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VERTEX Bottle Top Dispenser is another genius of its strong R&D base. Responding to the needs of the present generation, RV Instruments is proud to offer its NEW BOTTLE TOP DISPENSERS in two indigenous versions. Premium which is an unique combination of affordable pricing and high performance.

Premium Model : All wetted parts are PTFE, FEP and Borosilicate Glass (3.3) only. This can be used for all laboratory reagents except HF.

Simple design clubbed with variety of useful features makes VERTEX Bottle Top Dispensers an obvious choice for all dispensing needs. High precision and accuracy is ensured through careful selection of component raw material and several stages of strict quality checks during manufacturing process Each instrument is individually calibrated in accordance with ISO 8655 standards and comes with individual Calibration certificate.


Description Premium Models
Piston PTFE
Cylinder Borosilicate Glass (3.3)
Volume adjustment Knob Screw Types
Valve assembly Glass ball & seat
Valve Housing PTFE
Discharge assembly PTFE
Delivery tube FEP
Inlet tube FEP
Calibration Individually Calibrated and certified in lab easy calibration by user is also possible.
Accuracy & Reproducibility In accordance with a ISO 8655 standards
Compatibility Excellent Compatibility with all reagent except HF


Model No. ISO 8655 Specifications RV Instruments Specifications
Primium Model Vol. Range Increment Accuracy CV Accuracy CV
BTDP-1 0.25-2.5 ml 0.05 ml 0.6 0.015 0.2 0.005 0.6 0.015 0.2 0.005
BTDP-2 0.5-5 ml 0.1 ml 0.6 0.030 0.2 0.010 0.5 0.025 0.1 0.005
BTDP-3 1-10 ml 0.2 ml 0.6 0.060 0.2 0.020 0.5 0.050 0.1 0.010
BTDP-4 2.5-25 ml 0.5 ml 0.6 0.150 0.2 0.050 0.5 0.125 0.1 0.025
BTDP-5 5-50 ml 1.0 ml 0.6 0.300 0.2 0.100 0.5 0.250 0.1 0.050
BTDP-6 10-100 ml 2ml 0.6 0.600 0.2 0.120 0.5 0.500 0.1 0.100

Premium Model Available in 6 adjustable vol sizes :

(a) 0.25-2.5 ml (b) 0.5-5.0 ml (c) 1.0-10ml (d) 2.5-25.0 ml (e) 5.0-50.0ml (f) 10-100ml

  • Adaptors : 28mm, 32mm, 38mm, 42mm, and 45mm.
  • Easy to use, simple construction and smooth, effortless plunger movement for bubble free dispensing.
  • Piston : Specially designed PTFE Piston with Silicone O-ring ensures smooth, effortless piston movement and high accuracy.
  • Each instrument comes with five adaptors to fit in most of the laboratory reagent bottles.
    Standard threads : 30mm
    Adaptors : 28mm, 32mm, 36mm, 40mm, and 45mm.
  • Nozzle cap prevents any unwanted drop on the work space.
  • Easy to dis-assemble for cleaning and servicing.
  • Glass Barrel is protected by a polypropylene sleeve. It Glass Barrel is protected by a polypropylene sleeve. It also ensures no glass splitting in case of any accidental breakage.
  • Valve Manifold : Specially designed, single piece PTFE valve manifold in the Premium Model ensures excellent chemical compatibility, leak proof valve functioning and excellent reproducibility.
  • Instrument is fully autoclavable at 121 C, 15psi. No Need for disassembling the instrument for autoclaving.
  • Screw type volume adjustment knob with large pointer ensures precise, easy and quick volume adjustment.
  • Calibration : Specially designed universal calibration tool is provided for convenient and quick In-lab user re-calibration. This is in compliance with GLO/ISO Norms.