 392, 446, 447 product data sheet 31.111 (PDF, 2025) Download
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About brand
SAUTER is a Swiss building automation company, founded in 1910 by Fritz Sauter in Grindelwald, where he made timers to switch street lights. The company moved to Basel in the 1910s, where it is still headquartered, and in 1935 turned toward control technology. Its first software-controlled building management system followed in 1974. SAUTER is privately owned by the founding families.
Seven Star LLC is an independent supplier in Muscat. We list SAUTER field devices against exact order codes and the official SAUTER data sheets, for HVAC contractors and facility teams in Oman and the GCC.
SAUTER company profile
| Founded | 1910, Grindelwald, Switzerland, by Fritz Sauter |
|---|---|
| Headquarters | Basel, Switzerland |
| Ownership | Founding families, privately held |
| First products | Timers for street lighting |
| Product families | EY-modulo automation stations, SAUTER Vision Center building management software, ecos room controllers, control valves and valve actuators, damper actuators, temperature, humidity and pressure sensors |
Milestones
- 1910: Fritz Sauter starts making timers in Grindelwald.
- 1935: SAUTER moves into control technology.
- 1974: The first software-controlled building management system is introduced.
SAUTER product series
Valves and actuators include the VUG050F304 DN50 flanged control valve, the VKAI032F300 DN32 cut-off ball valve, the AKM115F120 rotary actuator for ball valves and the ASF112F222 spring-return damper actuator.
Sensors and controllers include the EGP100F412 differential pressure transducer, the EGQ222F032 CO2 and temperature room transducer, the EGT346F103 Ni1000 duct temperature sensor and the NRFC413MF111 Modbus fan coil thermostat. Safety devices include the TUC407F001 safety temperature limiter to EN 14597 and the DSF158F001 stainless pressure switch with SIL 2.
Where SAUTER products are used
Air handling units and fan coils, chilled and hot water circuits, boiler plants and room control in hotels, hospitals, offices, schools and laboratories connected to a building management system.
SAUTER products we list
Ordering SAUTER products: what we need
Send the full SAUTER order code, such as VUG050F304. If unknown, give the valve size, Kvs and pressure rating, the actuator torque or force, control signal and supply voltage, and for sensors the range, output and mounting.
Facts checked against SAUTER's own history page (sauter-controls.com), October 2026.
Browse SAUTER products by category: Valve Actuators.
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Frequently Asked Questions
What element does the EGT346F103 use?
A Ni1000 nickel element to DIN 43760, 1000 ohm at 0 degrees C with a positive temperature coefficient.
What is the sensor accuracy?
The element accuracy is plus or minus 0.3 K at 21 degrees C; actual accuracy also depends on cable length and line resistance.
Can it measure water temperature?
Yes, with an LW 7 thermowell fitted in the pipe and heat-conducting paste in the gap; with the compression fitting it can also be fitted directly in pipes up to 16 bar.
Is it suitable for fire protection or medical use?
No. The datasheet lists fire protection systems and medical facilities as improper use.
Who supplies the EGT346F103 in Oman?
Seven Star LLC is an independent supplier in Muscat and quotes against the exact order code. Confirm element type, stem length and accessories before ordering.
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