WIKA TSD-30 Electronic Temperature Switch

Fits local switching and optional analogue feedback on process temperatures where you want a stainless probe, M12 connector, and a 14-segment LED display — not a bare mechanical thermostat.

Key advantages

Pt1000 electronic switch — Standard −20…+80 °C; optional −20…+120 °C or 0…+150 °C with compression fitting.
PNP/NPN + analogue options — 1–2 switching outputs; optional 4…20 mA / 0…10 V; optional IO-Link rev 1.1.
LED display — 14-segment red LED, 4-digit, rotatable display/case >300°.
IP65/IP67 when mated — M12×1 connector; stainless 1.4571 probe; CE, UL, EAC, GOST, CRN.

Typical applications

Machine and skid temperature interlocking with local LED indication.
PLC loops needing switch contacts plus optional 4…20 mA / 0…10 V feedback.
Duties where probe length 25…350 mm and G/NPT process connections must match the thermowell or boss.

Selection guide

Measuring range — Standard −20…+80 °C; option −20…+120 °C or 0…+150 °C (compression-fitting connections). Lock the range to the process max, not just the alarm set point.
Sensor — Pt1000 (response time per DIN EN 60751). Sensor error ±(0.15 K + 0.002 |t|).
Accuracy — Analogue ≤ ±0.5 % of span + temperature sensor error; switching ≤ ±0.8 % of span + sensor error.
Outputs — PNP (or NPN) switching, 1–2 outputs; optional 4…20 mA or 0…10 V analogue; optional IO-Link (rev 1.1).
Supply — DC 15…35 V.
Process connection — G¼A, G½A; ¼ NPT, ½ NPT; with or without compression fitting.
Probe length — 25…350 mm options. Sheath / wetted: stainless steel 1.4571.
Response time — T05 < 5 s; T09 < 10 s (per DIN EN 60751).
Ambient — −20…+80 °C (limited to −20…+40 °C if medium >80 °C).
Electrical — M12×1 circular connector (4-pin or 5-pin); 3-wire.
Display / housing — 14-segment red LED, 4-digit, 9 mm. Case stainless steel; display head PC+ABS; window PC. Display/case rotatable >300°.
IP — IP65 and IP67 when mated.
Weight — approx. 0.3 kg.
Approvals — CE (EMC EN 61326, RoHS), UL, EAC, GOST, CRN. No hazardous-area rating published for this model.

Common mistakes

Specifying standard −20…+80 °C when the process needs the −20…+120 °C or 0…+150 °C option (compression fitting).
Ignoring the ambient derate: if medium >80 °C, ambient is limited to −20…+40 °C.
Ordering one switching output when the interlock needs two; or skipping the analogue option when the PLC also needs 4…20 mA / 0…10 V.
Undersizing probe immersion / length (25…350 mm options) so the tip sits in a dead zone.
Assuming Ex / hazardous-area approval — no hazardous-area protection is published for TSD-30; use another model if the area is classified.
Leaving the M12 unmated and expecting IP67 — IP65/IP67 apply when mated.

When to RFQ / what to tell us

Measuring range needed (−20…+80 °C std vs optional ranges) and set / reset points.
Media, process temperature, and required probe length / immersion.
Process connection (G or NPT, compression fitting yes/no).
Outputs: PNP vs NPN, one or two switches, analogue and/or IO-Link.
Supply voltage available (must fit DC 15…35 V), ambient, IP need, required marks (UL, CRN, etc.), quantity, ship-to country.

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Specs

Spec	Value
SKU	40302
Brand	WIKA
Model	TSD-30
Product type	switch
Measuring range	Standard −20…+80 °C; option −20…+120 °C or 0…+150 °C (compression-fitting connections)
Sensor type	Pt1000 (OEM brochure/OI confirm; TE 67.03 response time per DIN EN 60751)
Accuracy	Analogue ≤ ±0.5 % of span + temperature sensor error; switching ≤ ±0.8 % of span + sensor error; sensor error ±(0.15 K + 0.002
Output signal	PNP (or NPN) switching 1–2 outputs; optional 4…20 mA or 0…10 V analogue; optional IO-Link
Supply voltage	DC 15…35 V
Process connection	G¼A, G½A; ¼ NPT, ½ NPT; with or without compression fitting
Stem / probe length	25…350 mm probe length options
Sheath material	Stainless steel 1.4571 (probe / wetted)
Housing material	Case stainless steel; display head PC+ABS; window PC
IP rating	IP65 and IP67 (when mated)
Response time	T05 < 5 s; T09 < 10 s (per DIN EN 60751)
Ambient temperature	−20…+80 °C (limited to −20…+40 °C if medium >80 °C)
Electrical connection	M12×1 circular connector (4-pin or 5-pin)
Wiring	3-wire
Communication	IO-Link (option, rev 1.1)
Display	14-segment red LED, 4-digit, 9 mm
Approvals	CE (EMC EN 61326, RoHS); UL; EAC; GOST; CRN
Mounting	Process connection lower mount (nominal); display/case rotatable >300°
Weight	approx. 0.3 kg
Notes	WIKA data sheet TE 67.03 ∙ 04/2026. Pt1000 confirmed via WIKA electrical-temperature brochure / OI (not spelled on TE 67.03 body text).

Documents

FAQ

Q: Switch only, or switch plus analogue? A: Base configuration is PNP or NPN switching (1–2 outputs). Add 4…20 mA or 0…10 V if the PLC needs a continuous temperature signal; IO-Link is optional (rev 1.1).

Q: Can I use the standard −20…+80 °C unit above 80 °C process? A: Not without the optional measuring range (−20…+120 °C or 0…+150 °C with compression fitting). Also note ambient is limited to −20…+40 °C when medium >80 °C.

Q: Is this rated for hazardous areas? A: Published marks are CE, UL, EAC, GOST, CRN — no hazardous-area protection. If the location is classified, say so in the RFQ and we will steer you to an Ex-capable option.

Q: What do I send for a quote? A: Range, set points, probe length, process connection, output mix (PNP/NPN, analogue, IO-Link), supply, ambient, required marks, quantity. Compatible with systems using WIKA TSD-30 if you need a drop-in check — we do not claim authorized-dealer status.