Product Overview
Gastec GV-100S Pump Set: The Hand Pump Behind the Detector Tube
Condition
Used, in like-new condition: clean, fully functional, with minimal to no signs of prior use. The one honest exception is the paperwork: on our own inspection the operation manual cover carries creasing, slight scuffs and faint handwriting, so the book has been handled more than the instrument. In the frames the pump shows its molded GASTEC barrel, the TIP BREAKER collar with the bright metal breaker at the nose, the volume ring marked 50/100ml with its red index line, and the braided wrist lanyard still anchored at the handle end. The gray ribbed-texture case carries the original oval patch reading PUMP SET GV-100S, GASTEC, MADE IN JAPAN, zips shut, has a clear NAME card window sewn on the outside of the case body and a two-snap flap on the back. The camera confirms three things in this set: the pump, the Gastec GV-100 operation manual, and the case.
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Product Overview
The Gastec GV-100S is the pump set built around the GV-100 manual gas sampling pump, the hand piston pump that pulls a measured air sample through Gastec colorimetric detector tubes so a technician can read a concentration off the stain length instead of a screen. The naming is worth knowing before you buy: the case patch reads PUMP SET GV-100S while the enclosed book is titled Operation Manual, Gastec Model GV-100 Gas Sampling Pump for Gastec Detector Tube Systems, so the S belongs to the kit and GV-100 to the pump inside it. A half stroke of the T-handle draws 50 mL and a full stroke draws 100 mL, with the barrel ring marked 50/100ml and a red index line so the operator can see which volume is set. The bright metal tip breaker under the molded TIP BREAKER collar snaps the sealed ends off a fresh tube before it is seated at the nose. The barrel is a textured black grip with the GASTEC logo molded in and a braided wrist lanyard at the handle end, and the whole set travels in its own zip case. Detector tubes are not included, and this is calibration-sensitive sampling equipment: tube compatibility beyond standard Gastec detector tubes, flow accuracy, and any calibration or service history are not confirmed - verify against the Gastec datasheet and run the leak check described in the operation manual before use.
Key Features
- Manual piston hand pump for Gastec detector tube systems, per the enclosed GV-100 operation manual
- 50 mL half stroke and 100 mL full stroke, marked 50/100ml on the barrel ring with a red index line
- Bright metal tip breaker under the molded TIP BREAKER collar for opening sealed detector tubes
- Textured black barrel with molded GASTEC logo and a braided wrist lanyard at the handle
- Gray ribbed-texture zip case with the original PUMP SET GV-100S patch, clear NAME card window on the case exterior and two-snap back flap
- Made in Japan, per the case patch
- Includes the Gastec GV-100 operation manual shown in the photos
Applications
- An industrial hygienist walking a plant with a handful of Gastec tubes, taking spot readings area by area and carrying the pump in its own case
- A confined space entry team pulling a 100 mL sample at the manway before anyone signs the permit
- An environmental or IAQ consultant checking a vapor complaint where a battery instrument is more gear than the call needs
- A safety trainer who wants a real working hand pump for detector tube demonstrations instead of a photo on a slide
Frequently Asked Questions
Are detector tubes included?
No. Detector tubes are consumables chosen for the specific gas you are measuring, and none appear in the photos. What you see here is the pump, the GV-100 operation manual, and the case. Buy the tube type your job calls for separately.
Is this a GV-100S or a GV-100?
Both, in the way Gastec labels it. The case patch reads PUMP SET GV-100S and the manual inside is written for the Gastec Model GV-100 Gas Sampling Pump, so GV-100S is the set designation and GV-100 is the pump itself. If your paperwork or your tube documentation calls for either number, this is the piece it is pointing at.
How do I check the pump before I trust a reading?
The operation manual walks through the leak test: seat an unopened tube, pull a full stroke, and confirm the piston holds rather than creeping back. Do that on arrival and before any sample that matters. We ship the manual with the pump so the procedure travels with it.
What am I taking on with a used sampling pump?
Straight answer: you are buying this exact photographed set, sold used, and the photos are the spec for what arrives. We rate it clean and fully functional with minimal to no signs of prior use, we call out the creased and lightly scuffed manual cover with its faint handwriting, and we say plainly what we have not done - there is no calibration certificate, no documented flow record, and no detector tubes in the box. Run the manual's leak check, match your tubes, and you have a known instrument instead of a mystery from an auction lot. This one clears our free shipping line on its own, and orders leave the Idaho warehouse the same or next business day.
Colorimetric detection is chemistry you can read with your own eyes: snap the tube, pull the handle, watch the stain climb the scale. This small Japanese piston pump is the muscle behind that reading, and it is waiting on your next tube.
