Mensor CTB9100-165 Micro Calibration Bath

Portable micro calibration bath for short temperature probes — −30…+165 °C (−22…+329 °F), accuracy ±0.20 K, temperature stability ±0.05 K, usable tank Ø 60 × 150 mm insertion depth (~0.6 L), continuously adjustable stirrer, dual-line LED set/actual display, RS-485 Modbus RTU, AC 100…240 V.

Key advantages

Short-probe friendly — preferred vs dry-well when stem length drops below ~70 mm (OEM guidance).
−30…+165 °C — accuracy ±0.20 K; stability ±0.05 K over 30 min at stable temperature.
Large micro-bath tank — Ø 60 mm with 150 mm insertion depth; calibrate multiple mixed-diameter probes together.
Fast portable use — heating ~45 min (20→160 °C); cooling ~30 min (20→−20 °C); adjustable stirrer.
Communications — RS-485 to USB; Modbus RTU; 100…240 V AC, 50/60 Hz, 375 VA.

Typical applications

On-site calibration in pharmaceutical and food plants.
Calibration of short temperature probes.
Simultaneous multi-probe calibrations with mixed stem diameters.
Complement to CTD9100 / CTD9300 dry-well calibrators.

Selection guide

Model — CTB9100-165 (−30…+165 °C) vs CTB9100-225 (40…255 °C family) — this SKU is -165.
Bath medium — select fluid compatible with the temperature span (water / silicone oil per application).
Power cord region — Europe / USA-Canada / Switzerland / UK options per datasheet.
Certificate — standard 3.1 per DIN EN 10204; optional DKD/DAkkS.
Accessories — carrying handle height 50 mm; confirm inserts/covers for your probe set.

Common mistakes

Ordering CTB9100-225 when the duty needs sub-ambient (−30 °C) — that is the -165 model.
Using a dry-well for stems shorter than ~70 mm when a micro bath would cut heat-dissipation error.
Wrong bath fluid for the temperature extremes.
Outdoor use — OEM states indoor use only.

When to RFQ / what to tell us

Confirm CTB9100-165 (not -225); power-cord region.
Bath medium preference; certificate type (3.1 / accredited).
Probe diameters / count for cover selection.
Quantity and ship-to country.

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Specs

Spec	Value
SKU	44306
Brand	Mensor (WIKA)
Model	CTB9100-165
Product type	Portable micro calibration bath
Temperature range	−30…+165 °C (−22…+329 °F)
Accuracy	±0.20 K
Temperature stability	±0.05 K (max difference over 30 min at stable temperature)
Tank / insertion depth	Ø 60 × 165 mm tank; insertion depth 150 mm; volume ≈0.6 L
Display	2-line, 4-digit LED; resolution 0.01 to 100 °C, 0.1 above
Supply voltage	AC 100…240 V, 50/60 Hz; 375 VA
Interface	RS-485 (USB); Modbus RTU
Dimensions / weight	215 × 305 × 425 mm (without handle); approx. 12.5 kg
Notes	Specs from wika.com CTB9100 page and data sheet CT 46.30 (dsct4630en_co.pdf). Confirm medium and cord before order.

Documents

FAQ

Q: CTB9100-165 vs -225? A: -165 covers −30…+165 °C; the -225 family covers high-temperature baths starting at 40 °C. This SKU is -165.

Q: When prefer a bath over a dry-well? A: OEM recommends a micro bath when stem length is below about 70 mm, or when many mixed diameters must be calibrated together.

Q: What should I send for a quote? A: Confirm -165, cord region, medium, certificate, probe set, quantity, ship-to. Compatible with systems using Mensor/WIKA CTB9100-165 if you need a drop-in check — we do not claim authorized-dealer status.