Verniers Microscopes - PTI

2150 - Vernier Microscope
Vernier Microscope No. 2150 is the simplest and least expensive of our range. It is intended to meet the demand for an instrument with a reasonable degree of accuracy which is, at the same time, capable of withstanding the harsh treatment to which instruments are subjected when first introduced into school practical work. The microscope can be swivelled such that it can either view parallel or perpendicular to the motion. In this instrument coarse adjustment of the carriage is effected by manual pressure, as the carriage is held to the fine adjustment thrust-rod by spring tension. Fine adjustment is amde by means of a fine thread screw. the instrument is also suitable for use on end, or on the front face.

Technical Specification
Vernier Microscope No. 2150 has a travel of 100 mm with vernier reading to 0.1 mm.
The microscope is supplied complete with 30 mm objective, 10% Ramsden eyepiece, and glass crossline graticule. Focusing is by friction rack and pinion.
The complete instrument is packed in a polished case and weighs approximately 5.5kg.

Price: £693.00

2152 - Vernier Microscope
These vernier microscopes are more refined versions of the No. 2150 model, and together with microscope No. 2158 are the standard instruments used in schools and colleges. In addition to operating to a greater accuracy, they incorporate features enabling them to be used for a greater range of experiments.

The carriage slides on a cast-iron base and is guided by means of a vee and flat machined in the base. The carriage has a locking screw, release of which permits free manual movement of the carriage. Fine adjustment is by meansof the fine thread screw at the end of the slide. The saddle carries the vernier, which is read by means of a swivelling magnifier. The microscope can be mounted with its axis in any one of the three directions with respect to the travel. The base carries a metal stage plate and this can be removed to enable the microscope to view through the base when using the instrument as a short range cathetometer.

Technical Specification
The instruments, which are supplied in polished cases, are identical except for travel and weight, and are supplied complete with 50 mm objective, 7x ramsden eyepiece, and glass crossline graticule, giving an overall magnification of approximately 20x. The microscope is focused by friction rack and pinion, and it is fitted with a draw tube.
Vernier Microscope No. 2152 has a travel of 165 mm with vernier reading to 0.01 mm and weighs approximately 10 kg.
Vernier Microscope No. 2155 has a travel of 300 mm with vernier reading to 0.01 mm and weighs approximately 14 kg.

Price: £1100.00

2158 - Vernier Microscope
This instrument has calibrated movements in one horizontal direction and also vertically. the cast-iron base has three levelling screws, and is machined to take a kinematically mounted horizontal carriage which supports the vertical column. This carriage has a small circular level, and also carries a magnifier for reading the horizontal scale. The verical column, which has graduations cut directly into it, carries the vertical carriage on which is mounted the microscope. This microscope can be fitted to either side of the vertical column to suit the user's prefernce, and can be set to be horizontal or vertical. Both carriages have locking screws, releasing which enables free manual movement of the carriages, and fine adjustment is by means of the fine thread screw at the end of each slide. The base is fitted with a metal stage plate.

Price: £1408.00