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Digital stopwatch TM-136 for precise time measurements in the field. For the first 30 minutes, this stopwatch has a precision of 1/100 of a second. The casing is extra strong, so the stopwatch can withstand a knock.

Biodegradable measuring wire for the Haglöf Walktax.

Sharpening kit for the increment borers.

Replacement Battery for Mat/TCM data loggers and tilt current meters.

The Battery Replacement Tool Kit for TCM-1, TCM-3 & MAT-1 is recommended to purchase alongside these meters or logger.

Battery Replacement Tool Kit for TCM-4 is recommended to purchase alongside the TCM-4 Shallow Water Tilt Current Meter.

Battery Replacement Tool Kit for the TCM-5 Very Deep Water Tilt Current Meter is recommended to purchase alongside these meters or logger.

Replacement O-rings (10 Pack) for MAT-1 PVC, TCM-1 & TCM-4. Includes O-ring lubricant.

Replacement O-rings (10 Pack) for MAT-1 Titanium & TCM-3. Includes O-ring lubricant.

Replacement O-rings (10 Pack) for TCM-5. Includes O-ring lubricant.

Spare PVC or Titanium end cap for the MAT-1 Data Logger. Includes pre-lubricated O-ring.

TCM-1 Inversion Kit for the TCM-1 Current Meter. Required to use the meter in an "inverted" or hanging orientation.

Spare PVC end cap for the TCM-1 Current Meter. Includes pre-lubricated O-ring and 30 cm lanyard.

Spare Titanium end cap for the TCM-3 Deep Water Tilt Current Meter. Includes one pre-lubricated O-ring.

Spare PVC end cap for the TCM-4 Shallow Water Tilt Current Meter. Includes pre-lubricated O-ring.

Spare Titanium end cap for the TCM-5 Very Deep Water Tilt Current Meter. Includes one pre-lubricated O-ring.

Desiccants for TCM & MAT Loggers, 20 pieces of dessicant indicating silica gel.

OXEL-03 Electrolyte Refill for the PDO-519 Dissolved Oxygen Meter

Offload data from any HOBO® data logger with this HOBO Optic USB Base Station

The HOBO Waterproof Shuttle U-DTW-1 operates in indoor, outdoor and water environments.

A protective enclosure for Onset's HOBO MX801 data logger.

A protective plug to seal unused sensor inputs on MX800 data loggers.

Can be used in place of the standard protective guard for protection against fouling during deployment.

Replaces the original DO sensor cap of the HOBO MX800 Series DO sensor (W-DO).