- internal temperature sensor type: NTC thermistor 10.000 ohms @ 25°C
- temperature measurement range: -40°C to +85°C
- temperature measurement accuracy:
- 0°C to +70°C:+/- 0.2°C
- @ +25°C: 0.4°C
- -25°C to +70°C: better than 1°C
- -40°C to -25°C: better than 2.0°C
- resolution: 8-bit
- operating pressure: up to 137 Bar, corresponding to 1400 meters of water
- battery lifetime: 10 years under normal use (factory replaceable)
- storage/memory size: 32kB up to 32.640 readings without compression, with compression 244.800 readings
- reusable when memory full: yes
- sample rate: 8 second to 34 minutes
- start logging delay: you can specify a time & date to start logging
- recording modes: ring buffer or stop when full
- pc connection: with USB interface cable
- dimensions: 18mm x 127mm
- weight:
- anodized aluminium: 51g
- stainless steel: 112g
- material seals: EPDM (standard) or Viton (optional)
- protection class: water proof
- mounting: mounting hole on cap
- conformity:
- EN61326: 1977 + A1: 1998 (European emissions and immunity covering ESD, RFI, EFT /B, surge, conducted immunity, voltage dips and interruptions)
- Meets FCC standard 47 CFR part 15, subpart B: 1999, Class B, (US radiated and conducted emissions)
- optional
- factory calibration verification and NIST certificates are available on request
- Viton (part number 21-0071) instead of EPDM (part number 21-0070) O ring
- TrendReader software and USB interface cable
– Nautilus 85 brochure
– Nautilus 85 & 135 manual
– TrendReader software
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O-ring seal compatibility

- o-ring size: AS568A 111
- inspect o-ring regularly and replace every 3 months or earlier if wear and tear is visible. Spare o- rings can be separately ordered, see ordering code below.
- the o-ring should be moistened with silicon grease to maintain the waterproof seal
Ordering code
- Nautilus aluminium housing datalogger NTL-100 part number 01-0261
- Nautilus stainless steel housing datalogger NLT-101 part number 01-262
- Viton o-ring seal part number 21-0071
- EPDM o-ring seal part number 21-0070 (standard)