### device | instrument:

Tensiometer
* Some tensiometers have an attached Bourdon vacuum gauge.
* are devices that measure the soil water tension by acting like a mechanical root
  - useful for monitoring the soil water status while run times are being shortened
  - well adapted to sandier soils
* come in various lengths.
* consist of a tube with a porous ceramic cup at one end and a gauge at the other.
* fail when air bubbles develop in the water column.
* give a direct reading of the soil moisture tension existing in the rootzone.
* indirectly measure soil moisture tension.
* measure the matric potential directly.
* only measure soil moisture in one spot.
* report soil moisture in centibars.

Tonometer
* is an instrument
* measure the intraocular pressure.

### device | instrument:

Transit
* always start at the eastern limb of the planet and end at the west.
* are signposts pointing out the important cycles in life.
* are the positions of the planets in the signs at a given time
  - sun, moon and planets charted for any point in time after birth
* brings people together in stations, towns, and in larger vehicles.
* contribute to personal growth.
* includes eyepieces
  - sections
  - any form of passenger transportation other than walking, cycling and the private car
  - one of the keys to reducing greenhouse gas emissions
* is the passage of an object across an observer's meridian
  - one body across the face of a second body
  - process of moving people
  - total time spent transiting to and from the slick
* key element in moving people into the workforce by providing access to jobs.
* occur when a satellite moves across the face of Jupiter as seen from the Earth.
* only occur between sunrise and sunset around the times of semiannual equinoxes.

### device | instrument | transit:

Planetary transit
* have durations of a few hours to less than a day.
* signal the best time WHEN to effectively change directions.

Rail transit
* benefits low-income people.
* helps all walk of life to get around and aviod traffic.
* is rapid transit
  - sum of commuter rail, heavy rail, and light rail
* way to bypass the congestion.

Various instrument
* are used to measure length.
* use holes in the vibrating air column to shorten and lengthen the air column.

Vehicle instrument
* are used to show things about a car.
+ Instrument
  * Vehicle instrument are used to show things about a car. For example, speedometer or fuel gauge.

### device | instrument:

Watch
* Some watches use special silicones as sealant.
* are clocks
  - different than clocks in that they are carried about or worn
  - gear
  - important for work and play
* are located in department stores
  - jewellers
  - machines
  - shifts
  - solids
  - something that, by their nature, people are accustomed to wearing
  - surveillance
  - time periods
  - used for time
* have hands.
* keep track of time by various means, including battery and hand winding.
+ Wristwatch: Clocks
  * Watches display the time and sometimes the day, date, month and year. In 1524, Peter Henlein created the first pocket watch. Before the 1900s, most watches were pocket watches which were carried in a pocket and attached to a chain.

### device | instrument | watch:

Astronomical watch
* are made by several manufacturers.
+ Astronomical clock: Clocks :: Astronomy
  * An 'astronomical clock' is a clock with special mechanisms and dials to display astronomical information. It displays the relative positions of the sun, moon, zodiacal constellations, and sometimes major planets. Some examples are large public clocks, but others are instruments for use inside buildings. Astronomical watches are made by several manufacturers.

Mechanical watch
* Most mechanical watches use a least five different lubricants for various parts of the mechanism.
* use a coiled mainspring for power.