External Sensors for HOBO Data Loggers
Air / Water / Soil Temperature Sensors for HOBO Loggers
The Air, Water and Soil Temperature Sensors can be plugged directly into the external input jacks of the HOBO U12 family of data loggers to expand the range of measurement options and applications.
| Specifications | |
|---|---|
| Range: | -40° to 50°C (-40° to 122°F) in water or soil -40° to 100°C (-40° to 212°F) in air |
| Accuracy with HOBO U12 series loggers (insert probe 0.9 in. min.) : | ±0.25° at 20°C (±0.45° at 68°F) |
| Accuracy with HOBO H8 series loggers (insert probe 0.9 in. min.) : | ±0.5° at 20°C (±0.9° at 68°F) |
| Drift: | < 0.1°C (0.2°F ) per year |
| Resolution with U12 Loggers: | 0.03° at 20°C (0.05°F at 68°F) |
| Resolution with H8 Loggers: | 0.41° at 20°C (0.7°F at 68°F) |
| Response time in air: | 3 minutes typical to 90% in air moving 1 m/sec (2.2 mph) |
| Response time in stirred water: | 1 minute typical to 90% |
| Housing: | Stainless-steel sensor tip |
| Probe dimensions: | 0.5 cm x 2.5 cm (0.20 in. x 1.0 in.) |
| Length: | Available in 0.3m, 1.8m, 6.1m, and 15.2m foot cable lengths (1, 6, 20, and 50 foot) |
| Weight: | 37g (1.3 oz), 125g (4.4 oz), or 280g (9.9 oz) |
| Note: Sensor tip and cable immersion in fresh water up to 50°C (122°F) for one year; radiation shield strongly recommended for use in sunlight. | |
4–20 mA Input Cable
An external input cable with 89mm (3.5") tinned braided wire leads transmitting a range of 0 to 20.1 mA current, this model is for use with loggers with external input channels, but is not designed for use with Intrinsically Safe (IS) loggers. Accuracy and resolution vary with attached logger. Overall length of this cable is 457mm (18").
| Specifications | |
|---|---|
| Range: | 0 to 20.1 mA |
| Accuracy with HOBO U12 series loggers: | ±0.02 mA ±2.5% of reading |
| Accuracy with HOBO H8 series loggers: | ±0.1 mA ±3% of reading |
| Resolution with U12 Loggers: | 0.03% of full scale |
| Resolution with H8 Loggers: | 0.4% of full scale |
| Length: | 457mm (18 in.) cable with 89mm (3.5 in.) tinned braided wire leads |
| Notes: input cable is not designed for use with Intrinsically Safe (IS) loggers | |
Voltage Input Cable
An external input cable with 13mm (0.5") tinned braided wire leads. Voltage input specifications vary with attached logger. Note that only passive sensors should be attached when this cable is used with Intrinsically Safe (IS) loggers. Overall length of this cable is 1.8m (6 feet).
| Specifications | |
|---|---|
| Input Range: | 0 to 2.5 VDC |
| Accuracy with HOBO U12 series loggers: | ±2 mV; ±2.5 % of absolute reading |
| Accuracy with HOBO H8 series loggers: | 10 mV ±3% of reading |
| Resolution with U12 Loggers: | 0.6 mV |
| Resolution with H8 Loggers: | 10 mV (8-bit) |
| Output power: | 2.5 VDC at 2 mA; active only during measurements |
| Length: | 1.8m (6 foot) cable with 13mm (0.5 in.) tinned braided wire leads |
| Notes: Only passive sensors should be used with Intrinsically Safe (IS) loggers | |
CTV Sensors for AC Amperage
- Ranges available (AC Amps): 0-20, 0-50, 0-100, 0-200, 0-600
- Accuracy with H8: ±5.0% of full scale
- Accuracy with U12: ±4.5% of full scale
- Response time (from 10% to 90% of amplitude): see table
- Input current: AC current, sine wave, single phase 50 Hz or 60 Hz, load power factor 0.5 to 1.0 lead or lag
- Voltage rating: 600 VAC
- Construction and operating environment: Molded plastic housing for indoor use per UL508; pivoting leg (leg on CTV-D and CTV-E units is fully removable); UL listed.
- Cable Length: 1.8m cable (6 foot)
- Dimensions: see table
- AC current sensors are not CE approved
- AC current sensors are not designed for use with Intrinsically Safe (IS) loggers
Notes
| Part No. | Range (Amps AC) | Approximate Response Time (milliseconds) | Dimensions | |||
| Window | Outer Length | Outer Width | Height | |||
| CTV-A | 0–20 | 440 | 2.8 cm x 2.3 cm 1.1 in. x 0.9 in. | 7.4 cm 2.9 in | 6.6 cm 2.6 in | 2.5 cm 1.0 in |
| CTV-B | 0–50 | 200 | 2.8 cm x 2.3 cm 1.1 in. x 0.9 in |
7.4 cm 2.9 in | 6.6 cm 2.6 in | 2.5 cm 1.0 in |
| CTV-C | 0–100 | 100 | 2.8 cm x 2.3 cm 1.1 in. x 0.9 in |
7.4 cm 2.9 in | 6.6 cm 2.6 in | 2.5 cm 1.0 in |
| CTV-D | 0–200 | 450 | 3.8 cm x 3.3 cm 1.5 in. x 1.3 in | 9.9 cm 3.9 in | 11.9 cm 4.7 in | 2.8 cm 1.1 in |
| CTV-E | 0–600 | 490 | 7.4 cm x 6.4 cm 2.9 in. x 2.5 in | 13.5 cm 5.3 in | 15.0 cm 5.9 in | 2.8 cm 1.1 in |
| Ordering Information | ||||
|---|---|---|---|---|
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| Description | Part Number | Qty 1-9 | Qty 10+ | |