Quick answer. The deciding question here is whether an item will teach a measurement or be relied on for one. SLE3-0001 to SLE3-0111 (P to W) holds the school range's pH meters, weights and vernier calipers, and the answer changes what you ask for. Slotted weights that load a hanger need denominations; a weight box (SLE3-0107) that will check a balance needs a stated tolerance class. A pH meter (SLE3-0005 portable, SLE3-0006 bench) needs its resolution, calibration buffers and a spare electrode. A vernier caliper needs its least count (IME type, SLE3-0102) or its resolution and battery type (digital, SLE3-0103).
This is the third and largest of Ray Export's alphabetical school laboratory listings, covering codes SLE3-0001 to SLE3-0111 across twelve pages, from P to W. It holds pH meters and photo cells, rheostats and the ripple tank, scalpel sets, rubber corks and tubing, vernier calipers, weight boxes and slotted weights, the Wheatstone bridge, and wave and optics demonstration apparatus.
| Group | Codes seen | Items as listed |
|---|---|---|
| Measurement instruments | SLE3-0005, SLE3-0006, SLE3-0102, SLE3-0103 | Portable pH meter, bench type pH meter scale, IME type vernier caliper, digital vernier caliper |
| Weights and balance accessories | SLE3-0107 to SLE3-0109 | Weight box, slotted brass weights, slotted iron chrome plated weights |
| Electricity and electronics | SLE3-0001, SLE3-0007, SLE3-0052, SLE3-0104, SLE3-0110 | Pencil jockey, photo cell, continuous constantine type rheostats, voltaic cell, Wheatstone bridge with pencil jockey |
| Waves and optics | SLE3-0003, SLE3-0008, SLE3-0053, SLE3-0106 | Periscope, pin hole camera, ripple tank, wave motion machine |
| Mechanics | SLE3-0002, SLE3-0111 | Pendulum bobs, wheel and axle |
| Dissection and cutting | SLE3-0058 to SLE3-0060 | Scalpel blades, scalpel handles, scalpel knife |
| Corks, tubing and bench sundries | SLE3-0009 to SLE3-0011, SLE3-0054 to SLE3-0057, SLE3-0061 | Pipe clay triangle, pipette filler bulb, three way pipette filler, rubber corks plain and with one or two holes, rubber tubing, siphon pump |
| Water treatment | SLE3-0105 | Water distiller |
Ray Export's school laboratory range is catalogued alphabetically and split across three listings. Nothing in the navigation says where one stops and the next begins, so this is the map:
| Listing | Codes | Pages | Alphabetical span |
|---|---|---|---|
| School Laboratory Equipments 1 | SLE1-0001 to SLE1-0090 | 9 | D to H, from Daniel Cell to Hygrometer |
| School Laboratory Equipments 2 | SLE2-0001 to SLE2-0066 | 7 | I to O, from Incubator Electrical to Oven Electrical |
| This listing | SLE3-0001 to SLE3-0111 | 12 | P to W, from Pencil Jockey to Wheel and Axle |
There is no A to C section in the SLE series. Items whose names begin with those letters, such as ammeters, balances and burners, are catalogued in other ranges on this site rather than here, so search by item rather than by letter if you cannot find something.
| Decision | What to confirm |
|---|---|
| pH meter: portable or bench | SLE3-0005 is the portable meter and SLE3-0006 the bench pattern. Ask for the resolution, the buffer solutions supplied for calibration and whether a spare electrode is included, since the electrode is the consumable part. |
| Weight set material | Slotted weights are listed in brass and in chrome plated iron. Brass resists corrosion better in a damp lab; chrome plated iron is the cheaper class set. Confirm the denominations and total mass in the set. |
| Weight box class | SLE3-0107 does not state a tolerance class. If the weights will calibrate a balance rather than load a hanger, ask for the class and whether a certificate is available. |
| Rubber cork hole count | Corks are listed as plain, one hole and two holes under separate codes. Give the sizes by bore and the quantity of each, as a distillation set-up usually needs more than one pattern. |
| Scalpel blades and handles | Blades, handles and a one-piece knife are separate codes. Blade and handle numbers must match, so state the blade number you use. |
| Vernier caliper reading | SLE3-0102 is an IME type and SLE3-0103 a digital type. Ask for the least count of the IME version and the resolution and battery type of the digital one. |
| Water distiller output | SLE3-0105 is listed without an output rate. Give the litres per hour you need and the supply voltage. |
| Code format | Two codes appear on the site without a leading zero, as SLE3-108 and SLE3-109, while the rest of the range uses four digits, and one item on the last page is coded in a different series entirely. Quote the code exactly as shown on the item page. |
Physics demonstration apparatus is also listed by topic under Physics Lab Equipments. Lab support hardware such as retort stands and tubing is under Lab Equipments, and dissection instruments under Dissecting Lab Tools.
Give the code, the specification and the quantity per class set, for example Wheatstone Bridge with Pencil Jockey (SLE3-0110) or Weights Slotted Brass (SLE3-0108) with the denominations you need, and contact Ray Export for prices and lead times. Parent range: Scientific Lab Equipments.
SLE3-0005 is the portable meter and SLE3-0006 the bench pattern. A portable meter can be carried to samples away from the bench; a bench meter stays set up for a class to use in turn. Either way, ask for the resolution, the buffer solutions supplied for calibration and whether a spare electrode is included, since the electrode is the consumable part and the meter cannot be used without a working one. Ask too how the electrode should be stored between lessons, because storage affects how long it lasts.
Both are listed: Weights Slotted Brass (SLE3-0108) and slotted iron chrome plated weights (SLE3-0109). Brass resists corrosion better in a damp lab; chrome plated iron is the more economical class set. Whichever you choose, confirm the denominations and the total mass in the set, and ask whether a hanger is included. On the site these two appear as SLE3-108 and SLE3-109 without the leading zero, so quote the code exactly as the item page shows it to avoid a mismatch on the quotation.
Only if its tolerance class suits the job, and the listing does not state one. If the weights will load a hanger in a mechanics practical, the class matters little. If they will check or calibrate a balance, ask for the tolerance class in writing before ordering, and contact us for the latest copies of the relevant certificates if your lab keeps calibration records. Also confirm the denominations in the box and whether forceps are supplied for handling, since fingerprints and dust change the mass of small weights.
Corks are listed as plain, one hole and two holes under separate codes, alongside rubber tubing. Give the sizes by bore and the quantity of each pattern, because one set-up usually needs more than one: a distillation set-up, for example, takes a holed cork for the thermometer or delivery tube and plain corks for stoppering. The same sundries group lists a pipe clay triangle, a pipette filler bulb, a three way pipette filler and a siphon pump, which can go on the same enquiry.
Only when the numbers match. Scalpel blades, scalpel handles and a one-piece scalpel knife are separate codes within SLE3-0058 to SLE3-0060, and each blade number fits a particular handle number. State the blade number you use, or the handle you already hold, when you enquire. The one-piece knife avoids the matching question altogether, which can suit younger classes where changing blades is itself a hazard. Other dissection instruments are listed separately under Dissecting Lab Tools.
SLE3-0102 is an IME type vernier caliper and SLE3-0103 a digital one. The vernier scale is read by hand, which is the skill a measurement practical sets out to teach; the digital caliper gives a direct reading and suits quick checks. Ask for the least count of the IME version, and for the resolution and battery type of the digital one. If the water distiller (SLE3-0105) is on the same order, give the litres per hour you need and the supply voltage, since it is listed without an output rate.
Ray Export is a manufacturer and exporter of laboratory, scientific and educational equipment based at Plot No. 449, HSIIDC Industrial Area, Saha, Ambala, Haryana 133104, India. Enquiries: [email protected], +91-9817319615.
Written by Palak Mall, Senior Content Writer. Technically reviewed by Arvind Kumar, Lab Equipment Specialist, 12+ years in laboratory and testing instrumentation. Last updated: 17 October 2026.
Specifications, tolerance classes and output rates are confirmed in writing on the quotation. For certificates, standards or approvals, contact us for the latest copies of the relevant certificates. No price is quoted on this page. Listing notes: two codes appear on the site as SLE3-108 and SLE3-109 without the leading zero, and one item on the last page is coded in a different series; the weight box is listed without a tolerance class and the water distiller without an output rate; and the table above names 30 of the 111 codes in SLE3-0001 to SLE3-0111, so check the item pages for anything not shown.
A light adaptable metallic strip furnished with contacts so when it is immediately squeezed an electric circuit is represented the deciding factor and when it is discharged the contrary impact is naturally delivered.
Metal Strip (Nickel plated) with protected handle and terminals mounted on a Bakelite plate of high protection.
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Wet and dry knob hygrometer display with plastic body incorporate mugginess diagram c&f
Range: - 10C to 50C
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Greatest and Minimum Thermometer display with head honcho plastic body, yellow glass with screen printing and mercury filled.
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