Quick answer: a PVS-14 is one night vision tube in front of one eye; a PVS-31 is two tubes, one per eye, so both eyes see in the dark and you get real depth perception. Our PVS-14 starts at $1,784.95 and our PVS-31 PRO starts at $3,799.95, both Gen 2+ white phosphor. Buy the PVS-14 if it is your first unit or you want one device for helmet and hand. Buy the PVS-31 PRO if you walk, drive or work with your hands at night for hours at a time.
"PVS-14 vs PVS-31" is really two questions at once. The first is one tube or two. The second is which PVS-31 you mean, because the name covers both the L3Harris AN/PVS-31A sold through dealers and civilian dual tube goggles built in the same layout, like ours. This post answers both, with our own prices read from our product pages on 23 October 2026 and a dated, named source for every outside figure.
What is the difference between a PVS-14 and a PVS-31?
A PVS-14 is a monocular: one image intensifier tube in one housing, worn in front of one eye on a helmet mount, or held in the hand. Your other eye stays on the natural night, so you can still read a map light or see a lit room without flipping the unit up.
A PVS-31 is a binocular: two tubes in two pods on one bridge, one in front of each eye. Both eyes see the amplified picture, and because each eye gets its own tube, your brain builds depth from the two views the way it does in daylight. That is the whole reason dual tubes exist: judging distance to a step, a branch or a fence post is far easier with two amplified eyes than with one.
How do the PVS-14 and PVS-31 compare side by side?
| Spec | Our PVS-14 |
Our PVS-31 PRO |
L3Harris AN/PVS-31A |
|---|---|---|---|
| Price | from $1,784.95 | from $3,799.95 | from $13,999 (TNVC listing) |
| Tubes | 1 x Gen 2+, white phosphor, autogated | 2 x Gen 2+, white phosphor, autogated | 2 x Gen 3, white phosphor |
| Field of view | 40 degrees (STANDARD housing) or 50 degrees (PRO housing) | 50 degrees per tube | 40 degrees |
| Gain | Manual gain | Manual gain | See seller |
| Power | 1 x AA, about 40 hours | Helmet battery pack for 4 x AA, in the box | See seller |
| Weight | 265 g or less, battery not included | Heavier, two pods plus a rear battery pack | See seller |
| In the box | G24 helmet mount and J-arm | G24 helmet mount and battery pack | Mount and battery pack typically sold separately |
| Tube sheet | Printed QC sheet for your tube | Printed QC sheet for each tube | See seller |
Source for the AN/PVS-31A row: the TNVC listing "L3Harris BNVD (AN/PVS-31A) 2376+ FOM", $13,999 to $15,337.33 by option, read 23 October 2026. Our specs come from our own product pages, and our prices were read from the live listings the same day. Prices and stock change, so check the seller's own page before you buy anything.
Which should you buy first, a PVS-14 or a PVS-31?
For most first time buyers, the PVS-14. It does more jobs: it goes on a helmet, it hand holds like a pocket scope, it can be passed to someone else, and it keeps one natural eye free. It also costs less than half of a dual tube, so the money left over can go to a good helmet setup or a second goggle later.
Buy the PVS-31 PRO first if you already know your nights are long and on the move. Two amplified eyes make walking rough ground, driving a trail or working with your hands far less tiring, because your brain is not fusing one bright eye with one dark eye for hours. If that describes your use, buying a monocular first and then a binocular later costs more in total than buying the binocular once.
- First night vision, mixed use, or a spend under two thousand dollars: PVS-14.
- Hours of movement on foot or in a vehicle, every week: PVS-31 PRO.
- You already own a PVS-14 and keep wishing for depth: PVS-31 PRO, and keep the PVS-14 as the handheld or the second person's goggle.
What does depth perception change at night?
With one tube, the picture is flat. You learn to judge distance from size and movement, and most owners get good at it, but steps, curbs and low branches still catch people out. With two tubes, each eye sees the scene from a slightly different spot, and the gap between the two pictures is what your brain reads as depth.
That matters most when you move. Standing still on a deck watching a field, a monocular gives up almost nothing. Walking a fence line, crossing a creek bed or driving a farm track, two eyes on the tubes is the difference between careful and comfortable. Our post on monocular or binocular first goes deeper on how this feels over a long night.
How does field of view compare?
Field of view is how wide a circle you see through each tube. Our PVS-14 comes in two housings with the same tube inside: STANDARD shows 40 degrees, the classic PVS-14 view, and PRO shows 50 degrees, for $35 more. Our PVS-31 PRO gives 50 degrees per tube.
The L3Harris AN/PVS-31A is listed at 40 degrees per tube. So on width of view alone, our PVS-31 PRO shows more of the scene per eye. On tube performance on the darkest nights, the Gen 3 tubes in the AN/PVS-31A are the stronger tubes. That is the honest trade, and the next section is about it.
Is our PVS-31 PRO the same as the military AN/PVS-31A?
No, and we say so plainly. The AN/PVS-31A is L3Harris's Gen 3 dual tube binocular. Ours is our own dual tube in the same layout, with two Gen 2+ white phosphor tubes, autogated, with manual gain. Gen 3 tubes cost more to make and are stronger in the darkest conditions, which is a large part of why the AN/PVS-31A lists from $13,999 at TNVC (read 23 October 2026) while ours starts at $3,799.95.
What you get for the difference is a goggle you can buy direct, a wider 50 degree view per tube, and the battery pack and mount in the box. What you give up is the extra margin a Gen 3 tube has under heavy overcast with no moon. If you want the full breakdown, read PVS-31 PRO vs AN/PVS-31.
What comes in the box?
From our product pages:
- PVS-14: the monocular, a G24 helmet mount and a J-arm, and a printed QC sheet with your tube's own measured numbers.
- PVS-31 PRO: the binocular, a G24 helmet mount, a helmet battery pack for four AA batteries, and a printed QC sheet for each tube.
Both carry our warranty: 3 months, up to 12 months with Operator Care. Returns and the exact terms are on our warranty and refund pages.
Which tube grade should you pick?
Both goggles are sold in FOM tiers. FOM is a single number for how clean and sharp a tube's picture is; higher is better. The PVS-14 starts at the 1250 to 1350 tier and the PVS-31 PRO starts at the 1400 to 1550 tier. Under a moon or near town glow, the entry tiers do the job well. Under dark, moonless skies, a higher tier earns its price. Our guide to what FOM means explains the numbers in plain terms.
Can you bridge two PVS-14s instead?
Yes, two PVS-14s on a bridge mount give you two tubes and real depth, and they split back into two monoculars for two people. The trade is weight, tubes that were not matched as a pair, and a bridge to buy. Our post on bridging two PVS-14s compares that route against a PVS-31 PRO.
Our pick: start with the PVS-14, from $1,784.95 if this is your first night vision or you want one unit for helmet and hand. Go straight to the PVS-31 PRO, from $3,799.95 if your nights are long and on the move: two Gen 2+ white phosphor tubes, 50 degrees per tube, mount and battery pack in the box.
Common questions about the PVS-14 and PVS-31
What is the difference between a PVS-14 and a PVS-31?
A PVS-14 is a single tube monocular for one eye. A PVS-31 is a dual tube binocular, one tube per eye, so both eyes see in the dark and you get depth perception. Our PVS-14 starts at $1,784.95 and our PVS-31 PRO at $3,799.95.
Is a PVS-31 worth it over a PVS-14?
If you walk, drive or use your hands at night for hours at a time, yes: depth perception and two amplified eyes make it far less tiring. If you want one unit for helmet and hand at the lowest price, the PVS-14 does more jobs.
How much is a PVS-31?
The L3Harris AN/PVS-31A listed from $13,999 at TNVC when we read it on 23 October 2026. Our Gen 2+ PVS-31 PRO starts at $3,799.95 with a G24 helmet mount and a battery pack in the box.
Is the Night Operators PVS-31 PRO Gen 3?
No. It uses two Gen 2+ white phosphor tubes, autogated, with manual gain. Every unit ships with a printed QC sheet for each tube showing its measured numbers.
Which has the wider field of view?
Our PVS-31 PRO shows 50 degrees per tube. Our PVS-14 shows 40 degrees in the STANDARD housing and 50 degrees in the PRO housing. The L3Harris AN/PVS-31A is listed at 40 degrees.
Can I add a second tube later?
You can buy a second PVS-14 and bridge the two for depth, or keep the PVS-14 as a handheld and add a PVS-31 PRO. Many owners end up with both: the binocular on the helmet and the monocular in the hand.
One tube or two, sold direct, with the measured numbers for every tube on paper. Every Night Operators PVS-14 ships with a G24 helmet mount and J-arm, and every PVS-31 PRO with a G24 helmet mount and a battery pack. PVS-14, from $1,784.95.