Ideal for long-term, unattended applications
Overview
The HMP60, manufactured by Vaisala, probe measures temperature for the range of -40° to 60°C, and relative humidity for the range of 0 to 100% RH. It is suitable for long-term, unattended monitoring, and is compatible with all Campbell Scientific dataloggers.
Read MoreBenefits and Features
- Field-replaceable humidity chip eliminates recalibration downtime
- Compatible with most Campbell Scientific dataloggers
- Can be mounted to a tower/tripod mast or crossarm
Technical Description
The HMP60 uses the INTERCAP capacitive RH chip. This chip is field-replaceable, which eliminates the downtime typically required for the recalibration process.
Images
Compatibility
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
Dataloggers
| Product | Compatible | Note |
|---|---|---|
| CR1000 (retired) | ||
| CR1000X (retired) | ||
| CR300 (retired) | ||
| CR3000 | ||
| CR310 | ||
| CR350 | ||
| CR6 | ||
| CR800 (retired) | ||
| CR850 (retired) |
Additional Compatibility Information
Mounting
When exposed to sunlight, the HMP60 must be housed in a 41303-5A, 41303-5B, or RAD06 6-plate naturally aspirated radiation shield. The 41303-5A and RAD06 attaches to a crossarm, mast, or user-supplied pipe with a 2.5 to 5.3 cm (1.0 to 2.1 in.) outer diameter. The 41303-5B attaches to a CM500-series pole or a user-supplied pole with a 5.1 cm (2.4 in.) outer diameter.
The RAD06 uses a double-louvered design that offers improved sensor protection from driving rain, snow, and insect intrusion, It also has lower self-heating in bright sunlight combined with higher temperatures (> 24°C [~75°F]) and low wind speeds (< 2 m s-1 [~4.5 mph]), giving a better measurement.
Specifications
| Supply Voltage | 5 to 28 Vdc (typically powered by datalogger’s 12 V supply) |
| Current Consumption |
|
| Filter Description | 0.2 µm Teflon membrane |
| Settling Time | 1 s |
| Housing Classification | IP65 |
| Housing Material | AISI 316 stainless steel |
| Filter Cap Material | Chrome-coated ABS plastic |
| Field-Replaceable Chip or Recalibrate | Field-replaceable chip (RH only) |
| Sensor Diameter | 1.2 cm (0.5 in.) |
| Filter Diameter | 1.2 cm (0.5 in.) |
| Length | 7.1 cm (2.8 in.) |
| Weight | 0.05 kg (0.1 lb) with 1.83 m (6 ft) cable |
Relative Humidity |
|
| Sensing Element | Vaisala’s INTERCAP capacitive chip |
| Measurement Range | 0 to 100% RH (non-condensing) |
| Typical Accuracy at -40° to 0°C |
|
| Typical Accuracy at 0° to 40°C |
|
| Typical Accuracy at 40° to 60°C |
|
| Output Signal Range | 0 to 1 Vdc |
Air Temperature |
|
| Sensing Element | 1000 ohm Platinum Resistance Thermometer (PRT) |
| Measurement Range | -40° to +60°C |
| Accuracy | ±0.6°C |
| Output Signal Range | 0 to 1 Vdc |
Resources and Links
Product Brochures
FAQs for
Number of FAQs related to HMP60: 19
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The most significant difference between backscatter and side-scatter measurements is the sample volume. A backscatter sensor has a much larger sample volume that helps measure higher turbidity values. The smaller sample volume of side-scatter sensors works better at lower turbidities.
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What are the differences between the different turbidity units used, such as NTU, FBU, FTU, and FNU?
It used to be that NTUs were the unit for all turbidity sensors. In 2007, an ASTM committee formed and established different units for each category of turbidity sensor technology, and there are many. Backscatter sensors such as the OBS-3+ and the OBS501 have units of FBU (Formazin Backscatter Units), whereas ISO 7027 side-scatter sensors have units of FNU (Formazin Nephelometric Units). The side-scatter OBS501 and the ClariVue™ sensors are part of this category. While sensors of different technical designs can be calibrated and measure Formazin the same, they will not make the same measurement in natural waters where size, shape, color, reflectivity, etc., of the particles vary. The ClariVue™ sensor measurements will not match the OBS-3+ measurements in natural waters.
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The following are some suggestions:
- Keep the optics clean.
- Site-specific field calibration may be necessary for the best performance.
- Prevent the sensor from freezing.
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Sensors are calibrated at the factory for measurements up to 4,000 NTUs, if requested at the time of order. Sensor ranges cannot be adjusted outside the factory.
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The OBS-3+ or OBS300 provides two separate outputs to match the two turbidity ranges selected at the time of purchase. Use the curve that matches the turbidity range likely to be experienced during monitoring. Program the data logger to record and store data from each output, or choose which output to use automatically depending on the turbidity.
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The accuracy is 0.5 NTU or 2% of reading.
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Campbell Scientific does not offer a display that can be attached directly to the sensor; however, the data logger used to capture and record the data may have a display.
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Generally, no, as this presents some hazards. For example, this sensor’s field of view in very clear water may extend 20 in., so a pipe less than 20 in. in diameter may distort the readings. Except for very turbid water, Campbell Scientific does not recommend placing this sensor in a pipe.
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This has not been tested; however, it is likely that, as the sensor moves through the water, disturbances or bubbles are created that could distort the turbidity measurements.
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The beam divergence angle of the sensor is 42°. (Within this 42° cone, 95% of the beam power is contained.)
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