Humidity indicators show whether a critical level of moisture has been reached or exceeded in packaging. In combination with desiccants, they reflect the climate within the closed barriers of packaging and thus permit conclusions to be drawn regarding the state of sensitive packed goods. Humidity indicators consist of white, absorbent paper that is impregnated with a variety of coloured salt solutions in different areas. The moisture content of the impregnated indicator fields changes according to the relative humidity (RH) of the surrounding air – and they thus also change colour.
The colour changes from blue to pink with rising relative humidity and vice versa with falling humidity.
As a simple and economical aid, humidity indicators have a proven track record, with millions having been successfully used to provide packaging security. Under standard conditions, the permissible tolerances regarding indicator accuracy are +/- 5% relative humidity.
Under extreme temperature conditions, however, stronger variance may occur. Humidity indicators are also produced to comply with a variety of military specifications (TL, MIL, AFNOR).
We offer a wide range of humidity indicators in a variety of sizes, shapes and indicator areas, some of which have self-adhesive labels.
Typical areas of use are:
Part No. | Indicates (%RH) | Supply-No. | Dimensions | Language | Packaging |
3542 | 30,40, 50 % r.F. | 6850-00-752-8240 | 50 x 76 mm | D | 125/tin |
3711 | 30,40, 50 % r.F. | 6850-00-752-8240 | 50 x 76 mm | E | 125/tin |
3700 | 30,40, 50 % r.F. | 6850-12-152-8021 | 25 x 40 mm | D | 500/tin |
3579 | 30,40, 50 % r.F. | 6850-12-152-8021 | 25 x 40 mm | E | 500/tin |
3552 | 20-80% | 6685-12-194-4969 | 50 x 160 mm | D+E+F | 500/tin |
3551 | 8% | - | 82 x 82 mm | D | 625/tin |
Part No.. | Indicates (%RH) | Supply-N0. | Dimensions | Comments | Packaging |
3710 | 5, 10, 15 % r.F. | - | 50 x 76 mm | JEDEC | 125/tin |
200005295 | 5, 10, 15 % r.F. | - | 50 x 76 mm | JEDEC | 125/tin |
3572 | 10,20,30,40 % r. F. | - | 50 x 76 mm | SMD | 125/tin |
3574 | 10 - 30 % | - | 50 x 76 mm | 125/tin | |
3580 | 20 - 40 % | - | 50 x 76 mm | 125/tin | |
3561 | 10 - 60 % | - | 50 x 76 mm | 125/tin | |
3555 | 8 % | - | 50 x 60 mm | 300/tin | |
8522 | 40 % | - | 25 x 35 mm | 7000/ roll, self-adhesive |
Part No. | Description | Supply-No. | Dimensions | Comments | Packaging |
5272 | Irreversible indicator 50-90% | - | ca. 76 x 114 mm | MX 56789 | 50/tin |
3537 | Irreversible indicator 50-90% + reversible 10-100% | - | ca. 114 x 114 mm | MCX 56789 | 25/tin |
All humidity indicator cards are delivered in reclosable tins with desiccant bags and are thus serviceable for 5 years.
The Herrmann window has been specially developed for us in flexible barrier films (PE or aluminium composite foils). The viewing window can be supplied with a variety of indicator cards. It offers easy and reliable installation. A screw-in tool is included in the scope of delivery. The Herrmann window complies with TL 6685-0003.
Small viewing windows allow monitoring of the relative humidity within closed containers. Indicators with a diameter of 20 mm and a variety of indicator ranges can be inserted behind the viewing window.
Part No. | Indicates (%RH) | Supply-No. | Packaging |
---|---|---|---|
Z004101 | 30,40,50 % | - | 12/PE, 48/box |
Z004103 | 40% - 80% | - | 12/PE, 48/box |
Z004117 | no indicator | - | 12/PE, 48/box |
Z004104 | Viewing window for packed goods w/o indicator | - | 12/PE, 48/box |
Part No. | Indicates (%RH) | Supply No. | Packaging |
---|---|---|---|
Z004118 | 30,40,50 % r. F. | 6685-12-181-2445 | 10/paper sleeve, 50/drum |
Z004102 | 20% - 80% | 6685-12-337-1231 | 10/paper sleeve, 50/drum |
Part no. | Indicates (%RH) | Supply-No. | packaging |
---|---|---|---|
3640 | 30,40,50 | 6685-12-166-1928 | class, L 16mm |
3625 | 30,40,50 | - | class 1, L 28mm |
10356 | 30,40,50 | 6685-12-339-9465 | L 16mm, emc variant |
3605 | 30,40,50 | 6685-00-618-1822 | L 16mm, brass |
Part No. | Indicates (%RH) | Supply No. | packaging |
---|---|---|---|
3630 | 20, 30,40,50 % RH | 6685-01-176-0374 | SW 48mm |
3633 | 20, 30,40,50 % RH | - | Ø47 mm |
Part no. | Indicates (%RH) | Supply-No. | Packaging |
---|---|---|---|
9116 | 30,40, 50 | - | WAF 25 |
Part no. | Indicates (%RH) | Supply-No. | Packaging |
---|---|---|---|
3334 | 10, 20, 30 | 6685-12-182-8571 | 100/PE |
2332 | 30, 40, 50 6685-12-306-1324 | 100/PE | |
3540 | 40 | - | 100/PE |
Part No. | Description | Dimension | Packaging | Fig. No |
---|---|---|---|---|
200014484 | CDF electronic indicator ; J-DEC (5,10,60 % RH) | 50 x 76 mm | 125/D, 5000/KAR | 7 |
200014541 | CDF electronic indicator; J-DEC SS (10,20,30,40 % RH) | 50 x 76 mm | 100/D, 4000/KAR | 8 |
Part No. | Description | Dimensions | Packaging | Fig. No |
---|---|---|---|---|
200014484 | CF electronic Indicator CF (5,10,60 % RH) | 50 x 76 mm | 125/D, 5000/KAR | 9 |
200014541 | indikator-card; (10,20,30 und 40% RH) | 50 x 76 mm | 100/D, 4000/KAR | 10 |
200015134 | Indikator-card; (10-60% RH) | 40 x 120mm | 200/D, 500/KAR |