Name: iTHERM CompactLine TM311
Brand: Endress+Hauser
Availability: InStock

iTHERM CompactLine TM311 Compact thermometer

Metric/imperial RTD 4-20 mA/IO-Link compact thermometer for industrial and hygienic applications

Platinum RTD sensor Pt100 with IO-Link and elbow pipe element

Application picture of TM311 in a hygienic process of a plant

Compact Pt100 sensor TM311 with IO-Link

Compact Pt100 sensor iTHERM CompactLine TM311 with IO-Link and elbow pipe element for clean operations

Suitable for aseptic processes

Explained in under 2 minutes - iTHERM CompactLine TM311

Have questions about this product?

iTHERM CompactLine TM311 Compact thermometer

Metric/imperial RTD 4-20 mA/IO-Link compact thermometer for industrial and hygienic applications

Get a quote

Save to list *Saved to list

Benefits

Fast installation and easy commissioning: - Compact dimensions for installation in tight spaces - Standard M12 connector with IP69 for easy electrical connection - Recommended process immersion lengths for optimum measurement - Preset temperature range
Excellent temperature measurement performance: - Short response times as low as 1.5 s (t90) - High sensor accuracy even with short immersion lengths - Improved measuring accuracy with transmitter-sensor matching
Safe and reliable operation: - Device safety to EN 610101-1 and CSA C/US - Electromagnetic compatibility (NAMUR NE 21) - Device diagnostic information (NAMUR NE 43) - Hygienic design manufactured from high-grade stainless steel - Marine approval

Integrated technologies

Services and resources

Product Support Product documentation, troubleshooting articles, device details and more.

FLEXible answers to individual needs

Current product

iTHERM CompactLine TM311 Compact thermometer

Simple products
Easy to select, install and operate

What is FLEX?

FLEX selections

Technical excellence

Simplicity

Fundamental selection Meet your basic measurement needs

Lean selection Handle your core processes easily

Extended selection Optimize your processes with innovative technologies

Xpert selection Master your most challenging applications

Variable

Learn more about the FLEX selections

5-year warranty

Engineered for Confidence

Our Fundamental Selection instruments feature an extended 5-year warranty – a clear testament of our trust in their long-term reliability and performance.

Should a warranty case occur, you can count on a fast replacement process and minimal administrative effort – giving you peace of mind when it matters most and helping you keep your operations running smoothly.

Warranty terms apply

The extended warranty is subject to specific conditions. For full details, please refer to the locally applicable General Terms and Conditions (GTC), which can be found on the respective country page of our website.

Services by your side

Right‑first‑time commissioning, worldwide

Endress+Hauser’s qualified service engineers ensure your measurement devices are commissioned right the first time, delivering application‑aligned accuracy, regulatory compliance, and operational confidence from startup onwards, anywhere in the world.

Remote support you can trust wherever you operate

With Endress+Hauser Smart Support, you benefit from faster issue resolution, higher uptime, reliable global expertise across the entire product lifecycle – and lasting peace of mind.

Committed to long‑term, sustainable performance

With deep field expertise, harmonized processes, and continuous monitoring, we accompany you with comprehensive service offerings – from initial start‑up through instrumentation maintenance to process optimization – as a true lifetime partner delivering improved outcomes.

For additional information, please contact your local Endress+Hauser representative.

Learn more

24/7 customer portal

Personalized transaction space

Check prices and delivery times, save your favorite products, create quotes and place orders in just a few clicks and track deliveries at any time. With access to your complete order and quote history including all relevant documents you benefit from full transparency throughout the entire process.

Easy access to technical documentation

Select and download all technical documentation such as operating manuals, calibration certificates, approvals and CAD drawings conveniently bundled as a complete documentation package for your entire order or quote.

My Endress+Hauser – all in one place

My Endress+Hauser is your 24/7 connection to Endress+Hauser – in the office, in the field or on the go. It brings together transaction management, documentation and software downloads, knowledge base access, customer support, engineering tools and cloud‑based IIoT services helping you work easier, faster and more efficiently.

Technology

IO-Link communication

IO-Link communication helps to digitalize your plant

More information

Have questions about this product?

Selection of compatible products

Product picture loop-powered indicator RIA15

RIA15 process indicator

Loop-powered Ex ia process indicator as field or control panel device for 4 to 20 mA signals or HART®protocol

RN42 active barrier

Active barrier, 1 channel for 4 to 20 mA, HART® transparent with 24 to 230 V AC/DC as well as active/passive input and output, optionally with SIL and Ex

FieldPort SFP20

USB modem for the configuration of IO-Link devices

Loop-powered process indicator RIA16 for field mounting

RIA16 process indicator

Loop-powered Ex ia process indicator as field device for 4 to 20 mA signals, HART® transparent

RN22 intrinsically safe isolating barrier, power supply and signal doubler for hazardous areas

RN22 active barrier

Active barrier, 1/2-channel/SD for 4 to 20 mA, HART® transparent with 24 V DC as well as active/passive input and output, optionally with SIL and Ex

Spare parts and accessories

further parts

O-ring 14.9x2.7 VMQ, FDA, 5 pcs.

further parts

Order code 52021717

further parts

O-ring 21.89x2.62 VMQ, FDA, 5 pcs.

further parts

Order code 52014473

further parts

O-ring 28.17x3.53 VMQ, FDA, 5 pcs.

further parts

Order code 52014472

further parts

Profile gasket 29x36x3.7, FDA, 5 pcs.

further parts

Order code 52014424

Spare parts & accessories

Choose from our suggested options

Looking for more options?

Use the extended configuration to configure from all available options.

<%label%>

<%feature%>

<%coding%>

<%label%>

<%coding%>

<%label%>

<%feature%>

<%message%>

Looking for more options? Use extended configuration

Size and configure based on application parameters Start sizing

Order code

Add to cart

More actions

Only available on our desktop experience

Use extended configuration

Start sizing

Configuration details

Pt100 temperature sensor - iTHERM CompactLine TM311

iTHERM TM311

Section	ID	Selected option
<%feature%>	<%coding%>	<%label%>

CAD Drawings

Configuration support

Spare parts and accessories

further parts

O-ring 14.9x2.7 VMQ, FDA, 5 pcs.

further parts

Order code 52021717

further parts

O-ring 21.89x2.62 VMQ, FDA, 5 pcs.

further parts

Order code 52014473

further parts

O-ring 28.17x3.53 VMQ, FDA, 5 pcs.

further parts

Order code 52014472

further parts

Profile gasket 29x36x3.7, FDA, 5 pcs.

further parts

Order code 52014424

Spare parts & accessories

Selection of compatible products

RIA15 process indicator

Loop-powered Ex ia process indicator as field or control panel device for 4 to 20 mA signals or HART®protocol

RN42 active barrier

Active barrier, 1 channel for 4 to 20 mA, HART® transparent with 24 to 230 V AC/DC as well as active/passive input and output, optionally with SIL and Ex

FieldPort SFP20

USB modem for the configuration of IO-Link devices

RIA16 process indicator

Loop-powered Ex ia process indicator as field device for 4 to 20 mA signals, HART® transparent

RN22 active barrier

Active barrier, 1/2-channel/SD for 4 to 20 mA, HART® transparent with 24 V DC as well as active/passive input and output, optionally with SIL and Ex

Accuracy	class A acc. to IEC 60751
Response time	t50 = 1 s t90 = 1.5 s
Max. process pressure (static)	at 20 °C: 50 bar (725 psi)
Operating temperature range	PT 100: -50 °C ...200 °C (-58 °F ...392 °F)
Max. immersion length on request	up to 600,00 mm (23,62'')
Measuring principle	Resistance Temperature Detector
Characteristic / Application	metric and imperial style compact temperature probe fast response time high accuracy standard and hygienic design hygienic process connection threaded process connection
Thermowell / protection tube	without incl. thermowell incl. Tee-/elbow thermowell
Insert / probe	pipe version, isolated wires, not flexible
Outer diameter protection tube / Insert	3,0 mm (0,12'') 6,0 mm (0,24'')
Material protection tube/ thermowell	1.4435 Delta-Ferrit < 1% 316L
Process connection	compression fitting Thread weld in adapter clamp connections acc. to ISO2852 screwed pipe joint acc. to DIN 11851 aseptic screwed pipe joint acc. to DIN 11864-1 metallic sealing system thread acc. to ISO 228 for liquiphant adaptor Varivent SMS 1147 Tee-/elbow thermowell
Tip shape	straight reduced
Surface roughness Ra	0,76 μm (29,92 μin) 0,38 μm (14,96 μin) 0,38 μm (14,96 μin) electropolished
Integration head transmitter	no (4…20mA Signal, IO-Link)
Ex - approvals	CSA C/US
Certification	3A, EHEDG, ASME BPE, FDA, TSE 1935/2004, 2023/2006, 10/2011 DNV, BV RCM

iTHERM CompactLine TM311 Compact thermometer

iTHERM CompactLine TM311 Compact thermometer

iTHERM CompactLine TM311 Compact thermometer

Product information

Selection of compatible products

Spare parts and accessories

Choose from our suggested options

Spare parts and accessories

Selection of compatible products

My Endress+Hauser

Products & Services

Industries

Support

Company

iTHERM CompactLine TM311 Compact thermometer

iTHERM CompactLine TM311 Compact thermometer

iTHERM CompactLine TM311 Compact thermometer

Product information

Selection of compatible products

Spare parts and accessories

Choose from our suggested options

Spare parts and accessories

Selection of compatible products

Products & Services

Industries

Support

Company

We value your privacy