Armfield Engineering Education

Hydraulic Research Instruments

H Series - Issue 3
H1 - Vernier Hook & Point Gauges

(H1-1,H1-2,H1-3)

The measurement of steady state water surface position is frequently needed during hydraulic investigations. This is done by using a small point or hook manually adjusted to touch the water surface, and a reading is taken of the vertical movement using a scale or vernier.

Right: H1-2 (150mm scale)

ORDERING SPECIFICATION

A direct indicating gauge which eliminates observation errors due to vernier and scale reading. It can be set to zero anywhere in the operating range to permit easy relative level checking. The liquid crystal display is easy to read and has a resolution of ±0.01mm. A push button gives immediate change to inches from millimetres if required. A quick-release mechanism permits rapid changes of position.

Capabilities

> Location of air-water surface boundaries with high resolution
> Measurement of slowly changing water levels in flumes and hydraulic models
> Measurement of mechanical deformation

Description

A mounting frame is clamped to a suitable support structure and a gauging rod is free to slide up and down over the water surface. A stainless steel hook or point is attached to the bottom end of the rod and is used to locate the water surface.

Gauging is carried out by means of a primary scale attached to the mounting frame and a vernier scale attached to the rod. The scales are in edge contact.

The rod is held in a screwed collar for fine adjustment and can be released for large, rapid changes of position. Zero can be reset by a locking screw positioned on the vernier scale.

Technical specification

Ranges:

H1-1: 150mm
H1-2: 300mm
H1-3: 450mm

Resolution: ±0.10mm

Typical accuracy: ±0.20mm

Repeatability: ±0.10mm

Accessories

H1-10 Tripod Stand

Overall Dimensions

H1-1 (150mm): Height: 265mm Width: 75mm Depth: 50mm
H1-2 (300mm): Height: 415mm Width: 75mm Depth: 50mm
H1-3 (450mm): Height: 565mm Width: 75mm Depth: 50mm

Shipping specification

H1-1 (150mm): Volume: 0.01m³ Gross Weight: 1.2kg
H1-2 (300mm): Volume: 0.01m³ Gross Weight: 1.5kg
H1-3 (450mm): Volume: 0.01m³ Gross Weight: 1.7kg

Extended 2 year Warranty on all Armfield Products

DATA SHEET

PRODUCT CATEGORY:
Engineering Education